ClassInfo::ancestry() - Code Metrics - silverstripe/silverstripe-framework - Measure and Improve Code Quality continuously with Scrutinizer

ClassInfo::ancestry() B
last analyzed 2020-06-18 12:14 UTC

↳ Parent: ClassInfo

Complexity

Conditions	7
Paths	4

Size

Total Lines	23
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	7
eloc	14
nc	4
nop	2
dl	0
loc	23
rs	8.8333
c	0
b	0
f	0

<?php

namespace SilverStripe\Core;

use Exception;
use ReflectionClass;
use SilverStripe\CMS\Model\SiteTree;
filter:
    dependency_paths: ["lib/*"]
use SilverStripe\Control\Director;
use SilverStripe\Core\Manifest\ClassLoader;
use SilverStripe\Dev\Deprecation;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\DB;

/**
 * Provides introspection information about the class tree.
 *
 * It's a cached wrapper around the built-in class functions.  SilverStripe uses
 * class introspection heavily and without the caching it creates an unfortunate
 * performance hit.
 */
class ClassInfo
{
    /**
     * Cache for {@link hasTable()}
     *
     * @internal
     * @var array
     */
    private static $_cache_all_tables = array();

    /**
     * @internal
     * @var array Cache for {@link ancestry()}.
     */
    private static $_cache_ancestry = array();

    /**
     * Cache for parse_class_spec
     *
     * @internal
     * @var array
     */
    private static $_cache_parse = [];

    /**
     * Cache for has_method_from
     *
     * @internal
     * @var array
     */
    private static $_cache_methods = array();

    /**
     * Cache for class_name
     *
     * @internal
     * @var array
     */
    private static $_cache_class_names = [];

    /**
     * Wrapper for classes getter.
     *
     * @return array List of all class names
     */
    public static function allClasses()
    {
        return ClassLoader::inst()->getManifest()->getClassNames();
    }

    /**
     * Returns true if a class or interface name exists.
     *
     * @param string $class
     * @return bool
     */
    public static function exists($class)
    {
        return class_exists($class, false)
            || interface_exists($class, false)
            || ClassLoader::inst()->getItemPath($class);
    }

    /**
     * @todo Move this to SS_Database or DB
     *
     * @param string $tableName
     * @return bool
     */
    public static function hasTable($tableName)
    {
        // Cache the list of all table names to reduce on DB traffic
        if (empty(self::$_cache_all_tables) && DB::is_active()) {
            self::$_cache_all_tables = DB::get_schema()->tableList();
        }
        return !empty(self::$_cache_all_tables[strtolower($tableName)]);
    }

    public static function reset_db_cache()
    {
        self::$_cache_all_tables = null;
        self::$_cache_ancestry = array();
    }

    /**
     * Returns the manifest of all classes which are present in the database.
     *
     * @param string $class Class name to check enum values for ClassName field
     * @param boolean $includeUnbacked Flag indicating whether or not to include
     * types that don't exist as implemented classes. By default these are excluded.
     * @return array List of subclasses
     */
    public static function getValidSubClasses($class = SiteTree::class, $includeUnbacked = false)
    {
        if (is_string($class) && !class_exists($class)) {
            return array();
        }

        $class = self::class_name($class);
        if ($includeUnbacked) {
            $table = DataObject::getSchema()->tableName($class);
            $classes = DB::get_schema()->enumValuesForField($table, 'ClassName');
        } else {
            $classes = static::subclassesFor($class);
        }
        return $classes;
    }

    /**
     * Returns an array of the current class and all its ancestors and children
     * which require a DB table.
     *
     * @todo Move this into {@see DataObjectSchema}
     *
     * @param string|object $nameOrObject Class or object instance
     * @return array
     */
    public static function dataClassesFor($nameOrObject)
    {
        if (is_string($nameOrObject) && !class_exists($nameOrObject)) {
            return [];
        }

        // Get all classes
        $class = self::class_name($nameOrObject);
        $classes = array_merge(
            self::ancestry($class),
            self::subclassesFor($class)
        );

        // Filter by table
        return array_filter($classes, function ($next) {
            return DataObject::getSchema()->classHasTable($next);
        });
    }

    /**
     * @deprecated 4.0.0:5.0.0
     * @param string $class
     * @return string
     */
    public static function baseDataClass($class)
    {
        Deprecation::notice('5.0', 'Use DataObject::getSchema()->baseDataClass()');
        return DataObject::getSchema()->baseDataClass($class);
    }

