eventespresso / event-espresso-core

core/EE_Registry.core.php

Doc Comments +3 added lines, -2 removed lines

@@ -322,6 +322,7 @@ 
 
     /**
      * @param mixed string | EED_Module $module
+     * @param string $module
      * @throws OutOfBoundsException
      * @throws InvalidArgumentException
      * @throws InvalidInterfaceException
@@ -794,7 +795,7 @@ 
     /**
      * Recursively checks that a class exists and potentially attempts to load classes with non-FQCNs
      *
-     * @param string|object $class_name
+     * @param string $class_name
      * @param array         $arguments
      * @param int           $attempt
      * @return mixed
@@ -1377,7 +1378,7 @@ 
      * @param string $class_name
      * @param string $param_class
      * @param array  $arguments
-     * @param mixed  $index
+     * @param integer  $index
      * @return array
      * @throws InvalidArgumentException
      * @throws InvalidInterfaceException

Indentation +1661 added lines, -1661 removed lines

@@ -27,1667 +27,1667 @@
 class EE_Registry implements ResettableInterface
 {
 
-    /**
-     * @var EE_Registry $_instance
-     */
-    private static $_instance;
-
-    /**
-     * @var EE_Dependency_Map $_dependency_map
-     */
-    protected $_dependency_map;
-
-    /**
-     * @var Mirror
-     */
-    private $mirror;
-
-    /**
-     * @var ClassInterfaceCache $class_cache
-     */
-    private $class_cache;
-
-    /**
-     * @var array $_class_abbreviations
-     */
-    protected $_class_abbreviations = array();
-
-    /**
-     * @var CommandBusInterface $BUS
-     */
-    public $BUS;
-
-    /**
-     * @var EE_Cart $CART
-     */
-    public $CART;
-
-    /**
-     * @var EE_Config $CFG
-     */
-    public $CFG;
-
-    /**
-     * @var EE_Network_Config $NET_CFG
-     */
-    public $NET_CFG;
-
-    /**
-     * StdClass object for storing library classes in
-     *
-     * @var RegistryContainer $LIB
-     */
-    public $LIB;
-
-    /**
-     * @var EE_Request_Handler $REQ
-     */
-    public $REQ;
-
-    /**
-     * @var EE_Session $SSN
-     */
-    public $SSN;
-
-    /**
-     * @since 4.5.0
-     * @var EE_Capabilities $CAP
-     */
-    public $CAP;
-
-    /**
-     * @since 4.9.0
-     * @var EE_Message_Resource_Manager $MRM
-     */
-    public $MRM;
-
-    /**
-     * @var Registry $AssetsRegistry
-     */
-    public $AssetsRegistry;
-
-    /**
-     * StdClass object for holding addons which have registered themselves to work with EE core
-     *
-     * @var EE_Addon[] $addons
-     */
-    public $addons;
-
-    /**
-     * keys are 'short names' (eg Event), values are class names (eg 'EEM_Event')
-     *
-     * @var EEM_Base[] $models
-     */
-    public $models = array();
-
-    /**
-     * @var EED_Module[] $modules
-     */
-    public $modules;
-
-    /**
-     * @var EES_Shortcode[] $shortcodes
-     */
-    public $shortcodes;
-
-    /**
-     * @var WP_Widget[] $widgets
-     */
-    public $widgets;
-
-    /**
-     * this is an array of all implemented model names (i.e. not the parent abstract models, or models
-     * which don't actually fetch items from the DB in the normal way (ie, are not children of EEM_Base)).
-     * Keys are model "short names" (eg "Event") as used in model relations, and values are
-     * classnames (eg "EEM_Event")
-     *
-     * @var array $non_abstract_db_models
-     */
-    public $non_abstract_db_models = array();
-
-    /**
-     * internationalization for JS strings
-     *    usage:   EE_Registry::i18n_js_strings['string_key'] = esc_html__( 'string to translate.', 'event_espresso' );
-     *    in js file:  var translatedString = eei18n.string_key;
-     *
-     * @var array $i18n_js_strings
-     */
-    public static $i18n_js_strings = array();
-
-    /**
-     * $main_file - path to espresso.php
-     *
-     * @var array $main_file
-     */
-    public $main_file;
-
-    /**
-     * array of ReflectionClass objects where the key is the class name
-     *
-     * @deprecated $VID:$
-     * @var ReflectionClass[] $_reflectors
-     */
-    public $_reflectors;
-
-    /**
-     * boolean flag to indicate whether or not to load/save dependencies from/to the cache
-     *
-     * @var boolean $_cache_on
-     */
-    protected $_cache_on = true;
-
-    /**
-     * @var ObjectIdentifier
-     */
-    private $object_identifier;
-
-
-    /**
-     * @singleton method used to instantiate class object
-     * @param EE_Dependency_Map|null   $dependency_map
-     * @param Mirror|null              $mirror
-     * @param ClassInterfaceCache|null $class_cache
-     * @param ObjectIdentifier|null    $object_identifier
-     * @return EE_Registry instance
-     */
-    public static function instance(
-        EE_Dependency_Map $dependency_map = null,
-        Mirror $mirror = null,
-        ClassInterfaceCache $class_cache = null,
-        ObjectIdentifier $object_identifier = null
-    ) {
-        // check if class object is instantiated
-        if (
-            ! self::$_instance instanceof EE_Registry
-            && $dependency_map instanceof EE_Dependency_Map
-            && $mirror instanceof Mirror
-            && $class_cache instanceof ClassInterfaceCache
-            && $object_identifier instanceof ObjectIdentifier
-        ) {
-            self::$_instance = new self(
-                $dependency_map,
-                $mirror,
-                $class_cache,
-                $object_identifier
-            );
-        }
-        return self::$_instance;
-    }
-
-
-    /**
-     * protected constructor to prevent direct creation
-     *
-     * @Constructor
-     * @param  EE_Dependency_Map  $dependency_map
-     * @param Mirror              $mirror
-     * @param ClassInterfaceCache $class_cache
-     * @param ObjectIdentifier    $object_identifier
-     */
-    protected function __construct(
-        EE_Dependency_Map $dependency_map,
-        Mirror $mirror,
-        ClassInterfaceCache $class_cache,
-        ObjectIdentifier $object_identifier
-    ) {
-        $this->_dependency_map   = $dependency_map;
-        $this->mirror            = $mirror;
-        $this->class_cache       = $class_cache;
-        $this->object_identifier = $object_identifier;
-        // $registry_container = new RegistryContainer();
-        $this->LIB        = new RegistryContainer();
-        $this->addons     = new RegistryContainer();
-        $this->modules    = new RegistryContainer();
-        $this->shortcodes = new RegistryContainer();
-        $this->widgets    = new RegistryContainer();
-        add_action('EE_Load_Espresso_Core__handle_request__initialize_core_loading', array($this, 'initialize'));
-    }
-
-
-    /**
-     * initialize
-     *
-     * @throws OutOfBoundsException
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function initialize()
-    {
-        $this->_class_abbreviations = apply_filters(
-            'FHEE__EE_Registry____construct___class_abbreviations',
-            array(
-                'EE_Config'                                       => 'CFG',
-                'EE_Session'                                      => 'SSN',
-                'EE_Capabilities'                                 => 'CAP',
-                'EE_Cart'                                         => 'CART',
-                'EE_Network_Config'                               => 'NET_CFG',
-                'EE_Request_Handler'                              => 'REQ',
-                'EE_Message_Resource_Manager'                     => 'MRM',
-                'EventEspresso\core\services\commands\CommandBus' => 'BUS',
-                'EventEspresso\core\services\assets\Registry'     => 'AssetsRegistry',
-            )
-        );
-        $this->load_core('Base', array(), true);
-        // add our request and response objects to the cache
-        $request_loader = $this->_dependency_map->class_loader(
-            'EventEspresso\core\services\request\Request'
-        );
-        $this->_set_cached_class(
-            $request_loader(),
-            'EventEspresso\core\services\request\Request'
-        );
-        $response_loader = $this->_dependency_map->class_loader(
-            'EventEspresso\core\services\request\Response'
-        );
-        $this->_set_cached_class(
-            $response_loader(),
-            'EventEspresso\core\services\request\Response'
-        );
-        add_action('AHEE__EE_System__set_hooks_for_core', array($this, 'init'));
-    }
-
-
-    /**
-     * @return void
-     */
-    public function init()
-    {
-        // Get current page protocol
-        $protocol = isset($_SERVER['HTTPS']) ? 'https://' : 'http://';
-        // Output admin-ajax.php URL with same protocol as current page
-        self::$i18n_js_strings['ajax_url'] = admin_url('admin-ajax.php', $protocol);
-        self::$i18n_js_strings['wp_debug'] = defined('WP_DEBUG') ? WP_DEBUG : false;
-    }
-
-
-    /**
-     * localize_i18n_js_strings
-     *
-     * @return string
-     */
-    public static function localize_i18n_js_strings()
-    {
-        $i18n_js_strings = (array) self::$i18n_js_strings;
-        foreach ($i18n_js_strings as $key => $value) {
-            if (is_scalar($value)) {
-                $i18n_js_strings[ $key ] = html_entity_decode((string) $value, ENT_QUOTES, 'UTF-8');
-            }
-        }
-        return '/* <![CDATA[ */ var eei18n = ' . wp_json_encode($i18n_js_strings) . '; /* ]]> */';
-    }
-
-
-    /**
-     * @param mixed string | EED_Module $module
-     * @throws OutOfBoundsException
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function add_module($module)
-    {
-        if ($module instanceof EED_Module) {
-            $module_class                   = get_class($module);
-            $this->modules->{$module_class} = $module;
-        } else {
-            if (! class_exists('EE_Module_Request_Router', false)) {
-                $this->load_core('Module_Request_Router');
-            }
-            EE_Module_Request_Router::module_factory($module);
-        }
-    }
-
-
-    /**
-     * @param string $module_name
-     * @return mixed EED_Module | NULL
-     */
-    public function get_module($module_name = '')
-    {
-        return isset($this->modules->{$module_name})
-            ? $this->modules->{$module_name}
-            : null;
-    }
-
-
-    /**
-     * loads core classes - must be singletons
-     *
-     * @param string $class_name - simple class name ie: session
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @return mixed
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_core($class_name, $arguments = array(), $load_only = false)
-    {
-        $core_paths = apply_filters(
-            'FHEE__EE_Registry__load_core__core_paths',
-            array(
-                EE_CORE,
-                EE_ADMIN,
-                EE_CPTS,
-                EE_CORE . 'data_migration_scripts' . DS,
-                EE_CORE . 'capabilities' . DS,
-                EE_CORE . 'request_stack' . DS,
-                EE_CORE . 'middleware' . DS,
-            )
-        );
-        // retrieve instantiated class
-        return $this->_load(
-            $core_paths,
-            'EE_',
-            $class_name,
-            'core',
-            $arguments,
-            false,
-            true,
-            $load_only
-        );
-    }
-
-
-    /**
-     * loads service classes
-     *
-     * @param string $class_name - simple class name ie: session
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @return mixed
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_service($class_name, $arguments = array(), $load_only = false)
-    {
-        $service_paths = apply_filters(
-            'FHEE__EE_Registry__load_service__service_paths',
-            array(
-                EE_CORE . 'services' . DS,
-            )
-        );
-        // retrieve instantiated class
-        return $this->_load(
-            $service_paths,
-            'EE_',
-            $class_name,
-            'class',
-            $arguments,
-            false,
-            true,
-            $load_only
-        );
-    }
-
-
-    /**
-     * loads data_migration_scripts
-     *
-     * @param string $class_name - class name for the DMS ie: EE_DMS_Core_4_2_0
-     * @param mixed  $arguments
-     * @return EE_Data_Migration_Script_Base|mixed
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_dms($class_name, $arguments = array())
-    {
-        // retrieve instantiated class
-        return $this->_load(
-            EE_Data_Migration_Manager::instance()->get_data_migration_script_folders(),
-            'EE_DMS_',
-            $class_name,
-            'dms',
-            $arguments,
-            false,
-            false
-        );
-    }
-
-
-    /**
-     * loads object creating classes - must be singletons
-     *
-     * @param string $class_name - simple class name ie: attendee
-     * @param mixed  $arguments  - an array of arguments to pass to the class
-     * @param bool   $from_db    - some classes are instantiated from the db and thus call a different method to
-     *                           instantiate
-     * @param bool   $cache      if you don't want the class to be stored in the internal cache (non-persistent) then
-     *                           set this to FALSE (ie. when instantiating model objects from client in a loop)
-     * @param bool   $load_only  whether or not to just load the file and NOT instantiate, or load AND instantiate
-     *                           (default)
-     * @return EE_Base_Class | bool
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_class($class_name, $arguments = array(), $from_db = false, $cache = true, $load_only = false)
-    {
-        $paths = apply_filters(
-            'FHEE__EE_Registry__load_class__paths', array(
-                EE_CORE,
-                EE_CLASSES,
-                EE_BUSINESS,
-            )
-        );
-        // retrieve instantiated class
-        return $this->_load(
-            $paths,
-            'EE_',
-            $class_name,
-            'class',
-            $arguments,
-            $from_db,
-            $cache,
-            $load_only
-        );
-    }
-
-
-    /**
-     * loads helper classes - must be singletons
-     *
-     * @param string $class_name - simple class name ie: price
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @return EEH_Base | bool
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_helper($class_name, $arguments = array(), $load_only = true)
-    {
-        // todo: add doing_it_wrong() in a few versions after all addons have had calls to this method removed
-        $helper_paths = apply_filters('FHEE__EE_Registry__load_helper__helper_paths', array(EE_HELPERS));
-        // retrieve instantiated class
-        return $this->_load(
-            $helper_paths,
-            'EEH_',
-            $class_name,
-            'helper',
-            $arguments,
-            false,
-            true,
-            $load_only
-        );
-    }
-
-
-    /**
-     * loads core classes - must be singletons
-     *
-     * @param string $class_name - simple class name ie: session
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @param bool   $cache      whether to cache the object or not.
-     * @return mixed
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_lib($class_name, $arguments = array(), $load_only = false, $cache = true)
-    {
-        $paths = array(
-            EE_LIBRARIES,
-            EE_LIBRARIES . 'messages' . DS,
-            EE_LIBRARIES . 'shortcodes' . DS,
-            EE_LIBRARIES . 'qtips' . DS,
-            EE_LIBRARIES . 'payment_methods' . DS,
-        );
-        // retrieve instantiated class
-        return $this->_load(
-            $paths,
-            'EE_',
-            $class_name,
-            'lib',
-            $arguments,
-            false,
-            $cache,
-            $load_only
-        );
-    }
-
-
-    /**
-     * loads model classes - must be singletons
-     *
-     * @param string $class_name - simple class name ie: price
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @return EEM_Base | bool
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_model($class_name, $arguments = array(), $load_only = false)
-    {
-        $paths = apply_filters(
-            'FHEE__EE_Registry__load_model__paths', array(
-                EE_MODELS,
-                EE_CORE,
-            )
-        );
-        // retrieve instantiated class
-        return $this->_load(
-            $paths,
-            'EEM_',
-            $class_name,
-            'model',
-            $arguments,
-            false,
-            true,
-            $load_only
-        );
-    }
-
-
-    /**
-     * loads model classes - must be singletons
-     *
-     * @param string $class_name - simple class name ie: price
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @return mixed | bool
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_model_class($class_name, $arguments = array(), $load_only = true)
-    {
-        $paths = array(
-            EE_MODELS . 'fields' . DS,
-            EE_MODELS . 'helpers' . DS,
-            EE_MODELS . 'relations' . DS,
-            EE_MODELS . 'strategies' . DS,
-        );
-        // retrieve instantiated class
-        return $this->_load(
-            $paths,
-            'EE_',
-            $class_name,
-            '',
-            $arguments,
-            false,
-            true,
-            $load_only
-        );
-    }
-
-
-    /**
-     * Determines if $model_name is the name of an actual EE model.
-     *
-     * @param string $model_name like Event, Attendee, Question_Group_Question, etc.
-     * @return boolean
-     */
-    public function is_model_name($model_name)
-    {
-        return isset($this->models[ $model_name ]);
-    }
-
-
-    /**
-     * generic class loader
-     *
-     * @param string $path_to_file - directory path to file location, not including filename
-     * @param string $file_name    - file name  ie:  my_file.php, including extension
-     * @param string $type         - file type - core? class? helper? model?
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @return mixed
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_file($path_to_file, $file_name, $type = '', $arguments = array(), $load_only = true)
-    {
-        // retrieve instantiated class
-        return $this->_load(
-            $path_to_file,
-            '',
-            $file_name,
-            $type,
-            $arguments,
-            false,
-            true,
-            $load_only
-        );
-    }
-
-
-    /**
-     * @param string $path_to_file - directory path to file location, not including filename
-     * @param string $class_name   - full class name  ie:  My_Class
-     * @param string $type         - file type - core? class? helper? model?
-     * @param mixed  $arguments
-     * @param bool   $load_only
-     * @return bool|EE_Addon|object
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function load_addon($path_to_file, $class_name, $type = 'class', $arguments = array(), $load_only = false)
-    {
-        // retrieve instantiated class
-        return $this->_load(
-            $path_to_file,
-            'addon',
-            $class_name,
-            $type,
-            $arguments,
-            false,
-            true,
-            $load_only
-        );
-    }
-
-
-    /**
-     * instantiates, caches, and automatically resolves dependencies
-     * for classes that use a Fully Qualified Class Name.
-     * if the class is not capable of being loaded using PSR-4 autoloading,
-     * then you need to use one of the existing load_*() methods
-     * which can resolve the classname and filepath from the passed arguments
-     *
-     * @param bool|string $class_name   Fully Qualified Class Name
-     * @param array       $arguments    an argument, or array of arguments to pass to the class upon instantiation
-     * @param bool        $cache        whether to cache the instantiated object for reuse
-     * @param bool        $from_db      some classes are instantiated from the db
-     *                                  and thus call a different method to instantiate
-     * @param bool        $load_only    if true, will only load the file, but will NOT instantiate an object
-     * @param bool|string $addon        if true, will cache the object in the EE_Registry->$addons array
-     * @return bool|null|mixed          null = failure to load or instantiate class object.
-     *                                  object = class loaded and instantiated successfully.
-     *                                  bool = fail or success when $load_only is true
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public function create(
-        $class_name = false,
-        $arguments = array(),
-        $cache = false,
-        $from_db = false,
-        $load_only = false,
-        $addon = false
-    ) {
-        $class_name   = ltrim($class_name, '\\');
-        $class_name   = $this->class_cache->getFqnForAlias($class_name);
-        $class_exists = $this->loadOrVerifyClassExists($class_name, $arguments);
-        // if a non-FQCN was passed, then
-        // verifyClassExists() might return an object
-        // or it could return null if the class just could not be found anywhere
-        if ($class_exists instanceof $class_name || $class_exists === null) {
-            // either way, return the results
-            return $class_exists;
-        }
-        $class_name = $class_exists;
-        // if we're only loading the class and it already exists, then let's just return true immediately
-        if ($load_only) {
-            return true;
-        }
-        $addon = $addon ? 'addon' : '';
-        // $this->_cache_on is toggled during the recursive loading that can occur with dependency injection
-        // $cache is controlled by individual calls to separate Registry loader methods like load_class()
-        // $load_only is also controlled by individual calls to separate Registry loader methods like load_file()
-        if ($this->_cache_on && $cache && ! $load_only) {
-            // return object if it's already cached
-            $cached_class = $this->_get_cached_class($class_name, $addon, $arguments);
-            if ($cached_class !== null) {
-                return $cached_class;
-            }
-        }// obtain the loader method from the dependency map
-        $loader = $this->_dependency_map->class_loader($class_name);// instantiate the requested object
-        if ($loader instanceof Closure) {
-            $class_obj = $loader($arguments);
-        } else {
-            if ($loader && method_exists($this, $loader)) {
-                $class_obj = $this->{$loader}($class_name, $arguments);
-            } else {
-                $class_obj = $this->_create_object($class_name, $arguments, $addon, $from_db);
-            }
-        }
-        if (($this->_cache_on && $cache) || $this->get_class_abbreviation($class_name, '')) {
-            // save it for later... kinda like gum  { : $
-            $this->_set_cached_class(
-                $class_obj,
-                $class_name,
-                $addon,
-                $from_db,
-                $arguments
-            );
-        }
-        $this->_cache_on = true;
-        return $class_obj;
-    }
-
-
-    /**
-     * Recursively checks that a class exists and potentially attempts to load classes with non-FQCNs
-     *
-     * @param string|object $class_name
-     * @param array         $arguments
-     * @param int           $attempt
-     * @return mixed
-     */
-    private function loadOrVerifyClassExists($class_name, array $arguments, $attempt = 1)
-    {
-        if (is_object($class_name) || class_exists($class_name)) {
-            return $class_name;
-        }
-        switch ($attempt) {
-            case 1:
-                // if it's a FQCN then maybe the class is registered with a preceding \
-                $class_name = strpos($class_name, '\\') !== false
-                    ? '\\' . ltrim($class_name, '\\')
-                    : $class_name;
-                break;
-            case 2:
-                //
-                $loader = $this->_dependency_map->class_loader($class_name);
-                if ($loader && method_exists($this, $loader)) {
-                    return $this->{$loader}($class_name, $arguments);
-                }
-                break;
-            case 3:
-            default;
-                return null;
-        }
-        $attempt++;
-        return $this->loadOrVerifyClassExists($class_name, $arguments, $attempt);
-    }
-
-
-    /**
-     * instantiates, caches, and injects dependencies for classes
-     *
-     * @param array       $file_paths   an array of paths to folders to look in
-     * @param string      $class_prefix EE  or EEM or... ???
-     * @param bool|string $class_name   $class name
-     * @param string      $type         file type - core? class? helper? model?
-     * @param mixed       $arguments    an argument or array of arguments to pass to the class upon instantiation
-     * @param bool        $from_db      some classes are instantiated from the db
-     *                                  and thus call a different method to instantiate
-     * @param bool        $cache        whether to cache the instantiated object for reuse
-     * @param bool        $load_only    if true, will only load the file, but will NOT instantiate an object
-     * @return bool|null|object null = failure to load or instantiate class object.
-     *                                  object = class loaded and instantiated successfully.
-     *                                  bool = fail or success when $load_only is true
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws InvalidArgumentException
-     */
-    protected function _load(
-        $file_paths = array(),
-        $class_prefix = 'EE_',
-        $class_name = false,
-        $type = 'class',
-        $arguments = array(),
-        $from_db = false,
-        $cache = true,
-        $load_only = false
-    ) {
-        $class_name = ltrim($class_name, '\\');
-        // strip php file extension
-        $class_name = str_replace('.php', '', trim($class_name));
-        // does the class have a prefix ?
-        if (! empty($class_prefix) && $class_prefix !== 'addon') {
-            // make sure $class_prefix is uppercase
-            $class_prefix = strtoupper(trim($class_prefix));
-            // add class prefix ONCE!!!
-            $class_name = $class_prefix . str_replace($class_prefix, '', $class_name);
-        }
-        $class_name   = $this->class_cache->getFqnForAlias($class_name);
-        $class_exists = class_exists($class_name, false);
-        // if we're only loading the class and it already exists, then let's just return true immediately
-        if ($load_only && $class_exists) {
-            return true;
-        }
-        // $this->_cache_on is toggled during the recursive loading that can occur with dependency injection
-        // $cache is controlled by individual calls to separate Registry loader methods like load_class()
-        // $load_only is also controlled by individual calls to separate Registry loader methods like load_file()
-        if ($this->_cache_on && $cache && ! $load_only) {
-            // return object if it's already cached
-            $cached_class = $this->_get_cached_class($class_name, $class_prefix, $arguments);
-            if ($cached_class !== null) {
-                return $cached_class;
-            }
-        }
-        // if the class doesn't already exist.. then we need to try and find the file and load it
-        if (! $class_exists) {
-            // get full path to file
-            $path = $this->_resolve_path($class_name, $type, $file_paths);
-            // load the file
-            $loaded = $this->_require_file($path, $class_name, $type, $file_paths);
-            // if we are only loading a file but NOT instantiating an object
-            // then return boolean for whether class was loaded or not
-            if ($load_only) {
-                return $loaded;
-            }
-            // if an object was expected but loading failed, then return nothing
-            if (! $loaded) {
-                return null;
-            }
-        }
-        // instantiate the requested object
-        $class_obj = $this->_create_object($class_name, $arguments, $type, $from_db);
-        if ($this->_cache_on && $cache) {
-            // save it for later... kinda like gum  { : $
-            $this->_set_cached_class(
-                $class_obj,
-                $class_name,
-                $class_prefix,
-                $from_db,
-                $arguments
-            );
-        }
-        $this->_cache_on = true;
-        return $class_obj;
-    }
-
-
-    /**
-     * @param string $class_name
-     * @param string $default have to specify something, but not anything that will conflict
-     * @return mixed|string
-     */
-    protected function get_class_abbreviation($class_name, $default = 'FANCY_BATMAN_PANTS')
-    {
-        return isset($this->_class_abbreviations[ $class_name ])
-            ? $this->_class_abbreviations[ $class_name ]
-            : $default;
-    }
-
-
-    /**
-     * attempts to find a cached version of the requested class
-     * by looking in the following places:
-     *        $this->{$class_abbreviation}            ie:    $this->CART
-     *        $this->{$class_name}                        ie:    $this->Some_Class
-     *        $this->LIB->{$class_name}                ie:    $this->LIB->Some_Class
-     *        $this->addon->{$class_name}    ie:    $this->addon->Some_Addon_Class
-     *
-     * @param string $class_name
-     * @param string $class_prefix
-     * @param array  $arguments
-     * @return mixed
-     */
-    protected function _get_cached_class(
-        $class_name,
-        $class_prefix = '',
-        $arguments = array()
-    ) {
-        if ($class_name === 'EE_Registry') {
-            return $this;
-        }
-        $class_abbreviation = $this->get_class_abbreviation($class_name);
-        // check if class has already been loaded, and return it if it has been
-        if (isset($this->{$class_abbreviation})) {
-            return $this->{$class_abbreviation};
-        }
-        $class_name = str_replace('\\', '_', $class_name);
-        if (isset ($this->{$class_name})) {
-            return $this->{$class_name};
-        }
-        if ($class_prefix === 'addon' && isset ($this->addons->{$class_name})) {
-            return $this->addons->{$class_name};
-        }
-        $object_identifier = $this->object_identifier->getIdentifier($class_name, $arguments);
-        if (isset($this->LIB->{$object_identifier})) {
-            return $this->LIB->{$object_identifier};
-        }
-        foreach ($this->LIB as $key => $object) {
-            if (
-                // request does not contain new arguments and therefore no args identifier
-                ! $this->object_identifier->hasArguments($object_identifier)
-                // but previously cached class with args was found
-                && $this->object_identifier->fqcnMatchesObjectIdentifier($class_name, $key)
-            ) {
-                return $object;
-            }
-        }
-        return null;
-    }
-
-
-    /**
-     * removes a cached version of the requested class
-     *
-     * @param string  $class_name
-     * @param boolean $addon
-     * @param array   $arguments
-     * @return boolean
-     */
-    public function clear_cached_class(
-        $class_name,
-        $addon = false,
-        $arguments = array()
-    ) {
-        $class_abbreviation = $this->get_class_abbreviation($class_name);
-        // check if class has already been loaded, and return it if it has been
-        if (isset($this->{$class_abbreviation})) {
-            $this->{$class_abbreviation} = null;
-            return true;
-        }
-        $class_name = str_replace('\\', '_', $class_name);
-        if (isset($this->{$class_name})) {
-            $this->{$class_name} = null;
-            return true;
-        }
-        if ($addon && isset($this->addons->{$class_name})) {
-            unset($this->addons->{$class_name});
-            return true;
-        }
-        $class_name = $this->object_identifier->getIdentifier($class_name, $arguments);
-        if (isset($this->LIB->{$class_name})) {
-            unset($this->LIB->{$class_name});
-            return true;
-        }
-        return false;
-    }
-
-
-    /**
-     * _set_cached_class
-     * attempts to cache the instantiated class locally
-     * in one of the following places, in the following order:
-     *        $this->{class_abbreviation}   ie:    $this->CART
-     *        $this->{$class_name}          ie:    $this->Some_Class
-     *        $this->addon->{$$class_name}    ie:    $this->addon->Some_Addon_Class
-     *        $this->LIB->{$class_name}     ie:    $this->LIB->Some_Class
-     *
-     * @param object $class_obj
-     * @param string $class_name
-     * @param string $class_prefix
-     * @param bool   $from_db
-     * @param array  $arguments
-     * @return void
-     */
-    protected function _set_cached_class(
-        $class_obj,
-        $class_name,
-        $class_prefix = '',
-        $from_db = false,
-        $arguments = array()
-    ) {
-        if ($class_name === 'EE_Registry' || empty($class_obj)) {
-            return;
-        }
-        // return newly instantiated class
-        $class_abbreviation = $this->get_class_abbreviation($class_name, '');
-        if ($class_abbreviation) {
-            $this->{$class_abbreviation} = $class_obj;
-            return;
-        }
-        $class_name = str_replace('\\', '_', $class_name);
-        if (property_exists($this, $class_name)) {
-            $this->{$class_name} = $class_obj;
-            return;
-        }
-        if ($class_prefix === 'addon') {
-            $this->addons->{$class_name} = $class_obj;
-            return;
-        }
-        if (! $from_db) {
-            $class_name               = $this->object_identifier->getIdentifier($class_name, $arguments);
-            $this->LIB->{$class_name} = $class_obj;
-        }
-    }
-
-
-    /**
-     * attempts to find a full valid filepath for the requested class.
-     * loops thru each of the base paths in the $file_paths array and appends : "{classname} . {file type} . php"
-     * then returns that path if the target file has been found and is readable
-     *
-     * @param string $class_name
-     * @param string $type
-     * @param array  $file_paths
-     * @return string | bool
-     */
-    protected function _resolve_path($class_name, $type = '', $file_paths = array())
-    {
-        // make sure $file_paths is an array
-        $file_paths = is_array($file_paths)
-            ? $file_paths
-            : array($file_paths);
-        // cycle thru paths
-        foreach ($file_paths as $key => $file_path) {
-            // convert all separators to proper DS, if no filepath, then use EE_CLASSES
-            $file_path = $file_path
-                ? str_replace(array('/', '\\'), DS, $file_path)
-                : EE_CLASSES;
-            // prep file type
-            $type = ! empty($type)
-                ? trim($type, '.') . '.'
-                : '';
-            // build full file path
-            $file_paths[ $key ] = rtrim($file_path, DS) . DS . $class_name . '.' . $type . 'php';
-            //does the file exist and can be read ?
-            if (is_readable($file_paths[ $key ])) {
-                return $file_paths[ $key ];
-            }
-        }
-        return false;
-    }
-
-
-    /**
-     * basically just performs a require_once()
-     * but with some error handling
-     *
-     * @param  string $path
-     * @param  string $class_name
-     * @param  string $type
-     * @param  array  $file_paths
-     * @return bool
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _require_file($path, $class_name, $type = '', $file_paths = array())
-    {
-        $this->resolve_legacy_class_parent($class_name);
-        // don't give up! you gotta...
-        try {
-            //does the file exist and can it be read ?
-            if (! $path) {
-                // just in case the file has already been autoloaded,
-                // but discrepancies in the naming schema are preventing it from
-                // being loaded via one of the EE_Registry::load_*() methods,
-                // then let's try one last hail mary before throwing an exception
-                // and call class_exists() again, but with autoloading turned ON
-                if (class_exists($class_name)) {
-                    return true;
-                }
-                // so sorry, can't find the file
-                throw new EE_Error (
-                    sprintf(
-                        esc_html__(
-                            'The %1$s file %2$s could not be located or is not readable due to file permissions. Please ensure that the following filepath(s) are correct: %3$s',
-                            'event_espresso'
-                        ),
-                        trim($type, '.'),
-                        $class_name,
-                        '<br />' . implode(',<br />', $file_paths)
-                    )
-                );
-            }
-            // get the file
-            require_once($path);
-            // if the class isn't already declared somewhere
-            if (class_exists($class_name, false) === false) {
-                // so sorry, not a class
-                throw new EE_Error(
-                    sprintf(
-                        esc_html__(
-                            'The %s file %s does not appear to contain the %s Class.',
-                            'event_espresso'
-                        ),
-                        $type,
-                        $path,
-                        $class_name
-                    )
-                );
-            }
-        } catch (EE_Error $e) {
-            $e->get_error();
-            return false;
-        }
-        return true;
-    }
-
-
-    /**
-     * Some of our legacy classes that extended a parent class would simply use a require() statement
-     * before their class declaration in order to ensure that the parent class was loaded.
-     * This is not ideal, but it's nearly impossible to determine the parent class of a non-namespaced class,
-     * without triggering a fatal error because the parent class has yet to be loaded and therefore doesn't exist.
-     *
-     * @param string $class_name
-     */
-    protected function resolve_legacy_class_parent($class_name = '')
-    {
-        try {
-            $legacy_parent_class_map = array(
-                'EE_Payment_Processor' => 'core/business/EE_Processor_Base.class.php',
-            );
-            if (isset($legacy_parent_class_map[ $class_name ])) {
-                require_once EE_PLUGIN_DIR_PATH . $legacy_parent_class_map[ $class_name ];
-            }
-        } catch (Exception $exception) {
-        }
-    }
-
-
-    /**
-     * _create_object
-     * Attempts to instantiate the requested class via any of the
-     * commonly used instantiation methods employed throughout EE.
-     * The priority for instantiation is as follows:
-     *        - abstract classes or any class flagged as "load only" (no instantiation occurs)
-     *        - model objects via their 'new_instance_from_db' method
-     *        - model objects via their 'new_instance' method
-     *        - "singleton" classes" via their 'instance' method
-     *    - standard instantiable classes via their __constructor
-     * Prior to instantiation, if the classname exists in the dependency_map,
-     * then the constructor for the requested class will be examined to determine
-     * if any dependencies exist, and if they can be injected.
-     * If so, then those classes will be added to the array of arguments passed to the constructor
-     *
-     * @param string $class_name
-     * @param array  $arguments
-     * @param string $type
-     * @param bool   $from_db
-     * @return null|object|bool
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     */
-    protected function _create_object($class_name, $arguments = array(), $type = '', $from_db = false)
-    {
-        // create reflection
-        $reflector = $this->mirror->getReflectionClass($class_name);
-        // make sure arguments are an array
-        $arguments = is_array($arguments)
-            ? $arguments
-            : array($arguments);
-        // and if arguments array is numerically and sequentially indexed, then we want it to remain as is,
-        // else wrap it in an additional array so that it doesn't get split into multiple parameters
-        $arguments = $this->_array_is_numerically_and_sequentially_indexed($arguments)
-            ? $arguments
-            : array($arguments);
-        // attempt to inject dependencies ?
-        if ($this->_dependency_map->has($class_name)) {
-            $arguments = $this->_resolve_dependencies($reflector, $class_name, $arguments);
-        }
-        // instantiate the class if possible
-        if ($reflector->isAbstract()) {
-            // nothing to instantiate, loading file was enough
-            // does not throw an exception so $instantiation_mode is unused
-            // $instantiation_mode = "1) no constructor abstract class";
-            return true;
-        }
-        if (
-            empty($arguments)
-            && $this->mirror->getConstructorFromReflection($reflector) === null
-            && $reflector->isInstantiable()
-        ) {
-            // no constructor = static methods only... nothing to instantiate, loading file was enough
-            // $instantiation_mode = "2) no constructor but instantiable";
-            return $reflector->newInstance();
-        }
-        if ($from_db && method_exists($class_name, 'new_instance_from_db')) {
-            // $instantiation_mode = "3) new_instance_from_db()";
-            return call_user_func_array(array($class_name, 'new_instance_from_db'), $arguments);
-        }
-        if (method_exists($class_name, 'new_instance')) {
-            // $instantiation_mode = "4) new_instance()";
-            return call_user_func_array(array($class_name, 'new_instance'), $arguments);
-        }
-        if (method_exists($class_name, 'instance')) {
-            // $instantiation_mode = "5) instance()";
-            return call_user_func_array(array($class_name, 'instance'), $arguments);
-        }
-        if ($reflector->isInstantiable()) {
-            // $instantiation_mode = "6) constructor";
-            return $reflector->newInstanceArgs($arguments);
-        }
-        // heh ? something's not right !
-        throw new EE_Error(
-            sprintf(
-                __('The %s file %s could not be instantiated.', 'event_espresso'),
-                $type,
-                $class_name
-            )
-        );
-    }
-
-
-    /**
-     * @see http://stackoverflow.com/questions/173400/how-to-check-if-php-array-is-associative-or-sequential
-     * @param array $array
-     * @return bool
-     */
-    protected function _array_is_numerically_and_sequentially_indexed(array $array)
-    {
-        return ! empty($array)
-            ? array_keys($array) === range(0, count($array) - 1)
-            : true;
-    }
-
-
-    /**
-     * _resolve_dependencies
-     * examines the constructor for the requested class to determine
-     * if any dependencies exist, and if they can be injected.
-     * If so, then those classes will be added to the array of arguments passed to the constructor
-     * PLZ NOTE: this is achieved by type hinting the constructor params
-     * For example:
-     *        if attempting to load a class "Foo" with the following constructor:
-     *        __construct( Bar $bar_class, Fighter $grohl_class )
-     *        then $bar_class and $grohl_class will be added to the $arguments array,
-     *        but only IF they are NOT already present in the incoming arguments array,
-     *        and the correct classes can be loaded
-     *
-     * @param ReflectionClass $reflector
-     * @param string          $class_name
-     * @param array           $arguments
-     * @return array
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _resolve_dependencies(ReflectionClass $reflector, $class_name, array $arguments = array())
-    {
-        // let's examine the constructor
-        $constructor = $this->mirror->getConstructorFromReflection($reflector);
-        // whu? huh? nothing?
-        if (! $constructor) {
-            return $arguments;
-        }
-        // get constructor parameters
-        $params = $this->mirror->getParametersFromReflection($reflector);
-        // and the keys for the incoming arguments array so that we can compare existing arguments with what is expected
-        $argument_keys = array_keys($arguments);
-        // now loop thru all of the constructors expected parameters
-        foreach ($params as $index => $param) {
-            // is this a dependency for a specific class ?
-            $param_class = $this->mirror->getParameterClassName($param, $class_name, $index);
-            // BUT WAIT !!! This class may be an alias for something else (or getting replaced at runtime)
-            $param_class = $this->class_cache->isAlias($param_class, $class_name)
-                ? $this->class_cache->getFqnForAlias($param_class, $class_name)
-                : $param_class;
-            if (
-                // param is not even a class
-                $param_class === null
-                // and something already exists in the incoming arguments for this param
-                && array_key_exists($index, $argument_keys)
-                && array_key_exists($argument_keys[ $index ], $arguments)
-            ) {
-                // so let's skip this argument and move on to the next
-                continue;
-            }
-            if (
-                // parameter is type hinted as a class, exists as an incoming argument, AND it's the correct class
-                $param_class !== null
-                && isset($argument_keys[ $index ], $arguments[ $argument_keys[ $index ] ])
-                && $arguments[ $argument_keys[ $index ] ] instanceof $param_class
-            ) {
-                // skip this argument and move on to the next
-                continue;
-            }
-            if (
-                // parameter is type hinted as a class, and should be injected
-                $param_class !== null
-                && $this->_dependency_map->has_dependency_for_class($class_name, $param_class)
-            ) {
-                $arguments = $this->_resolve_dependency(
-                    $class_name,
-                    $param_class,
-                    $arguments,
-                    $index
-                );
-            } else {
-                $arguments[ $index ] = $this->mirror->getParameterDefaultValue(
-                    $param,
-                    $class_name,
-                    $index
-                );
-            }
-        }
-        return $arguments;
-    }
-
-
-    /**
-     * @param string $class_name
-     * @param string $param_class
-     * @param array  $arguments
-     * @param mixed  $index
-     * @return array
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     */
-    protected function _resolve_dependency($class_name, $param_class, $arguments, $index)
-    {
-        $dependency = null;
-        // should dependency be loaded from cache ?
-        $cache_on = $this->_dependency_map->loading_strategy_for_class_dependency(
-            $class_name,
-            $param_class
-        );
-        $cache_on = $cache_on !== EE_Dependency_Map::load_new_object;
-        // we might have a dependency...
-        // let's MAYBE try and find it in our cache if that's what's been requested
-        $cached_class = $cache_on
-            ? $this->_get_cached_class($param_class)
-            : null;
-        // and grab it if it exists
-        if ($cached_class instanceof $param_class) {
-            $dependency = $cached_class;
-        } elseif ($param_class !== $class_name) {
-            // obtain the loader method from the dependency map
-            $loader = $this->_dependency_map->class_loader($param_class);
-            // is loader a custom closure ?
-            if ($loader instanceof Closure) {
-                $dependency = $loader($arguments);
-            } else {
-                // set the cache on property for the recursive loading call
-                $this->_cache_on = $cache_on;
-                // if not, then let's try and load it via the registry
-                if ($loader && method_exists($this, $loader)) {
-                    $dependency = $this->{$loader}($param_class);
-                } else {
-                    $dependency = LoaderFactory::getLoader()->load(
-                        $param_class,
-                        array(),
-                        $cache_on
-                    );
-                }
-            }
-        }
-        // did we successfully find the correct dependency ?
-        if ($dependency instanceof $param_class) {
-            // then let's inject it into the incoming array of arguments at the correct location
-            $arguments[ $index ] = $dependency;
-        }
-        return $arguments;
-    }
-
-
-    /**
-     * call any loader that's been registered in the EE_Dependency_Map::$_class_loaders array
-     *
-     * @param string $classname PLEASE NOTE: the class name needs to match what's registered
-     *                          in the EE_Dependency_Map::$_class_loaders array,
-     *                          including the class prefix, ie: "EE_", "EEM_", "EEH_", etc
-     * @param array  $arguments
-     * @return object
-     */
-    public static function factory($classname, $arguments = array())
-    {
-        $loader = self::instance()->_dependency_map->class_loader($classname);
-        if ($loader instanceof Closure) {
-            return $loader($arguments);
-        }
-        if (method_exists(self::instance(), $loader)) {
-            return self::instance()->{$loader}($classname, $arguments);
-        }
-        return null;
-    }
-
-
-    /**
-     * Gets the addon by its class name
-     *
-     * @param string $class_name
-     * @return EE_Addon
-     */
-    public function getAddon($class_name)
-    {
-        $class_name = str_replace('\\', '_', $class_name);
-        return $this->addons->{$class_name};
-    }
-
-
-    /**
-     * removes the addon from the internal cache
-     *
-     * @param string $class_name
-     * @return void
-     */
-    public function removeAddon($class_name)
-    {
-        $class_name = str_replace('\\', '_', $class_name);
-        unset($this->addons->{$class_name});
-    }
-
-
-    /**
-     * Gets the addon by its name/slug (not classname. For that, just
-     * use the get_addon() method above
-     *
-     * @param string $name
-     * @return EE_Addon
-     */
-    public function get_addon_by_name($name)
-    {
-        foreach ($this->addons as $addon) {
-            if ($addon->name() === $name) {
-                return $addon;
-            }
-        }
-        return null;
-    }
-
-
-    /**
-     * Gets an array of all the registered addons, where the keys are their names.
-     * (ie, what each returns for their name() function)
-     * They're already available on EE_Registry::instance()->addons as properties,
-     * where each property's name is the addon's classname,
-     * So if you just want to get the addon by classname,
-     * OR use the get_addon() method above.
-     * PLEASE  NOTE:
-     * addons with Fully Qualified Class Names
-     * have had the namespace separators converted to underscores,
-     * so a classname like Fully\Qualified\ClassName
-     * would have been converted to Fully_Qualified_ClassName
-     *
-     * @return EE_Addon[] where the KEYS are the addon's name()
-     */
-    public function get_addons_by_name()
-    {
-        $addons = array();
-        foreach ($this->addons as $addon) {
-            $addons[ $addon->name() ] = $addon;
-        }
-        return $addons;
-    }
-
-
-    /**
-     * Resets the specified model's instance AND makes sure EE_Registry doesn't keep
-     * a stale copy of it around
-     *
-     * @param string $model_name
-     * @return \EEM_Base
-     * @throws \EE_Error
-     */
-    public function reset_model($model_name)
-    {
-        $model_class_name = strpos($model_name, 'EEM_') !== 0
-            ? "EEM_{$model_name}"
-            : $model_name;
-        if (! isset($this->LIB->{$model_class_name}) || ! $this->LIB->{$model_class_name} instanceof EEM_Base) {
-            return null;
-        }
-        //get that model reset it and make sure we nuke the old reference to it
-        if ($this->LIB->{$model_class_name} instanceof $model_class_name
-            && is_callable(
-                array($model_class_name, 'reset')
-            )) {
-            $this->LIB->{$model_class_name} = $this->LIB->{$model_class_name}->reset();
-        } else {
-            throw new EE_Error(
-                sprintf(
-                    esc_html__('Model %s does not have a method "reset"', 'event_espresso'),
-                    $model_name
-                )
-            );
-        }
-        return $this->LIB->{$model_class_name};
-    }
-
-
-    /**
-     * Resets the registry.
-     * The criteria for what gets reset is based on what can be shared between sites on the same request when
-     * switch_to_blog is used in a multisite install.  Here is a list of things that are NOT reset.
-     * - $_dependency_map
-     * - $_class_abbreviations
-     * - $NET_CFG (EE_Network_Config): The config is shared network wide so no need to reset.
-     * - $REQ:  Still on the same request so no need to change.
-     * - $CAP: There is no site specific state in the EE_Capability class.
-     * - $SSN: Although ideally, the session should not be shared between site switches, we can't reset it because only
-     * one Session can be active in a single request.  Resetting could resolve in "headers already sent" errors.
-     * - $addons:  In multisite, the state of the addons is something controlled via hooks etc in a normal request.  So
-     *             for now, we won't reset the addons because it could break calls to an add-ons class/methods in the
-     *             switch or on the restore.
-     * - $modules
-     * - $shortcodes
-     * - $widgets
-     *
-     * @param boolean $hard             [deprecated]
-     * @param boolean $reinstantiate    whether to create new instances of EE_Registry's singletons too,
-     *                                  or just reset without re-instantiating (handy to set to FALSE if you're not
-     *                                  sure if you CAN currently reinstantiate the singletons at the moment)
-     * @param   bool  $reset_models     Defaults to true.  When false, then the models are not reset.  This is so
-     *                                  client
-     *                                  code instead can just change the model context to a different blog id if
-     *                                  necessary
-     * @return EE_Registry
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     */
-    public static function reset($hard = false, $reinstantiate = true, $reset_models = true)
-    {
-        $instance            = self::instance();
-        $instance->_cache_on = true;
-        // reset some "special" classes
-        EEH_Activation::reset();
-        $hard                     = apply_filters('FHEE__EE_Registry__reset__hard', $hard);
-        $instance->CFG            = EE_Config::reset($hard, $reinstantiate);
-        $instance->CART           = null;
-        $instance->MRM            = null;
-        $instance->AssetsRegistry = $instance->create('EventEspresso\core\services\assets\Registry');
-        //messages reset
-        EED_Messages::reset();
-        //handle of objects cached on LIB
-        foreach (array('LIB', 'modules') as $cache) {
-            foreach ($instance->{$cache} as $class_name => $class) {
-                if (self::_reset_and_unset_object($class, $reset_models)) {
-                    unset($instance->{$cache}->{$class_name});
-                }
-            }
-        }
-        return $instance;
-    }
-
-
-    /**
-     * if passed object implements ResettableInterface, then call it's reset() method
-     * if passed object implements InterminableInterface, then return false,
-     * to indicate that it should NOT be cleared from the Registry cache
-     *
-     * @param      $object
-     * @param bool $reset_models
-     * @return bool returns true if cached object should be unset
-     */
-    private static function _reset_and_unset_object($object, $reset_models)
-    {
-        if (! is_object($object)) {
-            // don't unset anything that's not an object
-            return false;
-        }
-        if ($object instanceof EED_Module) {
-            $object::reset();
-            // don't unset modules
-            return false;
-        }
-        if ($object instanceof ResettableInterface) {
-            if ($object instanceof EEM_Base) {
-                if ($reset_models) {
-                    $object->reset();
-                    return true;
-                }
-                return false;
-            }
-            $object->reset();
-            return true;
-        }
-        if (! $object instanceof InterminableInterface) {
-            return true;
-        }
-        return false;
-    }
-
-
-    /**
-     * Gets all the custom post type models defined
-     *
-     * @return array keys are model "short names" (Eg "Event") and keys are classnames (eg "EEM_Event")
-     */
-    public function cpt_models()
-    {
-        $cpt_models = array();
-        foreach ($this->non_abstract_db_models as $short_name => $classname) {
-            if (is_subclass_of($classname, 'EEM_CPT_Base')) {
-                $cpt_models[ $short_name ] = $classname;
-            }
-        }
-        return $cpt_models;
-    }
-
-
-    /**
-     * @return \EE_Config
-     */
-    public static function CFG()
-    {
-        return self::instance()->CFG;
-    }
-
-
-    /**
-     * @deprecated $VID:$
-     * @param string $class_name
-     * @return ReflectionClass
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     */
-    public function get_ReflectionClass($class_name)
-    {
-        return $this->mirror->getReflectionClass($class_name);
-    }
+	/**
+	 * @var EE_Registry $_instance
+	 */
+	private static $_instance;
+
+	/**
+	 * @var EE_Dependency_Map $_dependency_map
+	 */
+	protected $_dependency_map;
+
+	/**
+	 * @var Mirror
+	 */
+	private $mirror;
+
+	/**
+	 * @var ClassInterfaceCache $class_cache
+	 */
+	private $class_cache;
+
+	/**
+	 * @var array $_class_abbreviations
+	 */
+	protected $_class_abbreviations = array();
+
+	/**
+	 * @var CommandBusInterface $BUS
+	 */
+	public $BUS;
+
+	/**
+	 * @var EE_Cart $CART
+	 */
+	public $CART;
+
+	/**
+	 * @var EE_Config $CFG
+	 */
+	public $CFG;
+
+	/**
+	 * @var EE_Network_Config $NET_CFG
+	 */
+	public $NET_CFG;
+
+	/**
+	 * StdClass object for storing library classes in
+	 *
+	 * @var RegistryContainer $LIB
+	 */
+	public $LIB;
+
+	/**
+	 * @var EE_Request_Handler $REQ
+	 */
+	public $REQ;
+
+	/**
+	 * @var EE_Session $SSN
+	 */
+	public $SSN;
+
+	/**
+	 * @since 4.5.0
+	 * @var EE_Capabilities $CAP
+	 */
+	public $CAP;
+
+	/**
+	 * @since 4.9.0
+	 * @var EE_Message_Resource_Manager $MRM
+	 */
+	public $MRM;
+
+	/**
+	 * @var Registry $AssetsRegistry
+	 */
+	public $AssetsRegistry;
+
+	/**
+	 * StdClass object for holding addons which have registered themselves to work with EE core
+	 *
+	 * @var EE_Addon[] $addons
+	 */
+	public $addons;
+
+	/**
+	 * keys are 'short names' (eg Event), values are class names (eg 'EEM_Event')
+	 *
+	 * @var EEM_Base[] $models
+	 */
+	public $models = array();
+
+	/**
+	 * @var EED_Module[] $modules
+	 */
+	public $modules;
+
+	/**
+	 * @var EES_Shortcode[] $shortcodes
+	 */
+	public $shortcodes;
+
+	/**
+	 * @var WP_Widget[] $widgets
+	 */
+	public $widgets;
+
+	/**
+	 * this is an array of all implemented model names (i.e. not the parent abstract models, or models
+	 * which don't actually fetch items from the DB in the normal way (ie, are not children of EEM_Base)).
+	 * Keys are model "short names" (eg "Event") as used in model relations, and values are
+	 * classnames (eg "EEM_Event")
+	 *
+	 * @var array $non_abstract_db_models
+	 */
+	public $non_abstract_db_models = array();
+
+	/**
+	 * internationalization for JS strings
+	 *    usage:   EE_Registry::i18n_js_strings['string_key'] = esc_html__( 'string to translate.', 'event_espresso' );
+	 *    in js file:  var translatedString = eei18n.string_key;
+	 *
+	 * @var array $i18n_js_strings
+	 */
+	public static $i18n_js_strings = array();
+
+	/**
+	 * $main_file - path to espresso.php
+	 *
+	 * @var array $main_file
+	 */
+	public $main_file;
+
+	/**
+	 * array of ReflectionClass objects where the key is the class name
+	 *
+	 * @deprecated $VID:$
+	 * @var ReflectionClass[] $_reflectors
+	 */
+	public $_reflectors;
+
+	/**
+	 * boolean flag to indicate whether or not to load/save dependencies from/to the cache
+	 *
+	 * @var boolean $_cache_on
+	 */
+	protected $_cache_on = true;
+
+	/**
+	 * @var ObjectIdentifier
+	 */
+	private $object_identifier;
+
+
+	/**
+	 * @singleton method used to instantiate class object
+	 * @param EE_Dependency_Map|null   $dependency_map
+	 * @param Mirror|null              $mirror
+	 * @param ClassInterfaceCache|null $class_cache
+	 * @param ObjectIdentifier|null    $object_identifier
+	 * @return EE_Registry instance
+	 */
+	public static function instance(
+		EE_Dependency_Map $dependency_map = null,
+		Mirror $mirror = null,
+		ClassInterfaceCache $class_cache = null,
+		ObjectIdentifier $object_identifier = null
+	) {
+		// check if class object is instantiated
+		if (
+			! self::$_instance instanceof EE_Registry
+			&& $dependency_map instanceof EE_Dependency_Map
+			&& $mirror instanceof Mirror
+			&& $class_cache instanceof ClassInterfaceCache
+			&& $object_identifier instanceof ObjectIdentifier
+		) {
+			self::$_instance = new self(
+				$dependency_map,
+				$mirror,
+				$class_cache,
+				$object_identifier
+			);
+		}
+		return self::$_instance;
+	}
+
+
+	/**
+	 * protected constructor to prevent direct creation
+	 *
+	 * @Constructor
+	 * @param  EE_Dependency_Map  $dependency_map
+	 * @param Mirror              $mirror
+	 * @param ClassInterfaceCache $class_cache
+	 * @param ObjectIdentifier    $object_identifier
+	 */
+	protected function __construct(
+		EE_Dependency_Map $dependency_map,
+		Mirror $mirror,
+		ClassInterfaceCache $class_cache,
+		ObjectIdentifier $object_identifier
+	) {
+		$this->_dependency_map   = $dependency_map;
+		$this->mirror            = $mirror;
+		$this->class_cache       = $class_cache;
+		$this->object_identifier = $object_identifier;
+		// $registry_container = new RegistryContainer();
+		$this->LIB        = new RegistryContainer();
+		$this->addons     = new RegistryContainer();
+		$this->modules    = new RegistryContainer();
+		$this->shortcodes = new RegistryContainer();
+		$this->widgets    = new RegistryContainer();
+		add_action('EE_Load_Espresso_Core__handle_request__initialize_core_loading', array($this, 'initialize'));
+	}
+
+
+	/**
+	 * initialize
+	 *
+	 * @throws OutOfBoundsException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function initialize()
+	{
+		$this->_class_abbreviations = apply_filters(
+			'FHEE__EE_Registry____construct___class_abbreviations',
+			array(
+				'EE_Config'                                       => 'CFG',
+				'EE_Session'                                      => 'SSN',
+				'EE_Capabilities'                                 => 'CAP',
+				'EE_Cart'                                         => 'CART',
+				'EE_Network_Config'                               => 'NET_CFG',
+				'EE_Request_Handler'                              => 'REQ',
+				'EE_Message_Resource_Manager'                     => 'MRM',
+				'EventEspresso\core\services\commands\CommandBus' => 'BUS',
+				'EventEspresso\core\services\assets\Registry'     => 'AssetsRegistry',
+			)
+		);
+		$this->load_core('Base', array(), true);
+		// add our request and response objects to the cache
+		$request_loader = $this->_dependency_map->class_loader(
+			'EventEspresso\core\services\request\Request'
+		);
+		$this->_set_cached_class(
+			$request_loader(),
+			'EventEspresso\core\services\request\Request'
+		);
+		$response_loader = $this->_dependency_map->class_loader(
+			'EventEspresso\core\services\request\Response'
+		);
+		$this->_set_cached_class(
+			$response_loader(),
+			'EventEspresso\core\services\request\Response'
+		);
+		add_action('AHEE__EE_System__set_hooks_for_core', array($this, 'init'));
+	}
+
+
+	/**
+	 * @return void
+	 */
+	public function init()
+	{
+		// Get current page protocol
+		$protocol = isset($_SERVER['HTTPS']) ? 'https://' : 'http://';
+		// Output admin-ajax.php URL with same protocol as current page
+		self::$i18n_js_strings['ajax_url'] = admin_url('admin-ajax.php', $protocol);
+		self::$i18n_js_strings['wp_debug'] = defined('WP_DEBUG') ? WP_DEBUG : false;
+	}
+
+
+	/**
+	 * localize_i18n_js_strings
+	 *
+	 * @return string
+	 */
+	public static function localize_i18n_js_strings()
+	{
+		$i18n_js_strings = (array) self::$i18n_js_strings;
+		foreach ($i18n_js_strings as $key => $value) {
+			if (is_scalar($value)) {
+				$i18n_js_strings[ $key ] = html_entity_decode((string) $value, ENT_QUOTES, 'UTF-8');
+			}
+		}
+		return '/* <![CDATA[ */ var eei18n = ' . wp_json_encode($i18n_js_strings) . '; /* ]]> */';
+	}
+
+
+	/**
+	 * @param mixed string | EED_Module $module
+	 * @throws OutOfBoundsException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function add_module($module)
+	{
+		if ($module instanceof EED_Module) {
+			$module_class                   = get_class($module);
+			$this->modules->{$module_class} = $module;
+		} else {
+			if (! class_exists('EE_Module_Request_Router', false)) {
+				$this->load_core('Module_Request_Router');
+			}
+			EE_Module_Request_Router::module_factory($module);
+		}
+	}
+
+
+	/**
+	 * @param string $module_name
+	 * @return mixed EED_Module | NULL
+	 */
+	public function get_module($module_name = '')
+	{
+		return isset($this->modules->{$module_name})
+			? $this->modules->{$module_name}
+			: null;
+	}
+
+
+	/**
+	 * loads core classes - must be singletons
+	 *
+	 * @param string $class_name - simple class name ie: session
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @return mixed
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_core($class_name, $arguments = array(), $load_only = false)
+	{
+		$core_paths = apply_filters(
+			'FHEE__EE_Registry__load_core__core_paths',
+			array(
+				EE_CORE,
+				EE_ADMIN,
+				EE_CPTS,
+				EE_CORE . 'data_migration_scripts' . DS,
+				EE_CORE . 'capabilities' . DS,
+				EE_CORE . 'request_stack' . DS,
+				EE_CORE . 'middleware' . DS,
+			)
+		);
+		// retrieve instantiated class
+		return $this->_load(
+			$core_paths,
+			'EE_',
+			$class_name,
+			'core',
+			$arguments,
+			false,
+			true,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * loads service classes
+	 *
+	 * @param string $class_name - simple class name ie: session
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @return mixed
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_service($class_name, $arguments = array(), $load_only = false)
+	{
+		$service_paths = apply_filters(
+			'FHEE__EE_Registry__load_service__service_paths',
+			array(
+				EE_CORE . 'services' . DS,
+			)
+		);
+		// retrieve instantiated class
+		return $this->_load(
+			$service_paths,
+			'EE_',
+			$class_name,
+			'class',
+			$arguments,
+			false,
+			true,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * loads data_migration_scripts
+	 *
+	 * @param string $class_name - class name for the DMS ie: EE_DMS_Core_4_2_0
+	 * @param mixed  $arguments
+	 * @return EE_Data_Migration_Script_Base|mixed
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_dms($class_name, $arguments = array())
+	{
+		// retrieve instantiated class
+		return $this->_load(
+			EE_Data_Migration_Manager::instance()->get_data_migration_script_folders(),
+			'EE_DMS_',
+			$class_name,
+			'dms',
+			$arguments,
+			false,
+			false
+		);
+	}
+
+
+	/**
+	 * loads object creating classes - must be singletons
+	 *
+	 * @param string $class_name - simple class name ie: attendee
+	 * @param mixed  $arguments  - an array of arguments to pass to the class
+	 * @param bool   $from_db    - some classes are instantiated from the db and thus call a different method to
+	 *                           instantiate
+	 * @param bool   $cache      if you don't want the class to be stored in the internal cache (non-persistent) then
+	 *                           set this to FALSE (ie. when instantiating model objects from client in a loop)
+	 * @param bool   $load_only  whether or not to just load the file and NOT instantiate, or load AND instantiate
+	 *                           (default)
+	 * @return EE_Base_Class | bool
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_class($class_name, $arguments = array(), $from_db = false, $cache = true, $load_only = false)
+	{
+		$paths = apply_filters(
+			'FHEE__EE_Registry__load_class__paths', array(
+				EE_CORE,
+				EE_CLASSES,
+				EE_BUSINESS,
+			)
+		);
+		// retrieve instantiated class
+		return $this->_load(
+			$paths,
+			'EE_',
+			$class_name,
+			'class',
+			$arguments,
+			$from_db,
+			$cache,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * loads helper classes - must be singletons
+	 *
+	 * @param string $class_name - simple class name ie: price
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @return EEH_Base | bool
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_helper($class_name, $arguments = array(), $load_only = true)
+	{
+		// todo: add doing_it_wrong() in a few versions after all addons have had calls to this method removed
+		$helper_paths = apply_filters('FHEE__EE_Registry__load_helper__helper_paths', array(EE_HELPERS));
+		// retrieve instantiated class
+		return $this->_load(
+			$helper_paths,
+			'EEH_',
+			$class_name,
+			'helper',
+			$arguments,
+			false,
+			true,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * loads core classes - must be singletons
+	 *
+	 * @param string $class_name - simple class name ie: session
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @param bool   $cache      whether to cache the object or not.
+	 * @return mixed
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_lib($class_name, $arguments = array(), $load_only = false, $cache = true)
+	{
+		$paths = array(
+			EE_LIBRARIES,
+			EE_LIBRARIES . 'messages' . DS,
+			EE_LIBRARIES . 'shortcodes' . DS,
+			EE_LIBRARIES . 'qtips' . DS,
+			EE_LIBRARIES . 'payment_methods' . DS,
+		);
+		// retrieve instantiated class
+		return $this->_load(
+			$paths,
+			'EE_',
+			$class_name,
+			'lib',
+			$arguments,
+			false,
+			$cache,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * loads model classes - must be singletons
+	 *
+	 * @param string $class_name - simple class name ie: price
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @return EEM_Base | bool
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_model($class_name, $arguments = array(), $load_only = false)
+	{
+		$paths = apply_filters(
+			'FHEE__EE_Registry__load_model__paths', array(
+				EE_MODELS,
+				EE_CORE,
+			)
+		);
+		// retrieve instantiated class
+		return $this->_load(
+			$paths,
+			'EEM_',
+			$class_name,
+			'model',
+			$arguments,
+			false,
+			true,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * loads model classes - must be singletons
+	 *
+	 * @param string $class_name - simple class name ie: price
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @return mixed | bool
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_model_class($class_name, $arguments = array(), $load_only = true)
+	{
+		$paths = array(
+			EE_MODELS . 'fields' . DS,
+			EE_MODELS . 'helpers' . DS,
+			EE_MODELS . 'relations' . DS,
+			EE_MODELS . 'strategies' . DS,
+		);
+		// retrieve instantiated class
+		return $this->_load(
+			$paths,
+			'EE_',
+			$class_name,
+			'',
+			$arguments,
+			false,
+			true,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * Determines if $model_name is the name of an actual EE model.
+	 *
+	 * @param string $model_name like Event, Attendee, Question_Group_Question, etc.
+	 * @return boolean
+	 */
+	public function is_model_name($model_name)
+	{
+		return isset($this->models[ $model_name ]);
+	}
+
+
+	/**
+	 * generic class loader
+	 *
+	 * @param string $path_to_file - directory path to file location, not including filename
+	 * @param string $file_name    - file name  ie:  my_file.php, including extension
+	 * @param string $type         - file type - core? class? helper? model?
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @return mixed
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_file($path_to_file, $file_name, $type = '', $arguments = array(), $load_only = true)
+	{
+		// retrieve instantiated class
+		return $this->_load(
+			$path_to_file,
+			'',
+			$file_name,
+			$type,
+			$arguments,
+			false,
+			true,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * @param string $path_to_file - directory path to file location, not including filename
+	 * @param string $class_name   - full class name  ie:  My_Class
+	 * @param string $type         - file type - core? class? helper? model?
+	 * @param mixed  $arguments
+	 * @param bool   $load_only
+	 * @return bool|EE_Addon|object
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function load_addon($path_to_file, $class_name, $type = 'class', $arguments = array(), $load_only = false)
+	{
+		// retrieve instantiated class
+		return $this->_load(
+			$path_to_file,
+			'addon',
+			$class_name,
+			$type,
+			$arguments,
+			false,
+			true,
+			$load_only
+		);
+	}
+
+
+	/**
+	 * instantiates, caches, and automatically resolves dependencies
+	 * for classes that use a Fully Qualified Class Name.
+	 * if the class is not capable of being loaded using PSR-4 autoloading,
+	 * then you need to use one of the existing load_*() methods
+	 * which can resolve the classname and filepath from the passed arguments
+	 *
+	 * @param bool|string $class_name   Fully Qualified Class Name
+	 * @param array       $arguments    an argument, or array of arguments to pass to the class upon instantiation
+	 * @param bool        $cache        whether to cache the instantiated object for reuse
+	 * @param bool        $from_db      some classes are instantiated from the db
+	 *                                  and thus call a different method to instantiate
+	 * @param bool        $load_only    if true, will only load the file, but will NOT instantiate an object
+	 * @param bool|string $addon        if true, will cache the object in the EE_Registry->$addons array
+	 * @return bool|null|mixed          null = failure to load or instantiate class object.
+	 *                                  object = class loaded and instantiated successfully.
+	 *                                  bool = fail or success when $load_only is true
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public function create(
+		$class_name = false,
+		$arguments = array(),
+		$cache = false,
+		$from_db = false,
+		$load_only = false,
+		$addon = false
+	) {
+		$class_name   = ltrim($class_name, '\\');
+		$class_name   = $this->class_cache->getFqnForAlias($class_name);
+		$class_exists = $this->loadOrVerifyClassExists($class_name, $arguments);
+		// if a non-FQCN was passed, then
+		// verifyClassExists() might return an object
+		// or it could return null if the class just could not be found anywhere
+		if ($class_exists instanceof $class_name || $class_exists === null) {
+			// either way, return the results
+			return $class_exists;
+		}
+		$class_name = $class_exists;
+		// if we're only loading the class and it already exists, then let's just return true immediately
+		if ($load_only) {
+			return true;
+		}
+		$addon = $addon ? 'addon' : '';
+		// $this->_cache_on is toggled during the recursive loading that can occur with dependency injection
+		// $cache is controlled by individual calls to separate Registry loader methods like load_class()
+		// $load_only is also controlled by individual calls to separate Registry loader methods like load_file()
+		if ($this->_cache_on && $cache && ! $load_only) {
+			// return object if it's already cached
+			$cached_class = $this->_get_cached_class($class_name, $addon, $arguments);
+			if ($cached_class !== null) {
+				return $cached_class;
+			}
+		}// obtain the loader method from the dependency map
+		$loader = $this->_dependency_map->class_loader($class_name);// instantiate the requested object
+		if ($loader instanceof Closure) {
+			$class_obj = $loader($arguments);
+		} else {
+			if ($loader && method_exists($this, $loader)) {
+				$class_obj = $this->{$loader}($class_name, $arguments);
+			} else {
+				$class_obj = $this->_create_object($class_name, $arguments, $addon, $from_db);
+			}
+		}
+		if (($this->_cache_on && $cache) || $this->get_class_abbreviation($class_name, '')) {
+			// save it for later... kinda like gum  { : $
+			$this->_set_cached_class(
+				$class_obj,
+				$class_name,
+				$addon,
+				$from_db,
+				$arguments
+			);
+		}
+		$this->_cache_on = true;
+		return $class_obj;
+	}
+
+
+	/**
+	 * Recursively checks that a class exists and potentially attempts to load classes with non-FQCNs
+	 *
+	 * @param string|object $class_name
+	 * @param array         $arguments
+	 * @param int           $attempt
+	 * @return mixed
+	 */
+	private function loadOrVerifyClassExists($class_name, array $arguments, $attempt = 1)
+	{
+		if (is_object($class_name) || class_exists($class_name)) {
+			return $class_name;
+		}
+		switch ($attempt) {
+			case 1:
+				// if it's a FQCN then maybe the class is registered with a preceding \
+				$class_name = strpos($class_name, '\\') !== false
+					? '\\' . ltrim($class_name, '\\')
+					: $class_name;
+				break;
+			case 2:
+				//
+				$loader = $this->_dependency_map->class_loader($class_name);
+				if ($loader && method_exists($this, $loader)) {
+					return $this->{$loader}($class_name, $arguments);
+				}
+				break;
+			case 3:
+			default;
+				return null;
+		}
+		$attempt++;
+		return $this->loadOrVerifyClassExists($class_name, $arguments, $attempt);
+	}
+
+
+	/**
+	 * instantiates, caches, and injects dependencies for classes
+	 *
+	 * @param array       $file_paths   an array of paths to folders to look in
+	 * @param string      $class_prefix EE  or EEM or... ???
+	 * @param bool|string $class_name   $class name
+	 * @param string      $type         file type - core? class? helper? model?
+	 * @param mixed       $arguments    an argument or array of arguments to pass to the class upon instantiation
+	 * @param bool        $from_db      some classes are instantiated from the db
+	 *                                  and thus call a different method to instantiate
+	 * @param bool        $cache        whether to cache the instantiated object for reuse
+	 * @param bool        $load_only    if true, will only load the file, but will NOT instantiate an object
+	 * @return bool|null|object null = failure to load or instantiate class object.
+	 *                                  object = class loaded and instantiated successfully.
+	 *                                  bool = fail or success when $load_only is true
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidArgumentException
+	 */
+	protected function _load(
+		$file_paths = array(),
+		$class_prefix = 'EE_',
+		$class_name = false,
+		$type = 'class',
+		$arguments = array(),
+		$from_db = false,
+		$cache = true,
+		$load_only = false
+	) {
+		$class_name = ltrim($class_name, '\\');
+		// strip php file extension
+		$class_name = str_replace('.php', '', trim($class_name));
+		// does the class have a prefix ?
+		if (! empty($class_prefix) && $class_prefix !== 'addon') {
+			// make sure $class_prefix is uppercase
+			$class_prefix = strtoupper(trim($class_prefix));
+			// add class prefix ONCE!!!
+			$class_name = $class_prefix . str_replace($class_prefix, '', $class_name);
+		}
+		$class_name   = $this->class_cache->getFqnForAlias($class_name);
+		$class_exists = class_exists($class_name, false);
+		// if we're only loading the class and it already exists, then let's just return true immediately
+		if ($load_only && $class_exists) {
+			return true;
+		}
+		// $this->_cache_on is toggled during the recursive loading that can occur with dependency injection
+		// $cache is controlled by individual calls to separate Registry loader methods like load_class()
+		// $load_only is also controlled by individual calls to separate Registry loader methods like load_file()
+		if ($this->_cache_on && $cache && ! $load_only) {
+			// return object if it's already cached
+			$cached_class = $this->_get_cached_class($class_name, $class_prefix, $arguments);
+			if ($cached_class !== null) {
+				return $cached_class;
+			}
+		}
+		// if the class doesn't already exist.. then we need to try and find the file and load it
+		if (! $class_exists) {
+			// get full path to file
+			$path = $this->_resolve_path($class_name, $type, $file_paths);
+			// load the file
+			$loaded = $this->_require_file($path, $class_name, $type, $file_paths);
+			// if we are only loading a file but NOT instantiating an object
+			// then return boolean for whether class was loaded or not
+			if ($load_only) {
+				return $loaded;
+			}
+			// if an object was expected but loading failed, then return nothing
+			if (! $loaded) {
+				return null;
+			}
+		}
+		// instantiate the requested object
+		$class_obj = $this->_create_object($class_name, $arguments, $type, $from_db);
+		if ($this->_cache_on && $cache) {
+			// save it for later... kinda like gum  { : $
+			$this->_set_cached_class(
+				$class_obj,
+				$class_name,
+				$class_prefix,
+				$from_db,
+				$arguments
+			);
+		}
+		$this->_cache_on = true;
+		return $class_obj;
+	}
+
+
+	/**
+	 * @param string $class_name
+	 * @param string $default have to specify something, but not anything that will conflict
+	 * @return mixed|string
+	 */
+	protected function get_class_abbreviation($class_name, $default = 'FANCY_BATMAN_PANTS')
+	{
+		return isset($this->_class_abbreviations[ $class_name ])
+			? $this->_class_abbreviations[ $class_name ]
+			: $default;
+	}
+
+
+	/**
+	 * attempts to find a cached version of the requested class
+	 * by looking in the following places:
+	 *        $this->{$class_abbreviation}            ie:    $this->CART
+	 *        $this->{$class_name}                        ie:    $this->Some_Class
+	 *        $this->LIB->{$class_name}                ie:    $this->LIB->Some_Class
+	 *        $this->addon->{$class_name}    ie:    $this->addon->Some_Addon_Class
+	 *
+	 * @param string $class_name
+	 * @param string $class_prefix
+	 * @param array  $arguments
+	 * @return mixed
+	 */
+	protected function _get_cached_class(
+		$class_name,
+		$class_prefix = '',
+		$arguments = array()
+	) {
+		if ($class_name === 'EE_Registry') {
+			return $this;
+		}
+		$class_abbreviation = $this->get_class_abbreviation($class_name);
+		// check if class has already been loaded, and return it if it has been
+		if (isset($this->{$class_abbreviation})) {
+			return $this->{$class_abbreviation};
+		}
+		$class_name = str_replace('\\', '_', $class_name);
+		if (isset ($this->{$class_name})) {
+			return $this->{$class_name};
+		}
+		if ($class_prefix === 'addon' && isset ($this->addons->{$class_name})) {
+			return $this->addons->{$class_name};
+		}
+		$object_identifier = $this->object_identifier->getIdentifier($class_name, $arguments);
+		if (isset($this->LIB->{$object_identifier})) {
+			return $this->LIB->{$object_identifier};
+		}
+		foreach ($this->LIB as $key => $object) {
+			if (
+				// request does not contain new arguments and therefore no args identifier
+				! $this->object_identifier->hasArguments($object_identifier)
+				// but previously cached class with args was found
+				&& $this->object_identifier->fqcnMatchesObjectIdentifier($class_name, $key)
+			) {
+				return $object;
+			}
+		}
+		return null;
+	}
+
+
+	/**
+	 * removes a cached version of the requested class
+	 *
+	 * @param string  $class_name
+	 * @param boolean $addon
+	 * @param array   $arguments
+	 * @return boolean
+	 */
+	public function clear_cached_class(
+		$class_name,
+		$addon = false,
+		$arguments = array()
+	) {
+		$class_abbreviation = $this->get_class_abbreviation($class_name);
+		// check if class has already been loaded, and return it if it has been
+		if (isset($this->{$class_abbreviation})) {
+			$this->{$class_abbreviation} = null;
+			return true;
+		}
+		$class_name = str_replace('\\', '_', $class_name);
+		if (isset($this->{$class_name})) {
+			$this->{$class_name} = null;
+			return true;
+		}
+		if ($addon && isset($this->addons->{$class_name})) {
+			unset($this->addons->{$class_name});
+			return true;
+		}
+		$class_name = $this->object_identifier->getIdentifier($class_name, $arguments);
+		if (isset($this->LIB->{$class_name})) {
+			unset($this->LIB->{$class_name});
+			return true;
+		}
+		return false;
+	}
+
+
+	/**
+	 * _set_cached_class
+	 * attempts to cache the instantiated class locally
+	 * in one of the following places, in the following order:
+	 *        $this->{class_abbreviation}   ie:    $this->CART
+	 *        $this->{$class_name}          ie:    $this->Some_Class
+	 *        $this->addon->{$$class_name}    ie:    $this->addon->Some_Addon_Class
+	 *        $this->LIB->{$class_name}     ie:    $this->LIB->Some_Class
+	 *
+	 * @param object $class_obj
+	 * @param string $class_name
+	 * @param string $class_prefix
+	 * @param bool   $from_db
+	 * @param array  $arguments
+	 * @return void
+	 */
+	protected function _set_cached_class(
+		$class_obj,
+		$class_name,
+		$class_prefix = '',
+		$from_db = false,
+		$arguments = array()
+	) {
+		if ($class_name === 'EE_Registry' || empty($class_obj)) {
+			return;
+		}
+		// return newly instantiated class
+		$class_abbreviation = $this->get_class_abbreviation($class_name, '');
+		if ($class_abbreviation) {
+			$this->{$class_abbreviation} = $class_obj;
+			return;
+		}
+		$class_name = str_replace('\\', '_', $class_name);
+		if (property_exists($this, $class_name)) {
+			$this->{$class_name} = $class_obj;
+			return;
+		}
+		if ($class_prefix === 'addon') {
+			$this->addons->{$class_name} = $class_obj;
+			return;
+		}
+		if (! $from_db) {
+			$class_name               = $this->object_identifier->getIdentifier($class_name, $arguments);
+			$this->LIB->{$class_name} = $class_obj;
+		}
+	}
+
+
+	/**
+	 * attempts to find a full valid filepath for the requested class.
+	 * loops thru each of the base paths in the $file_paths array and appends : "{classname} . {file type} . php"
+	 * then returns that path if the target file has been found and is readable
+	 *
+	 * @param string $class_name
+	 * @param string $type
+	 * @param array  $file_paths
+	 * @return string | bool
+	 */
+	protected function _resolve_path($class_name, $type = '', $file_paths = array())
+	{
+		// make sure $file_paths is an array
+		$file_paths = is_array($file_paths)
+			? $file_paths
+			: array($file_paths);
+		// cycle thru paths
+		foreach ($file_paths as $key => $file_path) {
+			// convert all separators to proper DS, if no filepath, then use EE_CLASSES
+			$file_path = $file_path
+				? str_replace(array('/', '\\'), DS, $file_path)
+				: EE_CLASSES;
+			// prep file type
+			$type = ! empty($type)
+				? trim($type, '.') . '.'
+				: '';
+			// build full file path
+			$file_paths[ $key ] = rtrim($file_path, DS) . DS . $class_name . '.' . $type . 'php';
+			//does the file exist and can be read ?
+			if (is_readable($file_paths[ $key ])) {
+				return $file_paths[ $key ];
+			}
+		}
+		return false;
+	}
+
+
+	/**
+	 * basically just performs a require_once()
+	 * but with some error handling
+	 *
+	 * @param  string $path
+	 * @param  string $class_name
+	 * @param  string $type
+	 * @param  array  $file_paths
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _require_file($path, $class_name, $type = '', $file_paths = array())
+	{
+		$this->resolve_legacy_class_parent($class_name);
+		// don't give up! you gotta...
+		try {
+			//does the file exist and can it be read ?
+			if (! $path) {
+				// just in case the file has already been autoloaded,
+				// but discrepancies in the naming schema are preventing it from
+				// being loaded via one of the EE_Registry::load_*() methods,
+				// then let's try one last hail mary before throwing an exception
+				// and call class_exists() again, but with autoloading turned ON
+				if (class_exists($class_name)) {
+					return true;
+				}
+				// so sorry, can't find the file
+				throw new EE_Error (
+					sprintf(
+						esc_html__(
+							'The %1$s file %2$s could not be located or is not readable due to file permissions. Please ensure that the following filepath(s) are correct: %3$s',
+							'event_espresso'
+						),
+						trim($type, '.'),
+						$class_name,
+						'<br />' . implode(',<br />', $file_paths)
+					)
+				);
+			}
+			// get the file
+			require_once($path);
+			// if the class isn't already declared somewhere
+			if (class_exists($class_name, false) === false) {
+				// so sorry, not a class
+				throw new EE_Error(
+					sprintf(
+						esc_html__(
+							'The %s file %s does not appear to contain the %s Class.',
+							'event_espresso'
+						),
+						$type,
+						$path,
+						$class_name
+					)
+				);
+			}
+		} catch (EE_Error $e) {
+			$e->get_error();
+			return false;
+		}
+		return true;
+	}
+
+
+	/**
+	 * Some of our legacy classes that extended a parent class would simply use a require() statement
+	 * before their class declaration in order to ensure that the parent class was loaded.
+	 * This is not ideal, but it's nearly impossible to determine the parent class of a non-namespaced class,
+	 * without triggering a fatal error because the parent class has yet to be loaded and therefore doesn't exist.
+	 *
+	 * @param string $class_name
+	 */
+	protected function resolve_legacy_class_parent($class_name = '')
+	{
+		try {
+			$legacy_parent_class_map = array(
+				'EE_Payment_Processor' => 'core/business/EE_Processor_Base.class.php',
+			);
+			if (isset($legacy_parent_class_map[ $class_name ])) {
+				require_once EE_PLUGIN_DIR_PATH . $legacy_parent_class_map[ $class_name ];
+			}
+		} catch (Exception $exception) {
+		}
+	}
+
+
+	/**
+	 * _create_object
+	 * Attempts to instantiate the requested class via any of the
+	 * commonly used instantiation methods employed throughout EE.
+	 * The priority for instantiation is as follows:
+	 *        - abstract classes or any class flagged as "load only" (no instantiation occurs)
+	 *        - model objects via their 'new_instance_from_db' method
+	 *        - model objects via their 'new_instance' method
+	 *        - "singleton" classes" via their 'instance' method
+	 *    - standard instantiable classes via their __constructor
+	 * Prior to instantiation, if the classname exists in the dependency_map,
+	 * then the constructor for the requested class will be examined to determine
+	 * if any dependencies exist, and if they can be injected.
+	 * If so, then those classes will be added to the array of arguments passed to the constructor
+	 *
+	 * @param string $class_name
+	 * @param array  $arguments
+	 * @param string $type
+	 * @param bool   $from_db
+	 * @return null|object|bool
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 */
+	protected function _create_object($class_name, $arguments = array(), $type = '', $from_db = false)
+	{
+		// create reflection
+		$reflector = $this->mirror->getReflectionClass($class_name);
+		// make sure arguments are an array
+		$arguments = is_array($arguments)
+			? $arguments
+			: array($arguments);
+		// and if arguments array is numerically and sequentially indexed, then we want it to remain as is,
+		// else wrap it in an additional array so that it doesn't get split into multiple parameters
+		$arguments = $this->_array_is_numerically_and_sequentially_indexed($arguments)
+			? $arguments
+			: array($arguments);
+		// attempt to inject dependencies ?
+		if ($this->_dependency_map->has($class_name)) {
+			$arguments = $this->_resolve_dependencies($reflector, $class_name, $arguments);
+		}
+		// instantiate the class if possible
+		if ($reflector->isAbstract()) {
+			// nothing to instantiate, loading file was enough
+			// does not throw an exception so $instantiation_mode is unused
+			// $instantiation_mode = "1) no constructor abstract class";
+			return true;
+		}
+		if (
+			empty($arguments)
+			&& $this->mirror->getConstructorFromReflection($reflector) === null
+			&& $reflector->isInstantiable()
+		) {
+			// no constructor = static methods only... nothing to instantiate, loading file was enough
+			// $instantiation_mode = "2) no constructor but instantiable";
+			return $reflector->newInstance();
+		}
+		if ($from_db && method_exists($class_name, 'new_instance_from_db')) {
+			// $instantiation_mode = "3) new_instance_from_db()";
+			return call_user_func_array(array($class_name, 'new_instance_from_db'), $arguments);
+		}
+		if (method_exists($class_name, 'new_instance')) {
+			// $instantiation_mode = "4) new_instance()";
+			return call_user_func_array(array($class_name, 'new_instance'), $arguments);
+		}
+		if (method_exists($class_name, 'instance')) {
+			// $instantiation_mode = "5) instance()";
+			return call_user_func_array(array($class_name, 'instance'), $arguments);
+		}
+		if ($reflector->isInstantiable()) {
+			// $instantiation_mode = "6) constructor";
+			return $reflector->newInstanceArgs($arguments);
+		}
+		// heh ? something's not right !
+		throw new EE_Error(
+			sprintf(
+				__('The %s file %s could not be instantiated.', 'event_espresso'),
+				$type,
+				$class_name
+			)
+		);
+	}
+
+
+	/**
+	 * @see http://stackoverflow.com/questions/173400/how-to-check-if-php-array-is-associative-or-sequential
+	 * @param array $array
+	 * @return bool
+	 */
+	protected function _array_is_numerically_and_sequentially_indexed(array $array)
+	{
+		return ! empty($array)
+			? array_keys($array) === range(0, count($array) - 1)
+			: true;
+	}
+
+
+	/**
+	 * _resolve_dependencies
+	 * examines the constructor for the requested class to determine
+	 * if any dependencies exist, and if they can be injected.
+	 * If so, then those classes will be added to the array of arguments passed to the constructor
+	 * PLZ NOTE: this is achieved by type hinting the constructor params
+	 * For example:
+	 *        if attempting to load a class "Foo" with the following constructor:
+	 *        __construct( Bar $bar_class, Fighter $grohl_class )
+	 *        then $bar_class and $grohl_class will be added to the $arguments array,
+	 *        but only IF they are NOT already present in the incoming arguments array,
+	 *        and the correct classes can be loaded
+	 *
+	 * @param ReflectionClass $reflector
+	 * @param string          $class_name
+	 * @param array           $arguments
+	 * @return array
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _resolve_dependencies(ReflectionClass $reflector, $class_name, array $arguments = array())
+	{
+		// let's examine the constructor
+		$constructor = $this->mirror->getConstructorFromReflection($reflector);
+		// whu? huh? nothing?
+		if (! $constructor) {
+			return $arguments;
+		}
+		// get constructor parameters
+		$params = $this->mirror->getParametersFromReflection($reflector);
+		// and the keys for the incoming arguments array so that we can compare existing arguments with what is expected
+		$argument_keys = array_keys($arguments);
+		// now loop thru all of the constructors expected parameters
+		foreach ($params as $index => $param) {
+			// is this a dependency for a specific class ?
+			$param_class = $this->mirror->getParameterClassName($param, $class_name, $index);
+			// BUT WAIT !!! This class may be an alias for something else (or getting replaced at runtime)
+			$param_class = $this->class_cache->isAlias($param_class, $class_name)
+				? $this->class_cache->getFqnForAlias($param_class, $class_name)
+				: $param_class;
+			if (
+				// param is not even a class
+				$param_class === null
+				// and something already exists in the incoming arguments for this param
+				&& array_key_exists($index, $argument_keys)
+				&& array_key_exists($argument_keys[ $index ], $arguments)
+			) {
+				// so let's skip this argument and move on to the next
+				continue;
+			}
+			if (
+				// parameter is type hinted as a class, exists as an incoming argument, AND it's the correct class
+				$param_class !== null
+				&& isset($argument_keys[ $index ], $arguments[ $argument_keys[ $index ] ])
+				&& $arguments[ $argument_keys[ $index ] ] instanceof $param_class
+			) {
+				// skip this argument and move on to the next
+				continue;
+			}
+			if (
+				// parameter is type hinted as a class, and should be injected
+				$param_class !== null
+				&& $this->_dependency_map->has_dependency_for_class($class_name, $param_class)
+			) {
+				$arguments = $this->_resolve_dependency(
+					$class_name,
+					$param_class,
+					$arguments,
+					$index
+				);
+			} else {
+				$arguments[ $index ] = $this->mirror->getParameterDefaultValue(
+					$param,
+					$class_name,
+					$index
+				);
+			}
+		}
+		return $arguments;
+	}
+
+
+	/**
+	 * @param string $class_name
+	 * @param string $param_class
+	 * @param array  $arguments
+	 * @param mixed  $index
+	 * @return array
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 */
+	protected function _resolve_dependency($class_name, $param_class, $arguments, $index)
+	{
+		$dependency = null;
+		// should dependency be loaded from cache ?
+		$cache_on = $this->_dependency_map->loading_strategy_for_class_dependency(
+			$class_name,
+			$param_class
+		);
+		$cache_on = $cache_on !== EE_Dependency_Map::load_new_object;
+		// we might have a dependency...
+		// let's MAYBE try and find it in our cache if that's what's been requested
+		$cached_class = $cache_on
+			? $this->_get_cached_class($param_class)
+			: null;
+		// and grab it if it exists
+		if ($cached_class instanceof $param_class) {
+			$dependency = $cached_class;
+		} elseif ($param_class !== $class_name) {
+			// obtain the loader method from the dependency map
+			$loader = $this->_dependency_map->class_loader($param_class);
+			// is loader a custom closure ?
+			if ($loader instanceof Closure) {
+				$dependency = $loader($arguments);
+			} else {
+				// set the cache on property for the recursive loading call
+				$this->_cache_on = $cache_on;
+				// if not, then let's try and load it via the registry
+				if ($loader && method_exists($this, $loader)) {
+					$dependency = $this->{$loader}($param_class);
+				} else {
+					$dependency = LoaderFactory::getLoader()->load(
+						$param_class,
+						array(),
+						$cache_on
+					);
+				}
+			}
+		}
+		// did we successfully find the correct dependency ?
+		if ($dependency instanceof $param_class) {
+			// then let's inject it into the incoming array of arguments at the correct location
+			$arguments[ $index ] = $dependency;
+		}
+		return $arguments;
+	}
+
+
+	/**
+	 * call any loader that's been registered in the EE_Dependency_Map::$_class_loaders array
+	 *
+	 * @param string $classname PLEASE NOTE: the class name needs to match what's registered
+	 *                          in the EE_Dependency_Map::$_class_loaders array,
+	 *                          including the class prefix, ie: "EE_", "EEM_", "EEH_", etc
+	 * @param array  $arguments
+	 * @return object
+	 */
+	public static function factory($classname, $arguments = array())
+	{
+		$loader = self::instance()->_dependency_map->class_loader($classname);
+		if ($loader instanceof Closure) {
+			return $loader($arguments);
+		}
+		if (method_exists(self::instance(), $loader)) {
+			return self::instance()->{$loader}($classname, $arguments);
+		}
+		return null;
+	}
+
+
+	/**
+	 * Gets the addon by its class name
+	 *
+	 * @param string $class_name
+	 * @return EE_Addon
+	 */
+	public function getAddon($class_name)
+	{
+		$class_name = str_replace('\\', '_', $class_name);
+		return $this->addons->{$class_name};
+	}
+
+
+	/**
+	 * removes the addon from the internal cache
+	 *
+	 * @param string $class_name
+	 * @return void
+	 */
+	public function removeAddon($class_name)
+	{
+		$class_name = str_replace('\\', '_', $class_name);
+		unset($this->addons->{$class_name});
+	}
+
+
+	/**
+	 * Gets the addon by its name/slug (not classname. For that, just
+	 * use the get_addon() method above
+	 *
+	 * @param string $name
+	 * @return EE_Addon
+	 */
+	public function get_addon_by_name($name)
+	{
+		foreach ($this->addons as $addon) {
+			if ($addon->name() === $name) {
+				return $addon;
+			}
+		}
+		return null;
+	}
+
+
+	/**
+	 * Gets an array of all the registered addons, where the keys are their names.
+	 * (ie, what each returns for their name() function)
+	 * They're already available on EE_Registry::instance()->addons as properties,
+	 * where each property's name is the addon's classname,
+	 * So if you just want to get the addon by classname,
+	 * OR use the get_addon() method above.
+	 * PLEASE  NOTE:
+	 * addons with Fully Qualified Class Names
+	 * have had the namespace separators converted to underscores,
+	 * so a classname like Fully\Qualified\ClassName
+	 * would have been converted to Fully_Qualified_ClassName
+	 *
+	 * @return EE_Addon[] where the KEYS are the addon's name()
+	 */
+	public function get_addons_by_name()
+	{
+		$addons = array();
+		foreach ($this->addons as $addon) {
+			$addons[ $addon->name() ] = $addon;
+		}
+		return $addons;
+	}
+
+
+	/**
+	 * Resets the specified model's instance AND makes sure EE_Registry doesn't keep
+	 * a stale copy of it around
+	 *
+	 * @param string $model_name
+	 * @return \EEM_Base
+	 * @throws \EE_Error
+	 */
+	public function reset_model($model_name)
+	{
+		$model_class_name = strpos($model_name, 'EEM_') !== 0
+			? "EEM_{$model_name}"
+			: $model_name;
+		if (! isset($this->LIB->{$model_class_name}) || ! $this->LIB->{$model_class_name} instanceof EEM_Base) {
+			return null;
+		}
+		//get that model reset it and make sure we nuke the old reference to it
+		if ($this->LIB->{$model_class_name} instanceof $model_class_name
+			&& is_callable(
+				array($model_class_name, 'reset')
+			)) {
+			$this->LIB->{$model_class_name} = $this->LIB->{$model_class_name}->reset();
+		} else {
+			throw new EE_Error(
+				sprintf(
+					esc_html__('Model %s does not have a method "reset"', 'event_espresso'),
+					$model_name
+				)
+			);
+		}
+		return $this->LIB->{$model_class_name};
+	}
+
+
+	/**
+	 * Resets the registry.
+	 * The criteria for what gets reset is based on what can be shared between sites on the same request when
+	 * switch_to_blog is used in a multisite install.  Here is a list of things that are NOT reset.
+	 * - $_dependency_map
+	 * - $_class_abbreviations
+	 * - $NET_CFG (EE_Network_Config): The config is shared network wide so no need to reset.
+	 * - $REQ:  Still on the same request so no need to change.
+	 * - $CAP: There is no site specific state in the EE_Capability class.
+	 * - $SSN: Although ideally, the session should not be shared between site switches, we can't reset it because only
+	 * one Session can be active in a single request.  Resetting could resolve in "headers already sent" errors.
+	 * - $addons:  In multisite, the state of the addons is something controlled via hooks etc in a normal request.  So
+	 *             for now, we won't reset the addons because it could break calls to an add-ons class/methods in the
+	 *             switch or on the restore.
+	 * - $modules
+	 * - $shortcodes
+	 * - $widgets
+	 *
+	 * @param boolean $hard             [deprecated]
+	 * @param boolean $reinstantiate    whether to create new instances of EE_Registry's singletons too,
+	 *                                  or just reset without re-instantiating (handy to set to FALSE if you're not
+	 *                                  sure if you CAN currently reinstantiate the singletons at the moment)
+	 * @param   bool  $reset_models     Defaults to true.  When false, then the models are not reset.  This is so
+	 *                                  client
+	 *                                  code instead can just change the model context to a different blog id if
+	 *                                  necessary
+	 * @return EE_Registry
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 */
+	public static function reset($hard = false, $reinstantiate = true, $reset_models = true)
+	{
+		$instance            = self::instance();
+		$instance->_cache_on = true;
+		// reset some "special" classes
+		EEH_Activation::reset();
+		$hard                     = apply_filters('FHEE__EE_Registry__reset__hard', $hard);
+		$instance->CFG            = EE_Config::reset($hard, $reinstantiate);
+		$instance->CART           = null;
+		$instance->MRM            = null;
+		$instance->AssetsRegistry = $instance->create('EventEspresso\core\services\assets\Registry');
+		//messages reset
+		EED_Messages::reset();
+		//handle of objects cached on LIB
+		foreach (array('LIB', 'modules') as $cache) {
+			foreach ($instance->{$cache} as $class_name => $class) {
+				if (self::_reset_and_unset_object($class, $reset_models)) {
+					unset($instance->{$cache}->{$class_name});
+				}
+			}
+		}
+		return $instance;
+	}
+
+
+	/**
+	 * if passed object implements ResettableInterface, then call it's reset() method
+	 * if passed object implements InterminableInterface, then return false,
+	 * to indicate that it should NOT be cleared from the Registry cache
+	 *
+	 * @param      $object
+	 * @param bool $reset_models
+	 * @return bool returns true if cached object should be unset
+	 */
+	private static function _reset_and_unset_object($object, $reset_models)
+	{
+		if (! is_object($object)) {
+			// don't unset anything that's not an object
+			return false;
+		}
+		if ($object instanceof EED_Module) {
+			$object::reset();
+			// don't unset modules
+			return false;
+		}
+		if ($object instanceof ResettableInterface) {
+			if ($object instanceof EEM_Base) {
+				if ($reset_models) {
+					$object->reset();
+					return true;
+				}
+				return false;
+			}
+			$object->reset();
+			return true;
+		}
+		if (! $object instanceof InterminableInterface) {
+			return true;
+		}
+		return false;
+	}
+
+
+	/**
+	 * Gets all the custom post type models defined
+	 *
+	 * @return array keys are model "short names" (Eg "Event") and keys are classnames (eg "EEM_Event")
+	 */
+	public function cpt_models()
+	{
+		$cpt_models = array();
+		foreach ($this->non_abstract_db_models as $short_name => $classname) {
+			if (is_subclass_of($classname, 'EEM_CPT_Base')) {
+				$cpt_models[ $short_name ] = $classname;
+			}
+		}
+		return $cpt_models;
+	}
+
+
+	/**
+	 * @return \EE_Config
+	 */
+	public static function CFG()
+	{
+		return self::instance()->CFG;
+	}
+
+
+	/**
+	 * @deprecated $VID:$
+	 * @param string $class_name
+	 * @return ReflectionClass
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 */
+	public function get_ReflectionClass($class_name)
+	{
+		return $this->mirror->getReflectionClass($class_name);
+	}
 }
 // End of file EE_Registry.core.php
 // Location: ./core/EE_Registry.core.php

Spacing +46 added lines, -46 removed lines

@@ -313,10 +313,10 @@ 
         $i18n_js_strings = (array) self::$i18n_js_strings;
         foreach ($i18n_js_strings as $key => $value) {
             if (is_scalar($value)) {
-                $i18n_js_strings[ $key ] = html_entity_decode((string) $value, ENT_QUOTES, 'UTF-8');
+                $i18n_js_strings[$key] = html_entity_decode((string) $value, ENT_QUOTES, 'UTF-8');
             }
         }
-        return '/* <![CDATA[ */ var eei18n = ' . wp_json_encode($i18n_js_strings) . '; /* ]]> */';
+        return '/* <![CDATA[ */ var eei18n = '.wp_json_encode($i18n_js_strings).'; /* ]]> */';
     }
 
 
@@ -335,7 +335,7 @@ 
             $module_class                   = get_class($module);
             $this->modules->{$module_class} = $module;
         } else {
-            if (! class_exists('EE_Module_Request_Router', false)) {
+            if ( ! class_exists('EE_Module_Request_Router', false)) {
                 $this->load_core('Module_Request_Router');
             }
             EE_Module_Request_Router::module_factory($module);
@@ -376,10 +376,10 @@ 
                 EE_CORE,
                 EE_ADMIN,
                 EE_CPTS,
-                EE_CORE . 'data_migration_scripts' . DS,
-                EE_CORE . 'capabilities' . DS,
-                EE_CORE . 'request_stack' . DS,
-                EE_CORE . 'middleware' . DS,
+                EE_CORE.'data_migration_scripts'.DS,
+                EE_CORE.'capabilities'.DS,
+                EE_CORE.'request_stack'.DS,
+                EE_CORE.'middleware'.DS,
             )
         );
         // retrieve instantiated class
@@ -414,7 +414,7 @@ 
         $service_paths = apply_filters(
             'FHEE__EE_Registry__load_service__service_paths',
             array(
-                EE_CORE . 'services' . DS,
+                EE_CORE.'services'.DS,
             )
         );
         // retrieve instantiated class
@@ -548,10 +548,10 @@ 
     {
         $paths = array(
             EE_LIBRARIES,
-            EE_LIBRARIES . 'messages' . DS,
-            EE_LIBRARIES . 'shortcodes' . DS,
-            EE_LIBRARIES . 'qtips' . DS,
-            EE_LIBRARIES . 'payment_methods' . DS,
+            EE_LIBRARIES.'messages'.DS,
+            EE_LIBRARIES.'shortcodes'.DS,
+            EE_LIBRARIES.'qtips'.DS,
+            EE_LIBRARIES.'payment_methods'.DS,
         );
         // retrieve instantiated class
         return $this->_load(
@@ -618,10 +618,10 @@ 
     public function load_model_class($class_name, $arguments = array(), $load_only = true)
     {
         $paths = array(
-            EE_MODELS . 'fields' . DS,
-            EE_MODELS . 'helpers' . DS,
-            EE_MODELS . 'relations' . DS,
-            EE_MODELS . 'strategies' . DS,
+            EE_MODELS.'fields'.DS,
+            EE_MODELS.'helpers'.DS,
+            EE_MODELS.'relations'.DS,
+            EE_MODELS.'strategies'.DS,
         );
         // retrieve instantiated class
         return $this->_load(
@@ -645,7 +645,7 @@ 
      */
     public function is_model_name($model_name)
     {
-        return isset($this->models[ $model_name ]);
+        return isset($this->models[$model_name]);
     }
 
 
@@ -766,7 +766,7 @@ 
                 return $cached_class;
             }
         }// obtain the loader method from the dependency map
-        $loader = $this->_dependency_map->class_loader($class_name);// instantiate the requested object
+        $loader = $this->_dependency_map->class_loader($class_name); // instantiate the requested object
         if ($loader instanceof Closure) {
             $class_obj = $loader($arguments);
         } else {
@@ -808,7 +808,7 @@ 
             case 1:
                 // if it's a FQCN then maybe the class is registered with a preceding \
                 $class_name = strpos($class_name, '\\') !== false
-                    ? '\\' . ltrim($class_name, '\\')
+                    ? '\\'.ltrim($class_name, '\\')
                     : $class_name;
                 break;
             case 2:
@@ -862,11 +862,11 @@ 
         // strip php file extension
         $class_name = str_replace('.php', '', trim($class_name));
         // does the class have a prefix ?
-        if (! empty($class_prefix) && $class_prefix !== 'addon') {
+        if ( ! empty($class_prefix) && $class_prefix !== 'addon') {
             // make sure $class_prefix is uppercase
             $class_prefix = strtoupper(trim($class_prefix));
             // add class prefix ONCE!!!
-            $class_name = $class_prefix . str_replace($class_prefix, '', $class_name);
+            $class_name = $class_prefix.str_replace($class_prefix, '', $class_name);
         }
         $class_name   = $this->class_cache->getFqnForAlias($class_name);
         $class_exists = class_exists($class_name, false);
@@ -885,7 +885,7 @@ 
             }
         }
         // if the class doesn't already exist.. then we need to try and find the file and load it
-        if (! $class_exists) {
+        if ( ! $class_exists) {
             // get full path to file
             $path = $this->_resolve_path($class_name, $type, $file_paths);
             // load the file
@@ -896,7 +896,7 @@ 
                 return $loaded;
             }
             // if an object was expected but loading failed, then return nothing
-            if (! $loaded) {
+            if ( ! $loaded) {
                 return null;
             }
         }
@@ -924,8 +924,8 @@ 
      */
     protected function get_class_abbreviation($class_name, $default = 'FANCY_BATMAN_PANTS')
     {
-        return isset($this->_class_abbreviations[ $class_name ])
-            ? $this->_class_abbreviations[ $class_name ]
+        return isset($this->_class_abbreviations[$class_name])
+            ? $this->_class_abbreviations[$class_name]
             : $default;
     }
 
@@ -1059,7 +1059,7 @@ 
             $this->addons->{$class_name} = $class_obj;
             return;
         }
-        if (! $from_db) {
+        if ( ! $from_db) {
             $class_name               = $this->object_identifier->getIdentifier($class_name, $arguments);
             $this->LIB->{$class_name} = $class_obj;
         }
@@ -1090,13 +1090,13 @@ 
                 : EE_CLASSES;
             // prep file type
             $type = ! empty($type)
-                ? trim($type, '.') . '.'
+                ? trim($type, '.').'.'
                 : '';
             // build full file path
-            $file_paths[ $key ] = rtrim($file_path, DS) . DS . $class_name . '.' . $type . 'php';
+            $file_paths[$key] = rtrim($file_path, DS).DS.$class_name.'.'.$type.'php';
             //does the file exist and can be read ?
-            if (is_readable($file_paths[ $key ])) {
-                return $file_paths[ $key ];
+            if (is_readable($file_paths[$key])) {
+                return $file_paths[$key];
             }
         }
         return false;
@@ -1121,7 +1121,7 @@ 
         // don't give up! you gotta...
         try {
             //does the file exist and can it be read ?
-            if (! $path) {
+            if ( ! $path) {
                 // just in case the file has already been autoloaded,
                 // but discrepancies in the naming schema are preventing it from
                 // being loaded via one of the EE_Registry::load_*() methods,
@@ -1131,7 +1131,7 @@ 
                     return true;
                 }
                 // so sorry, can't find the file
-                throw new EE_Error (
+                throw new EE_Error(
                     sprintf(
                         esc_html__(
                             'The %1$s file %2$s could not be located or is not readable due to file permissions. Please ensure that the following filepath(s) are correct: %3$s',
@@ -1139,7 +1139,7 @@ 
                         ),
                         trim($type, '.'),
                         $class_name,
-                        '<br />' . implode(',<br />', $file_paths)
+                        '<br />'.implode(',<br />', $file_paths)
                     )
                 );
             }
@@ -1182,8 +1182,8 @@ 
             $legacy_parent_class_map = array(
                 'EE_Payment_Processor' => 'core/business/EE_Processor_Base.class.php',
             );
-            if (isset($legacy_parent_class_map[ $class_name ])) {
-                require_once EE_PLUGIN_DIR_PATH . $legacy_parent_class_map[ $class_name ];
+            if (isset($legacy_parent_class_map[$class_name])) {
+                require_once EE_PLUGIN_DIR_PATH.$legacy_parent_class_map[$class_name];
             }
         } catch (Exception $exception) {
         }
@@ -1316,7 +1316,7 @@ 
         // let's examine the constructor
         $constructor = $this->mirror->getConstructorFromReflection($reflector);
         // whu? huh? nothing?
-        if (! $constructor) {
+        if ( ! $constructor) {
             return $arguments;
         }
         // get constructor parameters
@@ -1336,7 +1336,7 @@ 
                 $param_class === null
                 // and something already exists in the incoming arguments for this param
                 && array_key_exists($index, $argument_keys)
-                && array_key_exists($argument_keys[ $index ], $arguments)
+                && array_key_exists($argument_keys[$index], $arguments)
             ) {
                 // so let's skip this argument and move on to the next
                 continue;
@@ -1344,8 +1344,8 @@ 
             if (
                 // parameter is type hinted as a class, exists as an incoming argument, AND it's the correct class
                 $param_class !== null
-                && isset($argument_keys[ $index ], $arguments[ $argument_keys[ $index ] ])
-                && $arguments[ $argument_keys[ $index ] ] instanceof $param_class
+                && isset($argument_keys[$index], $arguments[$argument_keys[$index]])
+                && $arguments[$argument_keys[$index]] instanceof $param_class
             ) {
                 // skip this argument and move on to the next
                 continue;
@@ -1362,7 +1362,7 @@ 
                     $index
                 );
             } else {
-                $arguments[ $index ] = $this->mirror->getParameterDefaultValue(
+                $arguments[$index] = $this->mirror->getParameterDefaultValue(
                     $param,
                     $class_name,
                     $index
@@ -1424,7 +1424,7 @@ 
         // did we successfully find the correct dependency ?
         if ($dependency instanceof $param_class) {
             // then let's inject it into the incoming array of arguments at the correct location
-            $arguments[ $index ] = $dependency;
+            $arguments[$index] = $dependency;
         }
         return $arguments;
     }
@@ -1515,7 +1515,7 @@ 
     {
         $addons = array();
         foreach ($this->addons as $addon) {
-            $addons[ $addon->name() ] = $addon;
+            $addons[$addon->name()] = $addon;
         }
         return $addons;
     }
@@ -1534,7 +1534,7 @@ 
         $model_class_name = strpos($model_name, 'EEM_') !== 0
             ? "EEM_{$model_name}"
             : $model_name;
-        if (! isset($this->LIB->{$model_class_name}) || ! $this->LIB->{$model_class_name} instanceof EEM_Base) {
+        if ( ! isset($this->LIB->{$model_class_name}) || ! $this->LIB->{$model_class_name} instanceof EEM_Base) {
             return null;
         }
         //get that model reset it and make sure we nuke the old reference to it
@@ -1624,7 +1624,7 @@ 
      */
     private static function _reset_and_unset_object($object, $reset_models)
     {
-        if (! is_object($object)) {
+        if ( ! is_object($object)) {
             // don't unset anything that's not an object
             return false;
         }
@@ -1644,7 +1644,7 @@ 
             $object->reset();
             return true;
         }
-        if (! $object instanceof InterminableInterface) {
+        if ( ! $object instanceof InterminableInterface) {
             return true;
         }
         return false;
@@ -1661,7 +1661,7 @@ 
         $cpt_models = array();
         foreach ($this->non_abstract_db_models as $short_name => $classname) {
             if (is_subclass_of($classname, 'EEM_CPT_Base')) {
-                $cpt_models[ $short_name ] = $classname;
+                $cpt_models[$short_name] = $classname;
             }
         }
         return $cpt_models;

core/services/loaders/ObjectIdentifier.php

Indentation +107 added lines, -107 removed lines

@@ -20,111 +20,111 @@
 class ObjectIdentifier
 {
 
-    /**
-     * used to separate the FQCN from the class's arguments identifier
-     */
-    const DELIMITER = '____';
-
-    /**
-     * @var ClassInterfaceCache $class_cache
-     */
-    private $class_cache;
-
-
-    /**
-     * ObjectIdentifier constructor.
-     *
-     * @param ClassInterfaceCache $class_cache
-     */
-    public function __construct(ClassInterfaceCache $class_cache)
-    {
-        $this->class_cache = $class_cache;
-    }
-
-
-    /**
-     * Returns true if the supplied $object_identifier contains
-     * the delimiter used to separate an fqcn from the arguments hash
-     *
-     * @param string $object_identifier
-     * @return bool
-     */
-    public function hasArguments($object_identifier)
-    {
-        // type casting to bool instead of using strpos() !== false
-        // because an object identifier should never begin with the delimiter
-        // therefore the delimiter should NOT be found at position 0
-        return (bool) strpos($object_identifier, ObjectIdentifier::DELIMITER);
-    }
-
-
-    /**
-     * Returns true if the supplied FQCN equals the supplied $object_identifier
-     * OR the supplied FQCN matches the FQCN portion of the supplied $object_identifier
-     * AND that $object_identifier is for an object with arguments.
-     * This allows a request for an object using a FQCN to match
-     * a previously instantiated object with arguments
-     * without having to know those arguments.
-     *
-     * @param string $fqcn
-     * @param string $object_identifier
-     * @return bool
-     */
-    public function fqcnMatchesObjectIdentifier($fqcn, $object_identifier)
-    {
-        return $fqcn === $object_identifier
-               || strpos($object_identifier, $fqcn . ObjectIdentifier::DELIMITER) === 0;
-    }
-
-
-    /**
-     * build a string representation of an object's FQCN and arguments
-     *
-     * @param string $fqcn
-     * @param array  $arguments
-     * @return string
-     */
-    public function getIdentifier($fqcn, array $arguments = array())
-    {
-        // only build identifier from arguments if class is not ReservedInstanceInterface
-        $identifier = ! $this->class_cache->hasInterface($fqcn,
-            'EventEspresso\core\interfaces\ReservedInstanceInterface')
-            ? $this->getIdentifierForArguments($arguments)
-            : '';
-        if (! empty($identifier)) {
-            $fqcn .= ObjectIdentifier::DELIMITER . md5($identifier);
-        }
-        return $fqcn;
-    }
-
-
-    /**
-     * build a string representation of a object's arguments
-     * (mostly because Closures can't be serialized)
-     *
-     * @param array $arguments
-     * @return string
-     */
-    protected function getIdentifierForArguments(array $arguments)
-    {
-        if (empty($arguments)) {
-            return '';
-        }
-        $identifier = '';
-        foreach ($arguments as $argument) {
-            switch (true) {
-                case is_object($argument) :
-                case $argument instanceof Closure :
-                    $identifier .= spl_object_hash($argument);
-                    break;
-                case is_array($argument) :
-                    $identifier .= $this->getIdentifierForArguments($argument);
-                    break;
-                default :
-                    $identifier .= $argument;
-                    break;
-            }
-        }
-        return $identifier;
-    }
+	/**
+	 * used to separate the FQCN from the class's arguments identifier
+	 */
+	const DELIMITER = '____';
+
+	/**
+	 * @var ClassInterfaceCache $class_cache
+	 */
+	private $class_cache;
+
+
+	/**
+	 * ObjectIdentifier constructor.
+	 *
+	 * @param ClassInterfaceCache $class_cache
+	 */
+	public function __construct(ClassInterfaceCache $class_cache)
+	{
+		$this->class_cache = $class_cache;
+	}
+
+
+	/**
+	 * Returns true if the supplied $object_identifier contains
+	 * the delimiter used to separate an fqcn from the arguments hash
+	 *
+	 * @param string $object_identifier
+	 * @return bool
+	 */
+	public function hasArguments($object_identifier)
+	{
+		// type casting to bool instead of using strpos() !== false
+		// because an object identifier should never begin with the delimiter
+		// therefore the delimiter should NOT be found at position 0
+		return (bool) strpos($object_identifier, ObjectIdentifier::DELIMITER);
+	}
+
+
+	/**
+	 * Returns true if the supplied FQCN equals the supplied $object_identifier
+	 * OR the supplied FQCN matches the FQCN portion of the supplied $object_identifier
+	 * AND that $object_identifier is for an object with arguments.
+	 * This allows a request for an object using a FQCN to match
+	 * a previously instantiated object with arguments
+	 * without having to know those arguments.
+	 *
+	 * @param string $fqcn
+	 * @param string $object_identifier
+	 * @return bool
+	 */
+	public function fqcnMatchesObjectIdentifier($fqcn, $object_identifier)
+	{
+		return $fqcn === $object_identifier
+			   || strpos($object_identifier, $fqcn . ObjectIdentifier::DELIMITER) === 0;
+	}
+
+
+	/**
+	 * build a string representation of an object's FQCN and arguments
+	 *
+	 * @param string $fqcn
+	 * @param array  $arguments
+	 * @return string
+	 */
+	public function getIdentifier($fqcn, array $arguments = array())
+	{
+		// only build identifier from arguments if class is not ReservedInstanceInterface
+		$identifier = ! $this->class_cache->hasInterface($fqcn,
+			'EventEspresso\core\interfaces\ReservedInstanceInterface')
+			? $this->getIdentifierForArguments($arguments)
+			: '';
+		if (! empty($identifier)) {
+			$fqcn .= ObjectIdentifier::DELIMITER . md5($identifier);
+		}
+		return $fqcn;
+	}
+
+
+	/**
+	 * build a string representation of a object's arguments
+	 * (mostly because Closures can't be serialized)
+	 *
+	 * @param array $arguments
+	 * @return string
+	 */
+	protected function getIdentifierForArguments(array $arguments)
+	{
+		if (empty($arguments)) {
+			return '';
+		}
+		$identifier = '';
+		foreach ($arguments as $argument) {
+			switch (true) {
+				case is_object($argument) :
+				case $argument instanceof Closure :
+					$identifier .= spl_object_hash($argument);
+					break;
+				case is_array($argument) :
+					$identifier .= $this->getIdentifierForArguments($argument);
+					break;
+				default :
+					$identifier .= $argument;
+					break;
+			}
+		}
+		return $identifier;
+	}
 }
\ No newline at end of file

Spacing +3 added lines, -3 removed lines

@@ -73,7 +73,7 @@ 
     public function fqcnMatchesObjectIdentifier($fqcn, $object_identifier)
     {
         return $fqcn === $object_identifier
-               || strpos($object_identifier, $fqcn . ObjectIdentifier::DELIMITER) === 0;
+               || strpos($object_identifier, $fqcn.ObjectIdentifier::DELIMITER) === 0;
     }
 
 
@@ -91,8 +91,8 @@ 
             'EventEspresso\core\interfaces\ReservedInstanceInterface')
             ? $this->getIdentifierForArguments($arguments)
             : '';
-        if (! empty($identifier)) {
-            $fqcn .= ObjectIdentifier::DELIMITER . md5($identifier);
+        if ( ! empty($identifier)) {
+            $fqcn .= ObjectIdentifier::DELIMITER.md5($identifier);
         }
         return $fqcn;
     }

core/services/loaders/CachingLoader.php

Indentation +141 added lines, -141 removed lines

@@ -21,147 +21,147 @@
 class CachingLoader extends CachingLoaderDecorator
 {
 
-    /**
-     * @var string $identifier
-     */
-    protected $identifier;
-
-    /**
-     * @var CollectionInterface $cache
-     */
-    protected $cache;
-
-    /**
-     * @var ObjectIdentifier
-     */
-    private $object_identifier;
-
-
-    /**
-     * CachingLoader constructor.
-     *
-     * @param LoaderDecoratorInterface $loader
-     * @param CollectionInterface      $cache
-     * @param ObjectIdentifier         $object_identifier
-     * @param string                   $identifier
-     * @throws InvalidDataTypeException
-     */
-    public function __construct(
-        LoaderDecoratorInterface $loader,
-        CollectionInterface $cache,
-        ObjectIdentifier $object_identifier,
-        $identifier = ''
-    ) {
-        parent::__construct($loader);
-        $this->cache       = $cache;
-        $this->object_identifier = $object_identifier;
-        $this->setIdentifier($identifier);
-        if ($this->identifier !== '') {
-            // to only clear this cache, and assuming an identifier has been set, simply do the following:
-            // do_action('AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache__IDENTIFIER');
-            // where "IDENTIFIER" = the string that was set during construction
-            add_action(
-                "AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache__{$identifier}",
-                array($this, 'reset')
-            );
-        }
-        // to clear ALL caches, simply do the following:
-        // do_action('AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache');
-        add_action(
-            'AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache',
-            array($this, 'reset')
-        );
-    }
-
-
-    /**
-     * @return string
-     */
-    public function identifier()
-    {
-        return $this->identifier;
-    }
-
-
-    /**
-     * @param string $identifier
-     * @throws InvalidDataTypeException
-     */
-    private function setIdentifier($identifier)
-    {
-        if (! is_string($identifier)) {
-            throw new InvalidDataTypeException('$identifier', $identifier, 'string');
-        }
-        $this->identifier = $identifier;
-    }
-
-
-    /**
-     * @param FullyQualifiedName|string $fqcn
-     * @param mixed                     $object
-     * @return bool
-     * @throws InvalidArgumentException
-     */
-    public function share($fqcn, $object)
-    {
-        if ($object instanceof $fqcn) {
-            return $this->cache->add($object, md5($fqcn));
-        }
-        throw new InvalidArgumentException(
-            sprintf(
-                esc_html__(
-                    'The supplied class name "%1$s" must match the class of the supplied object.',
-                    'event_espresso'
-                ),
-                $fqcn
-            )
-        );
-    }
-
-
-    /**
-     * @param FullyQualifiedName|string $fqcn
-     * @param array                     $arguments
-     * @param bool                      $shared
-     * @param array                     $interfaces
-     * @return mixed
-     */
-    public function load($fqcn, $arguments = array(), $shared = true, array $interfaces = array())
-    {
-        $fqcn = ltrim($fqcn, '\\');
-        // caching can be turned off via the following code:
-        // add_filter('FHEE__EventEspresso_core_services_loaders_CachingLoader__load__bypass_cache', '__return_true');
-        if (
-            apply_filters(
-                'FHEE__EventEspresso_core_services_loaders_CachingLoader__load__bypass_cache',
-                false,
-                $this
-            )
-        ) {
-            // even though $shared might be true, caching could be bypassed for whatever reason,
-            // so we don't want the core loader to cache anything, therefore caching is turned off
-            return $this->loader->load($fqcn, $arguments, false);
-        }
-        $object_identifier = $this->object_identifier->getIdentifier($fqcn, $arguments);
-        if ($this->cache->has($object_identifier)) {
-            return $this->cache->get($object_identifier);
-        }
-        $object = $this->loader->load($fqcn, $arguments, $shared);
-        if ($object instanceof $fqcn) {
-            $this->cache->add($object, $object_identifier);
-        }
-        return $object;
-    }
-
-
-    /**
-     * empties cache and calls reset() on loader if method exists
-     */
-    public function reset()
-    {
-        $this->cache->trashAndDetachAll();
-        $this->loader->reset();
-    }
+	/**
+	 * @var string $identifier
+	 */
+	protected $identifier;
+
+	/**
+	 * @var CollectionInterface $cache
+	 */
+	protected $cache;
+
+	/**
+	 * @var ObjectIdentifier
+	 */
+	private $object_identifier;
+
+
+	/**
+	 * CachingLoader constructor.
+	 *
+	 * @param LoaderDecoratorInterface $loader
+	 * @param CollectionInterface      $cache
+	 * @param ObjectIdentifier         $object_identifier
+	 * @param string                   $identifier
+	 * @throws InvalidDataTypeException
+	 */
+	public function __construct(
+		LoaderDecoratorInterface $loader,
+		CollectionInterface $cache,
+		ObjectIdentifier $object_identifier,
+		$identifier = ''
+	) {
+		parent::__construct($loader);
+		$this->cache       = $cache;
+		$this->object_identifier = $object_identifier;
+		$this->setIdentifier($identifier);
+		if ($this->identifier !== '') {
+			// to only clear this cache, and assuming an identifier has been set, simply do the following:
+			// do_action('AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache__IDENTIFIER');
+			// where "IDENTIFIER" = the string that was set during construction
+			add_action(
+				"AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache__{$identifier}",
+				array($this, 'reset')
+			);
+		}
+		// to clear ALL caches, simply do the following:
+		// do_action('AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache');
+		add_action(
+			'AHEE__EventEspresso_core_services_loaders_CachingLoader__resetCache',
+			array($this, 'reset')
+		);
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function identifier()
+	{
+		return $this->identifier;
+	}
+
+
+	/**
+	 * @param string $identifier
+	 * @throws InvalidDataTypeException
+	 */
+	private function setIdentifier($identifier)
+	{
+		if (! is_string($identifier)) {
+			throw new InvalidDataTypeException('$identifier', $identifier, 'string');
+		}
+		$this->identifier = $identifier;
+	}
+
+
+	/**
+	 * @param FullyQualifiedName|string $fqcn
+	 * @param mixed                     $object
+	 * @return bool
+	 * @throws InvalidArgumentException
+	 */
+	public function share($fqcn, $object)
+	{
+		if ($object instanceof $fqcn) {
+			return $this->cache->add($object, md5($fqcn));
+		}
+		throw new InvalidArgumentException(
+			sprintf(
+				esc_html__(
+					'The supplied class name "%1$s" must match the class of the supplied object.',
+					'event_espresso'
+				),
+				$fqcn
+			)
+		);
+	}
+
+
+	/**
+	 * @param FullyQualifiedName|string $fqcn
+	 * @param array                     $arguments
+	 * @param bool                      $shared
+	 * @param array                     $interfaces
+	 * @return mixed
+	 */
+	public function load($fqcn, $arguments = array(), $shared = true, array $interfaces = array())
+	{
+		$fqcn = ltrim($fqcn, '\\');
+		// caching can be turned off via the following code:
+		// add_filter('FHEE__EventEspresso_core_services_loaders_CachingLoader__load__bypass_cache', '__return_true');
+		if (
+			apply_filters(
+				'FHEE__EventEspresso_core_services_loaders_CachingLoader__load__bypass_cache',
+				false,
+				$this
+			)
+		) {
+			// even though $shared might be true, caching could be bypassed for whatever reason,
+			// so we don't want the core loader to cache anything, therefore caching is turned off
+			return $this->loader->load($fqcn, $arguments, false);
+		}
+		$object_identifier = $this->object_identifier->getIdentifier($fqcn, $arguments);
+		if ($this->cache->has($object_identifier)) {
+			return $this->cache->get($object_identifier);
+		}
+		$object = $this->loader->load($fqcn, $arguments, $shared);
+		if ($object instanceof $fqcn) {
+			$this->cache->add($object, $object_identifier);
+		}
+		return $object;
+	}
+
+
+	/**
+	 * empties cache and calls reset() on loader if method exists
+	 */
+	public function reset()
+	{
+		$this->cache->trashAndDetachAll();
+		$this->loader->reset();
+	}
 
 
 

Spacing +2 added lines, -2 removed lines

@@ -53,7 +53,7 @@ 
         $identifier = ''
     ) {
         parent::__construct($loader);
-        $this->cache       = $cache;
+        $this->cache = $cache;
         $this->object_identifier = $object_identifier;
         $this->setIdentifier($identifier);
         if ($this->identifier !== '') {
@@ -89,7 +89,7 @@ 
      */
     private function setIdentifier($identifier)
     {
-        if (! is_string($identifier)) {
+        if ( ! is_string($identifier)) {
             throw new InvalidDataTypeException('$identifier', $identifier, 'string');
         }
         $this->identifier = $identifier;

core/services/loaders/LoaderFactory.php

Indentation +39 added lines, -39 removed lines

@@ -80,47 +80,47 @@
 class LoaderFactory
 {
 
-    /**
-     * @var LoaderInterface $loader ;
-     */
-    private static $loader;
+	/**
+	 * @var LoaderInterface $loader ;
+	 */
+	private static $loader;
 
 
-    /**
-     * @param EE_Registry|CoffeeShop   $generator   provided during very first instantiation in
-     *                                              BootstrapDependencyInjectionContainer::buildLoader()
-     *                                              otherwise can be left null
-     * @param ClassInterfaceCache|null $class_cache also provided during first instantiation
-     * @param ObjectIdentifier|null    $object_identifier
-     * @return LoaderInterface
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public static function getLoader(
-        $generator = null,
-        ClassInterfaceCache $class_cache = null,
-        ObjectIdentifier $object_identifier = null
-    ) {
-        if (
-            ! LoaderFactory::$loader instanceof LoaderInterface
-            && ($generator instanceof EE_Registry || $generator instanceof CoffeeShop)
-            && $class_cache instanceof ClassInterfaceCache
-            && $object_identifier instanceof ObjectIdentifier
-        ) {
-            $core_loader = new CoreLoader($generator);
-            LoaderFactory::$loader = new Loader(
-                $core_loader,
-                new CachingLoader(
-                    $core_loader,
-                    new LooseCollection(''),
-                    $object_identifier
-                ),
-                $class_cache
-            );
-        }
-        return LoaderFactory::$loader;
-    }
+	/**
+	 * @param EE_Registry|CoffeeShop   $generator   provided during very first instantiation in
+	 *                                              BootstrapDependencyInjectionContainer::buildLoader()
+	 *                                              otherwise can be left null
+	 * @param ClassInterfaceCache|null $class_cache also provided during first instantiation
+	 * @param ObjectIdentifier|null    $object_identifier
+	 * @return LoaderInterface
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public static function getLoader(
+		$generator = null,
+		ClassInterfaceCache $class_cache = null,
+		ObjectIdentifier $object_identifier = null
+	) {
+		if (
+			! LoaderFactory::$loader instanceof LoaderInterface
+			&& ($generator instanceof EE_Registry || $generator instanceof CoffeeShop)
+			&& $class_cache instanceof ClassInterfaceCache
+			&& $object_identifier instanceof ObjectIdentifier
+		) {
+			$core_loader = new CoreLoader($generator);
+			LoaderFactory::$loader = new Loader(
+				$core_loader,
+				new CachingLoader(
+					$core_loader,
+					new LooseCollection(''),
+					$object_identifier
+				),
+				$class_cache
+			);
+		}
+		return LoaderFactory::$loader;
+	}
 
 
 }

core/services/bootstrap/BootstrapDependencyInjectionContainer.php

Indentation +121 added lines, -121 removed lines

@@ -29,126 +29,126 @@
 class BootstrapDependencyInjectionContainer
 {
 
-    /**
-     * @var EE_Dependency_Map $dependency_map
-     */
-    protected $dependency_map;
-
-    /**
-     * @type LoaderInterface $loader
-     */
-    protected $loader;
-
-    /**
-     * @var EE_Registry $registry
-     */
-    protected $registry;
-
-    /**
-     * @var ClassInterfaceCache $class_cache
-     */
-    private $class_cache;
-
-    /**
-     * @var Mirror
-     */
-    private $mirror;
-
-    /**
-     * @var ObjectIdentifier
-     */
-    private $object_identifier;
-
-
-    /**
-     * Can't use this just yet until we exorcise some more of our singleton usage from core
-     */
-    public function buildDependencyInjectionContainer()
-    {
-        // build DI container
-        // $OpenCoffeeShop = new EventEspresso\core\services\container\OpenCoffeeShop();
-        // $OpenCoffeeShop->addRecipes();
-        // $CoffeeShop = $OpenCoffeeShop->CoffeeShop();
-    }
-
-
-    /**
-     * Setups  EE_Registry and EE_Dependency_Map
-     *
-     * @throws EE_Error
-     */
-    public function buildLegacyDependencyInjectionContainer()
-    {
-        $this->class_cache = new ClassInterfaceCache();
-        $this->object_identifier = new ObjectIdentifier($this->class_cache);
-        $this->mirror = new Mirror();
-        // EE_Dependency_Map: info about how to load classes required by other classes
-        espresso_load_required(
-            'EE_Dependency_Map',
-            EE_CORE . 'EE_Dependency_Map.core.php'
-        );
-        $this->dependency_map = EE_Dependency_Map::instance($this->class_cache);
-        // EE_Registry: central repository for classes (legacy)
-        espresso_load_required(
-            'EE_Registry',
-            EE_CORE . 'EE_Registry.core.php'
-        );
-        $this->registry = EE_Registry::instance(
-            $this->dependency_map,
-            $this->mirror,
-            $this->class_cache,
-            $this->object_identifier
-        );
-
-    }
-
-
-    /**
-     * Performs initial setup for the generic Loader
-     *
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidArgumentException
-     */
-    public function buildLoader()
-    {
-        $this->loader = LoaderFactory::getLoader(
-            $this->registry,
-            $this->class_cache,
-            $this->object_identifier
-        );
-        $this->loader->share('EventEspresso\core\services\loaders\ClassInterfaceCache', $this->class_cache);
-        $this->loader->share('EventEspresso\core\services\loaders\ObjectIdentifier', $this->object_identifier);
-        $this->loader->share('EventEspresso\core\services\container\Mirror', $this->mirror);
-        $this->dependency_map->setLoader($this->loader);
-    }
-
-
-    /**
-     * @return EE_Dependency_Map
-     */
-    public function getDependencyMap()
-    {
-        return $this->dependency_map;
-    }
-
-
-    /**
-     * @return EE_Registry
-     */
-    public function getRegistry()
-    {
-        return $this->registry;
-    }
-
-
-
-    /**
-     * @return LoaderInterface
-     */
-    public function getLoader()
-    {
-        return $this->loader;
-    }
+	/**
+	 * @var EE_Dependency_Map $dependency_map
+	 */
+	protected $dependency_map;
+
+	/**
+	 * @type LoaderInterface $loader
+	 */
+	protected $loader;
+
+	/**
+	 * @var EE_Registry $registry
+	 */
+	protected $registry;
+
+	/**
+	 * @var ClassInterfaceCache $class_cache
+	 */
+	private $class_cache;
+
+	/**
+	 * @var Mirror
+	 */
+	private $mirror;
+
+	/**
+	 * @var ObjectIdentifier
+	 */
+	private $object_identifier;
+
+
+	/**
+	 * Can't use this just yet until we exorcise some more of our singleton usage from core
+	 */
+	public function buildDependencyInjectionContainer()
+	{
+		// build DI container
+		// $OpenCoffeeShop = new EventEspresso\core\services\container\OpenCoffeeShop();
+		// $OpenCoffeeShop->addRecipes();
+		// $CoffeeShop = $OpenCoffeeShop->CoffeeShop();
+	}
+
+
+	/**
+	 * Setups  EE_Registry and EE_Dependency_Map
+	 *
+	 * @throws EE_Error
+	 */
+	public function buildLegacyDependencyInjectionContainer()
+	{
+		$this->class_cache = new ClassInterfaceCache();
+		$this->object_identifier = new ObjectIdentifier($this->class_cache);
+		$this->mirror = new Mirror();
+		// EE_Dependency_Map: info about how to load classes required by other classes
+		espresso_load_required(
+			'EE_Dependency_Map',
+			EE_CORE . 'EE_Dependency_Map.core.php'
+		);
+		$this->dependency_map = EE_Dependency_Map::instance($this->class_cache);
+		// EE_Registry: central repository for classes (legacy)
+		espresso_load_required(
+			'EE_Registry',
+			EE_CORE . 'EE_Registry.core.php'
+		);
+		$this->registry = EE_Registry::instance(
+			$this->dependency_map,
+			$this->mirror,
+			$this->class_cache,
+			$this->object_identifier
+		);
+
+	}
+
+
+	/**
+	 * Performs initial setup for the generic Loader
+	 *
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidArgumentException
+	 */
+	public function buildLoader()
+	{
+		$this->loader = LoaderFactory::getLoader(
+			$this->registry,
+			$this->class_cache,
+			$this->object_identifier
+		);
+		$this->loader->share('EventEspresso\core\services\loaders\ClassInterfaceCache', $this->class_cache);
+		$this->loader->share('EventEspresso\core\services\loaders\ObjectIdentifier', $this->object_identifier);
+		$this->loader->share('EventEspresso\core\services\container\Mirror', $this->mirror);
+		$this->dependency_map->setLoader($this->loader);
+	}
+
+
+	/**
+	 * @return EE_Dependency_Map
+	 */
+	public function getDependencyMap()
+	{
+		return $this->dependency_map;
+	}
+
+
+	/**
+	 * @return EE_Registry
+	 */
+	public function getRegistry()
+	{
+		return $this->registry;
+	}
+
+
+
+	/**
+	 * @return LoaderInterface
+	 */
+	public function getLoader()
+	{
+		return $this->loader;
+	}
 
 }

core/EE_Dependency_Map.core.php

Indentation +837 added lines, -837 removed lines

@@ -8,7 +8,7 @@ 
 use EventEspresso\core\services\request\ResponseInterface;
 
 if (! defined('EVENT_ESPRESSO_VERSION')) {
-    exit('No direct script access allowed');
+	exit('No direct script access allowed');
 }
 
 
@@ -25,842 +25,842 @@ 
 class EE_Dependency_Map
 {
 
-    /**
-     * This means that the requested class dependency is not present in the dependency map
-     */
-    const not_registered = 0;
-
-    /**
-     * This instructs class loaders to ALWAYS return a newly instantiated object for the requested class.
-     */
-    const load_new_object = 1;
-
-    /**
-     * This instructs class loaders to return a previously instantiated and cached object for the requested class.
-     * IF a previously instantiated object does not exist, a new one will be created and added to the cache.
-     */
-    const load_from_cache = 2;
-
-    /**
-     * When registering a dependency,
-     * this indicates to keep any existing dependencies that already exist,
-     * and simply discard any new dependencies declared in the incoming data
-     */
-    const KEEP_EXISTING_DEPENDENCIES = 0;
-
-    /**
-     * When registering a dependency,
-     * this indicates to overwrite any existing dependencies that already exist using the incoming data
-     */
-    const OVERWRITE_DEPENDENCIES = 1;
-
-
-
-    /**
-     * @type EE_Dependency_Map $_instance
-     */
-    protected static $_instance;
-
-    /**
-     * @var ClassInterfaceCache $class_cache
-     */
-    private $class_cache;
-
-    /**
-     * @type RequestInterface $request
-     */
-    protected $request;
-
-    /**
-     * @type LegacyRequestInterface $legacy_request
-     */
-    protected $legacy_request;
-
-    /**
-     * @type ResponseInterface $response
-     */
-    protected $response;
-
-    /**
-     * @type LoaderInterface $loader
-     */
-    protected $loader;
-
-    /**
-     * @type array $_dependency_map
-     */
-    protected $_dependency_map = array();
-
-    /**
-     * @type array $_class_loaders
-     */
-    protected $_class_loaders = array();
-
-
-    /**
-     * EE_Dependency_Map constructor.
-     *
-     * @param ClassInterfaceCache $class_cache
-     */
-    protected function __construct(ClassInterfaceCache $class_cache)
-    {
-        $this->class_cache = $class_cache;
-        do_action('EE_Dependency_Map____construct', $this);
-    }
-
-
-    /**
-     * @return void
-     */
-    public function initialize()
-    {
-        $this->_register_core_dependencies();
-        $this->_register_core_class_loaders();
-        $this->_register_core_aliases();
-    }
-
-
-    /**
-     * @singleton method used to instantiate class object
-     * @param ClassInterfaceCache|null $class_cache
-     * @return EE_Dependency_Map
-     */
-    public static function instance(ClassInterfaceCache $class_cache = null) {
-        // check if class object is instantiated, and instantiated properly
-        if (
-            ! self::$_instance instanceof EE_Dependency_Map
-            && $class_cache instanceof ClassInterfaceCache
-        ) {
-            self::$_instance = new EE_Dependency_Map($class_cache);
-        }
-        return self::$_instance;
-    }
-
-
-    /**
-     * @param RequestInterface $request
-     */
-    public function setRequest(RequestInterface $request)
-    {
-        $this->request = $request;
-    }
-
-
-    /**
-     * @param LegacyRequestInterface $legacy_request
-     */
-    public function setLegacyRequest(LegacyRequestInterface $legacy_request)
-    {
-        $this->legacy_request = $legacy_request;
-    }
-
-
-    /**
-     * @param ResponseInterface $response
-     */
-    public function setResponse(ResponseInterface $response)
-    {
-        $this->response = $response;
-    }
-
-
-
-    /**
-     * @param LoaderInterface $loader
-     */
-    public function setLoader(LoaderInterface $loader)
-    {
-        $this->loader = $loader;
-    }
-
-
-
-    /**
-     * @param string $class
-     * @param array  $dependencies
-     * @param int    $overwrite
-     * @return bool
-     */
-    public static function register_dependencies(
-        $class,
-        array $dependencies,
-        $overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
-    ) {
-        return self::$_instance->registerDependencies($class, $dependencies, $overwrite);
-    }
-
-
-
-    /**
-     * Assigns an array of class names and corresponding load sources (new or cached)
-     * to the class specified by the first parameter.
-     * IMPORTANT !!!
-     * The order of elements in the incoming $dependencies array MUST match
-     * the order of the constructor parameters for the class in question.
-     * This is especially important when overriding any existing dependencies that are registered.
-     * the third parameter controls whether any duplicate dependencies are overwritten or not.
-     *
-     * @param string $class
-     * @param array  $dependencies
-     * @param int    $overwrite
-     * @return bool
-     */
-    public function registerDependencies(
-        $class,
-        array $dependencies,
-        $overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
-    ) {
-        $class = trim($class, '\\');
-        $registered = false;
-        if (empty(self::$_instance->_dependency_map[ $class ])) {
-            self::$_instance->_dependency_map[ $class ] = array();
-        }
-        // we need to make sure that any aliases used when registering a dependency
-        // get resolved to the correct class name
-        foreach ($dependencies as $dependency => $load_source) {
-            $alias = self::$_instance->get_alias($dependency);
-            if (
-                $overwrite === EE_Dependency_Map::OVERWRITE_DEPENDENCIES
-                || ! isset(self::$_instance->_dependency_map[ $class ][ $alias ])
-            ) {
-                unset($dependencies[$dependency]);
-                $dependencies[$alias] = $load_source;
-                $registered = true;
-            }
-        }
-        // now add our two lists of dependencies together.
-        // using Union (+=) favours the arrays in precedence from left to right,
-        // so $dependencies is NOT overwritten because it is listed first
-        // ie: with A = B + C, entries in B take precedence over duplicate entries in C
-        // Union is way faster than array_merge() but should be used with caution...
-        // especially with numerically indexed arrays
-        $dependencies += self::$_instance->_dependency_map[ $class ];
-        // now we need to ensure that the resulting dependencies
-        // array only has the entries that are required for the class
-        // so first count how many dependencies were originally registered for the class
-        $dependency_count = count(self::$_instance->_dependency_map[ $class ]);
-        // if that count is non-zero (meaning dependencies were already registered)
-        self::$_instance->_dependency_map[ $class ] = $dependency_count
-            // then truncate the  final array to match that count
-            ? array_slice($dependencies, 0, $dependency_count)
-            // otherwise just take the incoming array because nothing previously existed
-            : $dependencies;
-        return $registered;
-    }
-
-
-
-    /**
-     * @param string $class_name
-     * @param string $loader
-     * @return bool
-     * @throws DomainException
-     */
-    public static function register_class_loader($class_name, $loader = 'load_core')
-    {
-        if (! $loader instanceof Closure && strpos($class_name, '\\') !== false) {
-            throw new DomainException(
-                esc_html__('Don\'t use class loaders for FQCNs.', 'event_espresso')
-            );
-        }
-        // check that loader is callable or method starts with "load_" and exists in EE_Registry
-        if (
-            ! is_callable($loader)
-            && (
-                strpos($loader, 'load_') !== 0
-                || ! method_exists('EE_Registry', $loader)
-            )
-        ) {
-            throw new DomainException(
-                sprintf(
-                    esc_html__(
-                        '"%1$s" is not a valid loader method on EE_Registry.',
-                        'event_espresso'
-                    ),
-                    $loader
-                )
-            );
-        }
-        $class_name = self::$_instance->get_alias($class_name);
-        if (! isset(self::$_instance->_class_loaders[$class_name])) {
-            self::$_instance->_class_loaders[$class_name] = $loader;
-            return true;
-        }
-        return false;
-    }
-
-
-
-    /**
-     * @return array
-     */
-    public function dependency_map()
-    {
-        return $this->_dependency_map;
-    }
-
-
-
-    /**
-     * returns TRUE if dependency map contains a listing for the provided class name
-     *
-     * @param string $class_name
-     * @return boolean
-     */
-    public function has($class_name = '')
-    {
-        // all legacy models have the same dependencies
-        if (strpos($class_name, 'EEM_') === 0) {
-            $class_name = 'LEGACY_MODELS';
-        }
-        return isset($this->_dependency_map[$class_name]) ? true : false;
-    }
-
-
-
-    /**
-     * returns TRUE if dependency map contains a listing for the provided class name AND dependency
-     *
-     * @param string $class_name
-     * @param string $dependency
-     * @return bool
-     */
-    public function has_dependency_for_class($class_name = '', $dependency = '')
-    {
-        // all legacy models have the same dependencies
-        if (strpos($class_name, 'EEM_') === 0) {
-            $class_name = 'LEGACY_MODELS';
-        }
-        $dependency = $this->get_alias($dependency);
-        return isset($this->_dependency_map[$class_name][$dependency])
-            ? true
-            : false;
-    }
-
-
-
-    /**
-     * returns loading strategy for whether a previously cached dependency should be loaded or a new instance returned
-     *
-     * @param string $class_name
-     * @param string $dependency
-     * @return int
-     */
-    public function loading_strategy_for_class_dependency($class_name = '', $dependency = '')
-    {
-        // all legacy models have the same dependencies
-        if (strpos($class_name, 'EEM_') === 0) {
-            $class_name = 'LEGACY_MODELS';
-        }
-        $dependency = $this->get_alias($dependency);
-        return $this->has_dependency_for_class($class_name, $dependency)
-            ? $this->_dependency_map[$class_name][$dependency]
-            : EE_Dependency_Map::not_registered;
-    }
-
-
-
-    /**
-     * @param string $class_name
-     * @return string | Closure
-     */
-    public function class_loader($class_name)
-    {
-        // all legacy models use load_model()
-        if(strpos($class_name, 'EEM_') === 0){
-            return 'load_model';
-        }
-        $class_name = $this->get_alias($class_name);
-        return isset($this->_class_loaders[$class_name]) ? $this->_class_loaders[$class_name] : '';
-    }
-
-
-
-    /**
-     * @return array
-     */
-    public function class_loaders()
-    {
-        return $this->_class_loaders;
-    }
-
-
-
-    /**
-     * adds an alias for a classname
-     *
-     * @param string $fqcn      the class name that should be used (concrete class to replace interface)
-     * @param string $alias     the class name that would be type hinted for (abstract parent or interface)
-     * @param string $for_class the class that has the dependency (is type hinting for the interface)
-     */
-    public function add_alias($fqcn, $alias, $for_class = '')
-    {
-        $this->class_cache->addAlias($alias, $fqcn, $for_class);
-    }
-
-
-
-    /**
-     * PLZ NOTE: a better name for this method would be is_alias()
-     * because it returns TRUE if the provided fully qualified name IS an alias
-     *
-     * @param string $fqn
-     * @param string $for_class
-     * @return bool
-     */
-    public function has_alias($fqn = '', $for_class = '')
-    {
-        return $this->class_cache->isAlias($fqn, $for_class);
-    }
-
-
-
-    /**
-     * PLZ NOTE: a better name for this method would be get_fqn_for_alias()
-     * because it returns a FQN for provided alias if one exists, otherwise returns the original $alias
-     * functions recursively, so that multiple aliases can be used to drill down to a FQN
-     *  for example:
-     *      if the following two entries were added to the _aliases array:
-     *          array(
-     *              'interface_alias'           => 'some\namespace\interface'
-     *              'some\namespace\interface'  => 'some\namespace\classname'
-     *          )
-     *      then one could use EE_Registry::instance()->create( 'interface_alias' )
-     *      to load an instance of 'some\namespace\classname'
-     *
-     * @param string $alias
-     * @param string $for_class
-     * @return string
-     */
-    public function get_alias($alias = '', $for_class = '')
-    {
-        return (string) $this->class_cache->getFqnForAlias($alias, $for_class);
-    }
-
-
-
-    /**
-     * Registers the core dependencies and whether a previously instantiated object should be loaded from the cache,
-     * if one exists, or whether a new object should be generated every time the requested class is loaded.
-     * This is done by using the following class constants:
-     *        EE_Dependency_Map::load_from_cache - loads previously instantiated object
-     *        EE_Dependency_Map::load_new_object - generates a new object every time
-     */
-    protected function _register_core_dependencies()
-    {
-        $this->_dependency_map = array(
-            'EE_Request_Handler'                                                                                          => array(
-                'EE_Request' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_System'                                                                                                   => array(
-                'EE_Registry'                                 => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
-                'EE_Maintenance_Mode'                         => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Session'                                                                                                  => array(
-                'EventEspresso\core\services\cache\TransientCacheStorage'  => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\domain\values\session\SessionLifespan' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\request\Request'              => EE_Dependency_Map::load_from_cache,
-                'EE_Encryption'                                            => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Cart'                                                                                                     => array(
-                'EE_Session' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Front_Controller'                                                                                         => array(
-                'EE_Registry'              => EE_Dependency_Map::load_from_cache,
-                'EE_Request_Handler'       => EE_Dependency_Map::load_from_cache,
-                'EE_Module_Request_Router' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Messenger_Collection_Loader'                                                                              => array(
-                'EE_Messenger_Collection' => EE_Dependency_Map::load_new_object,
-            ),
-            'EE_Message_Type_Collection_Loader'                                                                           => array(
-                'EE_Message_Type_Collection' => EE_Dependency_Map::load_new_object,
-            ),
-            'EE_Message_Resource_Manager'                                                                                 => array(
-                'EE_Messenger_Collection_Loader'    => EE_Dependency_Map::load_new_object,
-                'EE_Message_Type_Collection_Loader' => EE_Dependency_Map::load_new_object,
-                'EEM_Message_Template_Group'        => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Message_Factory'                                                                                          => array(
-                'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_messages'                                                                                                 => array(
-                'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Messages_Generator'                                                                                       => array(
-                'EE_Messages_Queue'                    => EE_Dependency_Map::load_new_object,
-                'EE_Messages_Data_Handler_Collection'  => EE_Dependency_Map::load_new_object,
-                'EE_Message_Template_Group_Collection' => EE_Dependency_Map::load_new_object,
-                'EEH_Parse_Shortcodes'                 => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Messages_Processor'                                                                                       => array(
-                'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Messages_Queue'                                                                                           => array(
-                'EE_Message_Repository' => EE_Dependency_Map::load_new_object,
-            ),
-            'EE_Messages_Template_Defaults'                                                                               => array(
-                'EEM_Message_Template_Group' => EE_Dependency_Map::load_from_cache,
-                'EEM_Message_Template'       => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Message_To_Generate_From_Request'                                                                         => array(
-                'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
-                'EE_Request_Handler'          => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\CommandBus'                                                             => array(
-                'EventEspresso\core\services\commands\CommandHandlerManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\services\commands\CommandHandler'                                                              => array(
-                'EE_Registry'         => EE_Dependency_Map::load_from_cache,
-                'CommandBusInterface' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\CommandHandlerManager'                                                  => array(
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\CompositeCommandHandler'                                                => array(
-                'EventEspresso\core\services\commands\CommandBus'     => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\commands\CommandFactory' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\CommandFactory'                                                         => array(
-                'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\middleware\CapChecker'                                                  => array(
-                'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker'                                         => array(
-                'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\services\capabilities\RegistrationsCapChecker'                                     => array(
-                'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\registration\CreateRegistrationCommandHandler'                          => array(
-                'EventEspresso\core\domain\services\registration\CreateRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommandHandler'                     => array(
-                'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommandHandler'                    => array(
-                'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler'         => array(
-                'EventEspresso\core\domain\services\registration\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler' => array(
-                'EventEspresso\core\domain\services\registration\UpdateRegistrationService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommandHandler'                              => array(
-                'EventEspresso\core\domain\services\ticket\CreateTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\ticket\CancelTicketLineItemCommandHandler'                              => array(
-                'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\services\registration\CancelRegistrationService'                                   => array(
-                'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler'                                  => array(
-                'EEM_Attendee' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\database\TableManager'                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Data_Migration_Class_Base'                                                                                => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_1_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_2_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_3_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_4_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_5_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_6_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_7_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_8_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_DMS_Core_4_9_0'                                                                                           => array(
-                'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\assets\Registry'                                                                 => array(
-                'EE_Template_Config' => EE_Dependency_Map::load_from_cache,
-                'EE_Currency_Config' => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache
-            ),
-            'EventEspresso\core\domain\entities\shortcodes\EspressoCancelled'                                             => array(
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\entities\shortcodes\EspressoCheckout'                                              => array(
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\entities\shortcodes\EspressoEventAttendees'                                        => array(
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\entities\shortcodes\EspressoEvents'                                                => array(
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\entities\shortcodes\EspressoThankYou'                                              => array(
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\entities\shortcodes\EspressoTicketSelector'                                        => array(
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\entities\shortcodes\EspressoTxnPage'                                               => array(
-                'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\cache\BasicCacheManager'                        => array(
-                'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\cache\PostRelatedCacheManager'                  => array(
-                'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\services\validation\email\EmailValidationService' => array(
-                'EE_Registration_Config'                                  => EE_Dependency_Map::load_from_cache,
-                'EventEspresso\core\services\loaders\Loader'              => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\values\EmailAddress'                              => array(
-                null,
-                'EventEspresso\core\domain\services\validation\email\EmailValidationService' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\orm\ModelFieldFactory' => array(
-                'EventEspresso\core\services\loaders\Loader'              => EE_Dependency_Map::load_from_cache,
-            ),
-            'LEGACY_MODELS'                                                   => array(
-                null,
-                'EventEspresso\core\services\database\ModelFieldFactory' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Module_Request_Router' => array(
-                'EE_Request' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Registration_Processor' => array(
-                'EE_Request' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\notifications\PersistentAdminNoticeManager' => array(
-                null,
-                'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
-                'EE_Request' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EE_Admin_Transactions_List_Table' => array(
-                null,
-                'EventEspresso\core\domain\values\session\SessionLifespan' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\domain\services\admin\ExitModal' => array(
-                'EventEspresso\core\services\assets\Registry' => EE_Dependency_Map::load_from_cache
-            ),
-            'EventEspresso\core\domain\services\admin\PluginUpsells' => array(
-                'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache
-            ),
-            'EventEspresso\caffeinated\modules\recaptcha_invisible\InvisibleRecaptcha' => array(
-                'EE_Registration_Config' => EE_Dependency_Map::load_from_cache,
-                'EE_Session'             => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\caffeinated\modules\recaptcha_invisible\RecaptchaAdminSettings' => array(
-                'EE_Registration_Config' => EE_Dependency_Map::load_from_cache,
-            ),
-            'EventEspresso\core\services\loaders\ObjectIdentifier' => array(
-                'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
-            ),
-        );
-    }
-
-
-    /**
-     * Registers how core classes are loaded.
-     * This can either be done by simply providing the name of one of the EE_Registry loader methods such as:
-     *        'EE_Request_Handler' => 'load_core'
-     *        'EE_Messages_Queue'  => 'load_lib'
-     *        'EEH_Debug_Tools'    => 'load_helper'
-     * or, if greater control is required, by providing a custom closure. For example:
-     *        'Some_Class' => function () {
-     *            return new Some_Class();
-     *        },
-     * This is required for instantiating dependencies
-     * where an interface has been type hinted in a class constructor. For example:
-     *        'Required_Interface' => function () {
-     *            return new A_Class_That_Implements_Required_Interface();
-     *        },
-     *
-     */
-    protected function _register_core_class_loaders()
-    {
-        //for PHP5.3 compat, we need to register any properties called here in a variable because `$this` cannot
-        //be used in a closure.
-        $request = &$this->request;
-        $response = &$this->response;
-        $legacy_request = &$this->legacy_request;
-        // $loader = &$this->loader;
-        $this->_class_loaders = array(
-            //load_core
-            'EE_Capabilities'          => 'load_core',
-            'EE_Encryption'            => 'load_core',
-            'EE_Front_Controller'      => 'load_core',
-            'EE_Module_Request_Router' => 'load_core',
-            'EE_Registry'              => 'load_core',
-            'EE_Request'               => function () use (&$legacy_request) {
-                return $legacy_request;
-            },
-            'EventEspresso\core\services\request\Request' => function () use (&$request) {
-                return $request;
-            },
-            'EventEspresso\core\services\request\Response' => function () use (&$response) {
-                return $response;
-            },
-            'EE_Request_Handler'       => 'load_core',
-            'EE_Session'               => 'load_core',
-            'EE_Cron_Tasks'            => 'load_core',
-            'EE_System'                => 'load_core',
-            'EE_Maintenance_Mode'      => 'load_core',
-            'EE_Register_CPTs'         => 'load_core',
-            'EE_Admin'                 => 'load_core',
-            //load_lib
-            'EE_Message_Resource_Manager'          => 'load_lib',
-            'EE_Message_Type_Collection'           => 'load_lib',
-            'EE_Message_Type_Collection_Loader'    => 'load_lib',
-            'EE_Messenger_Collection'              => 'load_lib',
-            'EE_Messenger_Collection_Loader'       => 'load_lib',
-            'EE_Messages_Processor'                => 'load_lib',
-            'EE_Message_Repository'                => 'load_lib',
-            'EE_Messages_Queue'                    => 'load_lib',
-            'EE_Messages_Data_Handler_Collection'  => 'load_lib',
-            'EE_Message_Template_Group_Collection' => 'load_lib',
-            'EE_Payment_Method_Manager'            => 'load_lib',
-            'EE_Messages_Generator'                => function () {
-                return EE_Registry::instance()->load_lib(
-                    'Messages_Generator',
-                    array(),
-                    false,
-                    false
-                );
-            },
-            'EE_Messages_Template_Defaults'        => function ($arguments = array()) {
-                return EE_Registry::instance()->load_lib(
-                    'Messages_Template_Defaults',
-                    $arguments,
-                    false,
-                    false
-                );
-            },
-            //load_model
-            // 'EEM_Attendee'                         => 'load_model',
-            // 'EEM_Message_Template_Group'           => 'load_model',
-            // 'EEM_Message_Template'                 => 'load_model',
-            //load_helper
-            'EEH_Parse_Shortcodes'                 => function () {
-                if (EE_Registry::instance()->load_helper('Parse_Shortcodes')) {
-                    return new EEH_Parse_Shortcodes();
-                }
-                return null;
-            },
-            'EE_Template_Config'                   => function () {
-                return EE_Config::instance()->template_settings;
-            },
-            'EE_Currency_Config'                   => function () {
-                return EE_Config::instance()->currency;
-            },
-            'EE_Registration_Config'                   => function () {
-                return EE_Config::instance()->registration;
-            },
-            'EventEspresso\core\services\loaders\Loader' => function () {
-                return LoaderFactory::getLoader();
-            },
-            'EE_Base' => 'load_core',
-        );
-    }
-
-
-
-
-    /**
-     * can be used for supplying alternate names for classes,
-     * or for connecting interface names to instantiable classes
-     */
-    protected function _register_core_aliases()
-    {
-        $aliases = array(
-            'CommandBusInterface'                                                          => 'EventEspresso\core\services\commands\CommandBusInterface',
-            'EventEspresso\core\services\commands\CommandBusInterface'                     => 'EventEspresso\core\services\commands\CommandBus',
-            'CommandHandlerManagerInterface'                                               => 'EventEspresso\core\services\commands\CommandHandlerManagerInterface',
-            'EventEspresso\core\services\commands\CommandHandlerManagerInterface'          => 'EventEspresso\core\services\commands\CommandHandlerManager',
-            'CapChecker'                                                                   => 'EventEspresso\core\services\commands\middleware\CapChecker',
-            'AddActionHook'                                                                => 'EventEspresso\core\services\commands\middleware\AddActionHook',
-            'CapabilitiesChecker'                                                          => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
-            'CapabilitiesCheckerInterface'                                                 => 'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface',
-            'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface' => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
-            'CreateRegistrationService'                                                    => 'EventEspresso\core\domain\services\registration\CreateRegistrationService',
-            'CreateRegistrationCommandHandler'                                             => 'EventEspresso\core\services\commands\registration\CreateRegistrationCommand',
-            'CopyRegistrationDetailsCommandHandler'                                        => 'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommand',
-            'CopyRegistrationPaymentsCommandHandler'                                       => 'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommand',
-            'CancelRegistrationAndTicketLineItemCommandHandler'                            => 'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler',
-            'UpdateRegistrationAndTransactionAfterChangeCommandHandler'                    => 'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler',
-            'CreateTicketLineItemCommandHandler'                                           => 'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommand',
-            'CreateTransactionCommandHandler'                                     => 'EventEspresso\core\services\commands\transaction\CreateTransactionCommandHandler',
-            'CreateAttendeeCommandHandler'                                        => 'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler',
-            'TableManager'                                                                 => 'EventEspresso\core\services\database\TableManager',
-            'TableAnalysis'                                                                => 'EventEspresso\core\services\database\TableAnalysis',
-            'EspressoShortcode'                                                            => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
-            'ShortcodeInterface'                                                           => 'EventEspresso\core\services\shortcodes\ShortcodeInterface',
-            'EventEspresso\core\services\shortcodes\ShortcodeInterface'                    => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
-            'EventEspresso\core\services\cache\CacheStorageInterface'                      => 'EventEspresso\core\services\cache\TransientCacheStorage',
-            'LoaderInterface'                                                              => 'EventEspresso\core\services\loaders\LoaderInterface',
-            'EventEspresso\core\services\loaders\LoaderInterface'                          => 'EventEspresso\core\services\loaders\Loader',
-            'CommandFactoryInterface'                                                     => 'EventEspresso\core\services\commands\CommandFactoryInterface',
-            'EventEspresso\core\services\commands\CommandFactoryInterface'                => 'EventEspresso\core\services\commands\CommandFactory',
-            'EventEspresso\core\domain\services\session\SessionIdentifierInterface'       => 'EE_Session',
-            'EmailValidatorInterface'                                                     => 'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface',
-            'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface' => 'EventEspresso\core\domain\services\validation\email\EmailValidationService',
-            'NoticeConverterInterface'                                            => 'EventEspresso\core\services\notices\NoticeConverterInterface',
-            'EventEspresso\core\services\notices\NoticeConverterInterface'        => 'EventEspresso\core\services\notices\ConvertNoticesToEeErrors',
-            'NoticesContainerInterface'                                           => 'EventEspresso\core\services\notices\NoticesContainerInterface',
-            'EventEspresso\core\services\notices\NoticesContainerInterface'       => 'EventEspresso\core\services\notices\NoticesContainer',
-            'EventEspresso\core\services\request\RequestInterface'                => 'EventEspresso\core\services\request\Request',
-            'EventEspresso\core\services\request\ResponseInterface'               => 'EventEspresso\core\services\request\Response',
-            'EventEspresso\core\domain\DomainInterface'                           => 'EventEspresso\core\domain\Domain',
-        );
-        foreach ($aliases as $alias => $fqn) {
-            $this->class_cache->addAlias($fqn, $alias);
-        }
-        if (! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
-            $this->class_cache->addAlias(
-                'EventEspresso\core\services\notices\ConvertNoticesToAdminNotices',
-                'EventEspresso\core\services\notices\NoticeConverterInterface'
-            );
-        }
-    }
-
-
-
-    /**
-     * This is used to reset the internal map and class_loaders to their original default state at the beginning of the
-     * request Primarily used by unit tests.
-     */
-    public function reset()
-    {
-        $this->_register_core_class_loaders();
-        $this->_register_core_dependencies();
-    }
+	/**
+	 * This means that the requested class dependency is not present in the dependency map
+	 */
+	const not_registered = 0;
+
+	/**
+	 * This instructs class loaders to ALWAYS return a newly instantiated object for the requested class.
+	 */
+	const load_new_object = 1;
+
+	/**
+	 * This instructs class loaders to return a previously instantiated and cached object for the requested class.
+	 * IF a previously instantiated object does not exist, a new one will be created and added to the cache.
+	 */
+	const load_from_cache = 2;
+
+	/**
+	 * When registering a dependency,
+	 * this indicates to keep any existing dependencies that already exist,
+	 * and simply discard any new dependencies declared in the incoming data
+	 */
+	const KEEP_EXISTING_DEPENDENCIES = 0;
+
+	/**
+	 * When registering a dependency,
+	 * this indicates to overwrite any existing dependencies that already exist using the incoming data
+	 */
+	const OVERWRITE_DEPENDENCIES = 1;
+
+
+
+	/**
+	 * @type EE_Dependency_Map $_instance
+	 */
+	protected static $_instance;
+
+	/**
+	 * @var ClassInterfaceCache $class_cache
+	 */
+	private $class_cache;
+
+	/**
+	 * @type RequestInterface $request
+	 */
+	protected $request;
+
+	/**
+	 * @type LegacyRequestInterface $legacy_request
+	 */
+	protected $legacy_request;
+
+	/**
+	 * @type ResponseInterface $response
+	 */
+	protected $response;
+
+	/**
+	 * @type LoaderInterface $loader
+	 */
+	protected $loader;
+
+	/**
+	 * @type array $_dependency_map
+	 */
+	protected $_dependency_map = array();
+
+	/**
+	 * @type array $_class_loaders
+	 */
+	protected $_class_loaders = array();
+
+
+	/**
+	 * EE_Dependency_Map constructor.
+	 *
+	 * @param ClassInterfaceCache $class_cache
+	 */
+	protected function __construct(ClassInterfaceCache $class_cache)
+	{
+		$this->class_cache = $class_cache;
+		do_action('EE_Dependency_Map____construct', $this);
+	}
+
+
+	/**
+	 * @return void
+	 */
+	public function initialize()
+	{
+		$this->_register_core_dependencies();
+		$this->_register_core_class_loaders();
+		$this->_register_core_aliases();
+	}
+
+
+	/**
+	 * @singleton method used to instantiate class object
+	 * @param ClassInterfaceCache|null $class_cache
+	 * @return EE_Dependency_Map
+	 */
+	public static function instance(ClassInterfaceCache $class_cache = null) {
+		// check if class object is instantiated, and instantiated properly
+		if (
+			! self::$_instance instanceof EE_Dependency_Map
+			&& $class_cache instanceof ClassInterfaceCache
+		) {
+			self::$_instance = new EE_Dependency_Map($class_cache);
+		}
+		return self::$_instance;
+	}
+
+
+	/**
+	 * @param RequestInterface $request
+	 */
+	public function setRequest(RequestInterface $request)
+	{
+		$this->request = $request;
+	}
+
+
+	/**
+	 * @param LegacyRequestInterface $legacy_request
+	 */
+	public function setLegacyRequest(LegacyRequestInterface $legacy_request)
+	{
+		$this->legacy_request = $legacy_request;
+	}
+
+
+	/**
+	 * @param ResponseInterface $response
+	 */
+	public function setResponse(ResponseInterface $response)
+	{
+		$this->response = $response;
+	}
+
+
+
+	/**
+	 * @param LoaderInterface $loader
+	 */
+	public function setLoader(LoaderInterface $loader)
+	{
+		$this->loader = $loader;
+	}
+
+
+
+	/**
+	 * @param string $class
+	 * @param array  $dependencies
+	 * @param int    $overwrite
+	 * @return bool
+	 */
+	public static function register_dependencies(
+		$class,
+		array $dependencies,
+		$overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
+	) {
+		return self::$_instance->registerDependencies($class, $dependencies, $overwrite);
+	}
+
+
+
+	/**
+	 * Assigns an array of class names and corresponding load sources (new or cached)
+	 * to the class specified by the first parameter.
+	 * IMPORTANT !!!
+	 * The order of elements in the incoming $dependencies array MUST match
+	 * the order of the constructor parameters for the class in question.
+	 * This is especially important when overriding any existing dependencies that are registered.
+	 * the third parameter controls whether any duplicate dependencies are overwritten or not.
+	 *
+	 * @param string $class
+	 * @param array  $dependencies
+	 * @param int    $overwrite
+	 * @return bool
+	 */
+	public function registerDependencies(
+		$class,
+		array $dependencies,
+		$overwrite = EE_Dependency_Map::KEEP_EXISTING_DEPENDENCIES
+	) {
+		$class = trim($class, '\\');
+		$registered = false;
+		if (empty(self::$_instance->_dependency_map[ $class ])) {
+			self::$_instance->_dependency_map[ $class ] = array();
+		}
+		// we need to make sure that any aliases used when registering a dependency
+		// get resolved to the correct class name
+		foreach ($dependencies as $dependency => $load_source) {
+			$alias = self::$_instance->get_alias($dependency);
+			if (
+				$overwrite === EE_Dependency_Map::OVERWRITE_DEPENDENCIES
+				|| ! isset(self::$_instance->_dependency_map[ $class ][ $alias ])
+			) {
+				unset($dependencies[$dependency]);
+				$dependencies[$alias] = $load_source;
+				$registered = true;
+			}
+		}
+		// now add our two lists of dependencies together.
+		// using Union (+=) favours the arrays in precedence from left to right,
+		// so $dependencies is NOT overwritten because it is listed first
+		// ie: with A = B + C, entries in B take precedence over duplicate entries in C
+		// Union is way faster than array_merge() but should be used with caution...
+		// especially with numerically indexed arrays
+		$dependencies += self::$_instance->_dependency_map[ $class ];
+		// now we need to ensure that the resulting dependencies
+		// array only has the entries that are required for the class
+		// so first count how many dependencies were originally registered for the class
+		$dependency_count = count(self::$_instance->_dependency_map[ $class ]);
+		// if that count is non-zero (meaning dependencies were already registered)
+		self::$_instance->_dependency_map[ $class ] = $dependency_count
+			// then truncate the  final array to match that count
+			? array_slice($dependencies, 0, $dependency_count)
+			// otherwise just take the incoming array because nothing previously existed
+			: $dependencies;
+		return $registered;
+	}
+
+
+
+	/**
+	 * @param string $class_name
+	 * @param string $loader
+	 * @return bool
+	 * @throws DomainException
+	 */
+	public static function register_class_loader($class_name, $loader = 'load_core')
+	{
+		if (! $loader instanceof Closure && strpos($class_name, '\\') !== false) {
+			throw new DomainException(
+				esc_html__('Don\'t use class loaders for FQCNs.', 'event_espresso')
+			);
+		}
+		// check that loader is callable or method starts with "load_" and exists in EE_Registry
+		if (
+			! is_callable($loader)
+			&& (
+				strpos($loader, 'load_') !== 0
+				|| ! method_exists('EE_Registry', $loader)
+			)
+		) {
+			throw new DomainException(
+				sprintf(
+					esc_html__(
+						'"%1$s" is not a valid loader method on EE_Registry.',
+						'event_espresso'
+					),
+					$loader
+				)
+			);
+		}
+		$class_name = self::$_instance->get_alias($class_name);
+		if (! isset(self::$_instance->_class_loaders[$class_name])) {
+			self::$_instance->_class_loaders[$class_name] = $loader;
+			return true;
+		}
+		return false;
+	}
+
+
+
+	/**
+	 * @return array
+	 */
+	public function dependency_map()
+	{
+		return $this->_dependency_map;
+	}
+
+
+
+	/**
+	 * returns TRUE if dependency map contains a listing for the provided class name
+	 *
+	 * @param string $class_name
+	 * @return boolean
+	 */
+	public function has($class_name = '')
+	{
+		// all legacy models have the same dependencies
+		if (strpos($class_name, 'EEM_') === 0) {
+			$class_name = 'LEGACY_MODELS';
+		}
+		return isset($this->_dependency_map[$class_name]) ? true : false;
+	}
+
+
+
+	/**
+	 * returns TRUE if dependency map contains a listing for the provided class name AND dependency
+	 *
+	 * @param string $class_name
+	 * @param string $dependency
+	 * @return bool
+	 */
+	public function has_dependency_for_class($class_name = '', $dependency = '')
+	{
+		// all legacy models have the same dependencies
+		if (strpos($class_name, 'EEM_') === 0) {
+			$class_name = 'LEGACY_MODELS';
+		}
+		$dependency = $this->get_alias($dependency);
+		return isset($this->_dependency_map[$class_name][$dependency])
+			? true
+			: false;
+	}
+
+
+
+	/**
+	 * returns loading strategy for whether a previously cached dependency should be loaded or a new instance returned
+	 *
+	 * @param string $class_name
+	 * @param string $dependency
+	 * @return int
+	 */
+	public function loading_strategy_for_class_dependency($class_name = '', $dependency = '')
+	{
+		// all legacy models have the same dependencies
+		if (strpos($class_name, 'EEM_') === 0) {
+			$class_name = 'LEGACY_MODELS';
+		}
+		$dependency = $this->get_alias($dependency);
+		return $this->has_dependency_for_class($class_name, $dependency)
+			? $this->_dependency_map[$class_name][$dependency]
+			: EE_Dependency_Map::not_registered;
+	}
+
+
+
+	/**
+	 * @param string $class_name
+	 * @return string | Closure
+	 */
+	public function class_loader($class_name)
+	{
+		// all legacy models use load_model()
+		if(strpos($class_name, 'EEM_') === 0){
+			return 'load_model';
+		}
+		$class_name = $this->get_alias($class_name);
+		return isset($this->_class_loaders[$class_name]) ? $this->_class_loaders[$class_name] : '';
+	}
+
+
+
+	/**
+	 * @return array
+	 */
+	public function class_loaders()
+	{
+		return $this->_class_loaders;
+	}
+
+
+
+	/**
+	 * adds an alias for a classname
+	 *
+	 * @param string $fqcn      the class name that should be used (concrete class to replace interface)
+	 * @param string $alias     the class name that would be type hinted for (abstract parent or interface)
+	 * @param string $for_class the class that has the dependency (is type hinting for the interface)
+	 */
+	public function add_alias($fqcn, $alias, $for_class = '')
+	{
+		$this->class_cache->addAlias($alias, $fqcn, $for_class);
+	}
+
+
+
+	/**
+	 * PLZ NOTE: a better name for this method would be is_alias()
+	 * because it returns TRUE if the provided fully qualified name IS an alias
+	 *
+	 * @param string $fqn
+	 * @param string $for_class
+	 * @return bool
+	 */
+	public function has_alias($fqn = '', $for_class = '')
+	{
+		return $this->class_cache->isAlias($fqn, $for_class);
+	}
+
+
+
+	/**
+	 * PLZ NOTE: a better name for this method would be get_fqn_for_alias()
+	 * because it returns a FQN for provided alias if one exists, otherwise returns the original $alias
+	 * functions recursively, so that multiple aliases can be used to drill down to a FQN
+	 *  for example:
+	 *      if the following two entries were added to the _aliases array:
+	 *          array(
+	 *              'interface_alias'           => 'some\namespace\interface'
+	 *              'some\namespace\interface'  => 'some\namespace\classname'
+	 *          )
+	 *      then one could use EE_Registry::instance()->create( 'interface_alias' )
+	 *      to load an instance of 'some\namespace\classname'
+	 *
+	 * @param string $alias
+	 * @param string $for_class
+	 * @return string
+	 */
+	public function get_alias($alias = '', $for_class = '')
+	{
+		return (string) $this->class_cache->getFqnForAlias($alias, $for_class);
+	}
+
+
+
+	/**
+	 * Registers the core dependencies and whether a previously instantiated object should be loaded from the cache,
+	 * if one exists, or whether a new object should be generated every time the requested class is loaded.
+	 * This is done by using the following class constants:
+	 *        EE_Dependency_Map::load_from_cache - loads previously instantiated object
+	 *        EE_Dependency_Map::load_new_object - generates a new object every time
+	 */
+	protected function _register_core_dependencies()
+	{
+		$this->_dependency_map = array(
+			'EE_Request_Handler'                                                                                          => array(
+				'EE_Request' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_System'                                                                                                   => array(
+				'EE_Registry'                                 => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader'  => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request' => EE_Dependency_Map::load_from_cache,
+				'EE_Maintenance_Mode'                         => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Session'                                                                                                  => array(
+				'EventEspresso\core\services\cache\TransientCacheStorage'  => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\domain\values\session\SessionLifespan' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\request\Request'              => EE_Dependency_Map::load_from_cache,
+				'EE_Encryption'                                            => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Cart'                                                                                                     => array(
+				'EE_Session' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Front_Controller'                                                                                         => array(
+				'EE_Registry'              => EE_Dependency_Map::load_from_cache,
+				'EE_Request_Handler'       => EE_Dependency_Map::load_from_cache,
+				'EE_Module_Request_Router' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Messenger_Collection_Loader'                                                                              => array(
+				'EE_Messenger_Collection' => EE_Dependency_Map::load_new_object,
+			),
+			'EE_Message_Type_Collection_Loader'                                                                           => array(
+				'EE_Message_Type_Collection' => EE_Dependency_Map::load_new_object,
+			),
+			'EE_Message_Resource_Manager'                                                                                 => array(
+				'EE_Messenger_Collection_Loader'    => EE_Dependency_Map::load_new_object,
+				'EE_Message_Type_Collection_Loader' => EE_Dependency_Map::load_new_object,
+				'EEM_Message_Template_Group'        => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Message_Factory'                                                                                          => array(
+				'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_messages'                                                                                                 => array(
+				'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Messages_Generator'                                                                                       => array(
+				'EE_Messages_Queue'                    => EE_Dependency_Map::load_new_object,
+				'EE_Messages_Data_Handler_Collection'  => EE_Dependency_Map::load_new_object,
+				'EE_Message_Template_Group_Collection' => EE_Dependency_Map::load_new_object,
+				'EEH_Parse_Shortcodes'                 => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Messages_Processor'                                                                                       => array(
+				'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Messages_Queue'                                                                                           => array(
+				'EE_Message_Repository' => EE_Dependency_Map::load_new_object,
+			),
+			'EE_Messages_Template_Defaults'                                                                               => array(
+				'EEM_Message_Template_Group' => EE_Dependency_Map::load_from_cache,
+				'EEM_Message_Template'       => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Message_To_Generate_From_Request'                                                                         => array(
+				'EE_Message_Resource_Manager' => EE_Dependency_Map::load_from_cache,
+				'EE_Request_Handler'          => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\CommandBus'                                                             => array(
+				'EventEspresso\core\services\commands\CommandHandlerManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\services\commands\CommandHandler'                                                              => array(
+				'EE_Registry'         => EE_Dependency_Map::load_from_cache,
+				'CommandBusInterface' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\CommandHandlerManager'                                                  => array(
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\CompositeCommandHandler'                                                => array(
+				'EventEspresso\core\services\commands\CommandBus'     => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\commands\CommandFactory' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\CommandFactory'                                                         => array(
+				'EventEspresso\core\services\loaders\Loader' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\middleware\CapChecker'                                                  => array(
+				'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker'                                         => array(
+				'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\services\capabilities\RegistrationsCapChecker'                                     => array(
+				'EE_Capabilities' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\registration\CreateRegistrationCommandHandler'                          => array(
+				'EventEspresso\core\domain\services\registration\CreateRegistrationService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommandHandler'                     => array(
+				'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommandHandler'                    => array(
+				'EventEspresso\core\domain\services\registration\CopyRegistrationService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler'         => array(
+				'EventEspresso\core\domain\services\registration\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler' => array(
+				'EventEspresso\core\domain\services\registration\UpdateRegistrationService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommandHandler'                              => array(
+				'EventEspresso\core\domain\services\ticket\CreateTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\ticket\CancelTicketLineItemCommandHandler'                              => array(
+				'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\services\registration\CancelRegistrationService'                                   => array(
+				'EventEspresso\core\domain\services\ticket\CancelTicketLineItemService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler'                                  => array(
+				'EEM_Attendee' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\database\TableManager'                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Data_Migration_Class_Base'                                                                                => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_1_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_2_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_3_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_4_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_5_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_6_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_7_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_8_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_DMS_Core_4_9_0'                                                                                           => array(
+				'EventEspresso\core\services\database\TableAnalysis' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\database\TableManager'  => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\assets\Registry'                                                                 => array(
+				'EE_Template_Config' => EE_Dependency_Map::load_from_cache,
+				'EE_Currency_Config' => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache
+			),
+			'EventEspresso\core\domain\entities\shortcodes\EspressoCancelled'                                             => array(
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\entities\shortcodes\EspressoCheckout'                                              => array(
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\entities\shortcodes\EspressoEventAttendees'                                        => array(
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\entities\shortcodes\EspressoEvents'                                                => array(
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\entities\shortcodes\EspressoThankYou'                                              => array(
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\entities\shortcodes\EspressoTicketSelector'                                        => array(
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\entities\shortcodes\EspressoTxnPage'                                               => array(
+				'EventEspresso\core\services\cache\PostRelatedCacheManager' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\cache\BasicCacheManager'                        => array(
+				'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\cache\PostRelatedCacheManager'                  => array(
+				'EventEspresso\core\services\cache\TransientCacheStorage' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\services\validation\email\EmailValidationService' => array(
+				'EE_Registration_Config'                                  => EE_Dependency_Map::load_from_cache,
+				'EventEspresso\core\services\loaders\Loader'              => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\values\EmailAddress'                              => array(
+				null,
+				'EventEspresso\core\domain\services\validation\email\EmailValidationService' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\orm\ModelFieldFactory' => array(
+				'EventEspresso\core\services\loaders\Loader'              => EE_Dependency_Map::load_from_cache,
+			),
+			'LEGACY_MODELS'                                                   => array(
+				null,
+				'EventEspresso\core\services\database\ModelFieldFactory' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Module_Request_Router' => array(
+				'EE_Request' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Registration_Processor' => array(
+				'EE_Request' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\notifications\PersistentAdminNoticeManager' => array(
+				null,
+				'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker' => EE_Dependency_Map::load_from_cache,
+				'EE_Request' => EE_Dependency_Map::load_from_cache,
+			),
+			'EE_Admin_Transactions_List_Table' => array(
+				null,
+				'EventEspresso\core\domain\values\session\SessionLifespan' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\domain\services\admin\ExitModal' => array(
+				'EventEspresso\core\services\assets\Registry' => EE_Dependency_Map::load_from_cache
+			),
+			'EventEspresso\core\domain\services\admin\PluginUpsells' => array(
+				'EventEspresso\core\domain\Domain' => EE_Dependency_Map::load_from_cache
+			),
+			'EventEspresso\caffeinated\modules\recaptcha_invisible\InvisibleRecaptcha' => array(
+				'EE_Registration_Config' => EE_Dependency_Map::load_from_cache,
+				'EE_Session'             => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\caffeinated\modules\recaptcha_invisible\RecaptchaAdminSettings' => array(
+				'EE_Registration_Config' => EE_Dependency_Map::load_from_cache,
+			),
+			'EventEspresso\core\services\loaders\ObjectIdentifier' => array(
+				'EventEspresso\core\services\loaders\ClassInterfaceCache' => EE_Dependency_Map::load_from_cache,
+			),
+		);
+	}
+
+
+	/**
+	 * Registers how core classes are loaded.
+	 * This can either be done by simply providing the name of one of the EE_Registry loader methods such as:
+	 *        'EE_Request_Handler' => 'load_core'
+	 *        'EE_Messages_Queue'  => 'load_lib'
+	 *        'EEH_Debug_Tools'    => 'load_helper'
+	 * or, if greater control is required, by providing a custom closure. For example:
+	 *        'Some_Class' => function () {
+	 *            return new Some_Class();
+	 *        },
+	 * This is required for instantiating dependencies
+	 * where an interface has been type hinted in a class constructor. For example:
+	 *        'Required_Interface' => function () {
+	 *            return new A_Class_That_Implements_Required_Interface();
+	 *        },
+	 *
+	 */
+	protected function _register_core_class_loaders()
+	{
+		//for PHP5.3 compat, we need to register any properties called here in a variable because `$this` cannot
+		//be used in a closure.
+		$request = &$this->request;
+		$response = &$this->response;
+		$legacy_request = &$this->legacy_request;
+		// $loader = &$this->loader;
+		$this->_class_loaders = array(
+			//load_core
+			'EE_Capabilities'          => 'load_core',
+			'EE_Encryption'            => 'load_core',
+			'EE_Front_Controller'      => 'load_core',
+			'EE_Module_Request_Router' => 'load_core',
+			'EE_Registry'              => 'load_core',
+			'EE_Request'               => function () use (&$legacy_request) {
+				return $legacy_request;
+			},
+			'EventEspresso\core\services\request\Request' => function () use (&$request) {
+				return $request;
+			},
+			'EventEspresso\core\services\request\Response' => function () use (&$response) {
+				return $response;
+			},
+			'EE_Request_Handler'       => 'load_core',
+			'EE_Session'               => 'load_core',
+			'EE_Cron_Tasks'            => 'load_core',
+			'EE_System'                => 'load_core',
+			'EE_Maintenance_Mode'      => 'load_core',
+			'EE_Register_CPTs'         => 'load_core',
+			'EE_Admin'                 => 'load_core',
+			//load_lib
+			'EE_Message_Resource_Manager'          => 'load_lib',
+			'EE_Message_Type_Collection'           => 'load_lib',
+			'EE_Message_Type_Collection_Loader'    => 'load_lib',
+			'EE_Messenger_Collection'              => 'load_lib',
+			'EE_Messenger_Collection_Loader'       => 'load_lib',
+			'EE_Messages_Processor'                => 'load_lib',
+			'EE_Message_Repository'                => 'load_lib',
+			'EE_Messages_Queue'                    => 'load_lib',
+			'EE_Messages_Data_Handler_Collection'  => 'load_lib',
+			'EE_Message_Template_Group_Collection' => 'load_lib',
+			'EE_Payment_Method_Manager'            => 'load_lib',
+			'EE_Messages_Generator'                => function () {
+				return EE_Registry::instance()->load_lib(
+					'Messages_Generator',
+					array(),
+					false,
+					false
+				);
+			},
+			'EE_Messages_Template_Defaults'        => function ($arguments = array()) {
+				return EE_Registry::instance()->load_lib(
+					'Messages_Template_Defaults',
+					$arguments,
+					false,
+					false
+				);
+			},
+			//load_model
+			// 'EEM_Attendee'                         => 'load_model',
+			// 'EEM_Message_Template_Group'           => 'load_model',
+			// 'EEM_Message_Template'                 => 'load_model',
+			//load_helper
+			'EEH_Parse_Shortcodes'                 => function () {
+				if (EE_Registry::instance()->load_helper('Parse_Shortcodes')) {
+					return new EEH_Parse_Shortcodes();
+				}
+				return null;
+			},
+			'EE_Template_Config'                   => function () {
+				return EE_Config::instance()->template_settings;
+			},
+			'EE_Currency_Config'                   => function () {
+				return EE_Config::instance()->currency;
+			},
+			'EE_Registration_Config'                   => function () {
+				return EE_Config::instance()->registration;
+			},
+			'EventEspresso\core\services\loaders\Loader' => function () {
+				return LoaderFactory::getLoader();
+			},
+			'EE_Base' => 'load_core',
+		);
+	}
+
+
+
+
+	/**
+	 * can be used for supplying alternate names for classes,
+	 * or for connecting interface names to instantiable classes
+	 */
+	protected function _register_core_aliases()
+	{
+		$aliases = array(
+			'CommandBusInterface'                                                          => 'EventEspresso\core\services\commands\CommandBusInterface',
+			'EventEspresso\core\services\commands\CommandBusInterface'                     => 'EventEspresso\core\services\commands\CommandBus',
+			'CommandHandlerManagerInterface'                                               => 'EventEspresso\core\services\commands\CommandHandlerManagerInterface',
+			'EventEspresso\core\services\commands\CommandHandlerManagerInterface'          => 'EventEspresso\core\services\commands\CommandHandlerManager',
+			'CapChecker'                                                                   => 'EventEspresso\core\services\commands\middleware\CapChecker',
+			'AddActionHook'                                                                => 'EventEspresso\core\services\commands\middleware\AddActionHook',
+			'CapabilitiesChecker'                                                          => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
+			'CapabilitiesCheckerInterface'                                                 => 'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface',
+			'EventEspresso\core\domain\services\capabilities\CapabilitiesCheckerInterface' => 'EventEspresso\core\domain\services\capabilities\CapabilitiesChecker',
+			'CreateRegistrationService'                                                    => 'EventEspresso\core\domain\services\registration\CreateRegistrationService',
+			'CreateRegistrationCommandHandler'                                             => 'EventEspresso\core\services\commands\registration\CreateRegistrationCommand',
+			'CopyRegistrationDetailsCommandHandler'                                        => 'EventEspresso\core\services\commands\registration\CopyRegistrationDetailsCommand',
+			'CopyRegistrationPaymentsCommandHandler'                                       => 'EventEspresso\core\services\commands\registration\CopyRegistrationPaymentsCommand',
+			'CancelRegistrationAndTicketLineItemCommandHandler'                            => 'EventEspresso\core\services\commands\registration\CancelRegistrationAndTicketLineItemCommandHandler',
+			'UpdateRegistrationAndTransactionAfterChangeCommandHandler'                    => 'EventEspresso\core\services\commands\registration\UpdateRegistrationAndTransactionAfterChangeCommandHandler',
+			'CreateTicketLineItemCommandHandler'                                           => 'EventEspresso\core\services\commands\ticket\CreateTicketLineItemCommand',
+			'CreateTransactionCommandHandler'                                     => 'EventEspresso\core\services\commands\transaction\CreateTransactionCommandHandler',
+			'CreateAttendeeCommandHandler'                                        => 'EventEspresso\core\services\commands\attendee\CreateAttendeeCommandHandler',
+			'TableManager'                                                                 => 'EventEspresso\core\services\database\TableManager',
+			'TableAnalysis'                                                                => 'EventEspresso\core\services\database\TableAnalysis',
+			'EspressoShortcode'                                                            => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
+			'ShortcodeInterface'                                                           => 'EventEspresso\core\services\shortcodes\ShortcodeInterface',
+			'EventEspresso\core\services\shortcodes\ShortcodeInterface'                    => 'EventEspresso\core\services\shortcodes\EspressoShortcode',
+			'EventEspresso\core\services\cache\CacheStorageInterface'                      => 'EventEspresso\core\services\cache\TransientCacheStorage',
+			'LoaderInterface'                                                              => 'EventEspresso\core\services\loaders\LoaderInterface',
+			'EventEspresso\core\services\loaders\LoaderInterface'                          => 'EventEspresso\core\services\loaders\Loader',
+			'CommandFactoryInterface'                                                     => 'EventEspresso\core\services\commands\CommandFactoryInterface',
+			'EventEspresso\core\services\commands\CommandFactoryInterface'                => 'EventEspresso\core\services\commands\CommandFactory',
+			'EventEspresso\core\domain\services\session\SessionIdentifierInterface'       => 'EE_Session',
+			'EmailValidatorInterface'                                                     => 'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface',
+			'EventEspresso\core\domain\services\validation\email\EmailValidatorInterface' => 'EventEspresso\core\domain\services\validation\email\EmailValidationService',
+			'NoticeConverterInterface'                                            => 'EventEspresso\core\services\notices\NoticeConverterInterface',
+			'EventEspresso\core\services\notices\NoticeConverterInterface'        => 'EventEspresso\core\services\notices\ConvertNoticesToEeErrors',
+			'NoticesContainerInterface'                                           => 'EventEspresso\core\services\notices\NoticesContainerInterface',
+			'EventEspresso\core\services\notices\NoticesContainerInterface'       => 'EventEspresso\core\services\notices\NoticesContainer',
+			'EventEspresso\core\services\request\RequestInterface'                => 'EventEspresso\core\services\request\Request',
+			'EventEspresso\core\services\request\ResponseInterface'               => 'EventEspresso\core\services\request\Response',
+			'EventEspresso\core\domain\DomainInterface'                           => 'EventEspresso\core\domain\Domain',
+		);
+		foreach ($aliases as $alias => $fqn) {
+			$this->class_cache->addAlias($fqn, $alias);
+		}
+		if (! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
+			$this->class_cache->addAlias(
+				'EventEspresso\core\services\notices\ConvertNoticesToAdminNotices',
+				'EventEspresso\core\services\notices\NoticeConverterInterface'
+			);
+		}
+	}
+
+
+
+	/**
+	 * This is used to reset the internal map and class_loaders to their original default state at the beginning of the
+	 * request Primarily used by unit tests.
+	 */
+	public function reset()
+	{
+		$this->_register_core_class_loaders();
+		$this->_register_core_dependencies();
+	}
 
 
 }