    /**
     * Returns a list of classes that inherit from the given class.
     * The resulting array includes the base class passed
     * through the $class parameter as the first array value.
     * Note that keys are lowercase, while the values are correct case.
     *
     * Example usage:
     * <code>
     * ClassInfo::subclassesFor('BaseClass');
     *  array(
     *  'baseclass' => 'BaseClass',
     *  'childclass' => 'ChildClass',
     *  'grandchildclass' => 'GrandChildClass'
     * )
     * </code>
     *
     * @param string|object $nameOrObject The classname or object
     * @param bool $includeBaseClass Whether to include the base class or not. Defaults to true.
     * @return array List of class names with lowercase keys and correct-case values
     * @throws \ReflectionException
     */
    public static function subclassesFor($nameOrObject, $includeBaseClass = true)
    {
        if (is_string($nameOrObject) && !class_exists($nameOrObject)) {
            return [];
        }

        // Get class names
        $className = self::class_name($nameOrObject);
        $lowerClassName = strtolower($className);

        // Merge with descendants
        $descendants = ClassLoader::inst()->getManifest()->getDescendantsOf($className);
        return array_merge(
            $includeBaseClass ? [$lowerClassName => $className] : [],
            $descendants
        );
    }

    /**
     * Convert a class name in any case and return it as it was defined in PHP
     *
     * eg: self::class_name('dataobJEct'); //returns 'DataObject'
     *
     * @param string|object $nameOrObject The classname or object you want to normalise
     * @throws \ReflectionException
     * @return string The normalised class name
     */
    public static function class_name($nameOrObject)
    {
        if (is_object($nameOrObject)) {
            return get_class($nameOrObject);
        }

        $key = strtolower($nameOrObject);
        if (!isset(static::$_cache_class_names[$key])) {

            // Get manifest name
            $name = ClassLoader::inst()->getManifest()->getItemName($nameOrObject);

            // Use reflection for non-manifest classes
            if (!$name) {
                $reflection = new ReflectionClass($nameOrObject);
                $name = $reflection->getName();
            }
            static::$_cache_class_names[$key] = $name;
        }

        return static::$_cache_class_names[$key];
    }

    /**
     * Returns the passed class name along with all its parent class names in an
     * array, sorted with the root class first.
     *
     * @param string|object $nameOrObject Class or object instance
     * @param bool $tablesOnly Only return classes that have a table in the db.
     * @return array List of class names with lowercase keys and correct-case values
     */
    public static function ancestry($nameOrObject, $tablesOnly = false)
    {
        if (is_string($nameOrObject) && !class_exists($nameOrObject)) {
            return [];
        }

        $class = self::class_name($nameOrObject);

        $lowerClass = strtolower($class);

        $cacheKey = $lowerClass . '_' . (string)$tablesOnly;
        $parent = $class;
        if (!isset(self::$_cache_ancestry[$cacheKey])) {
            $ancestry = [];
            do {
                if (!$tablesOnly || DataObject::getSchema()->classHasTable($parent)) {
                    $ancestry[strtolower($parent)] = $parent;
                }
            } while ($parent = get_parent_class($parent));
            self::$_cache_ancestry[$cacheKey] = array_reverse($ancestry);
        }

        return self::$_cache_ancestry[$cacheKey];
    }

    /**
     * @param string $interfaceName
     * @return array A self-keyed array of class names with lowercase keys and correct-case values.
     * Note that this is only available with Silverstripe classes and not built-in PHP classes.
     */
    public static function implementorsOf($interfaceName)
    {
        return ClassLoader::inst()->getManifest()->getImplementorsOf($interfaceName);
    }

    /**
     * Returns true if the given class implements the given interface
     *
     * @param string $className
     * @param string $interfaceName
     * @return bool
     */
    public static function classImplements($className, $interfaceName)
    {
        $lowerClassName = strtolower($className);
        $implementors = self::implementorsOf($interfaceName);
        return isset($implementors[$lowerClassName]);
    }

    /**
     * Get all classes contained in a file.
     *
     * @param string $filePath Path to a PHP file (absolute or relative to webroot)
     * @return array Map of lowercase class names to correct class name
     */
    public static function classes_for_file($filePath)
    {
        $absFilePath = Director::getAbsFile($filePath);
        $classManifest = ClassLoader::inst()->getManifest();
        $classes = $classManifest->getClasses();
        $classNames = $classManifest->getClassNames();

        $matchedClasses = [];
        foreach ($classes as $lowerClass => $compareFilePath) {
            if (strcasecmp($absFilePath, $compareFilePath) === 0) {
                $matchedClasses[$lowerClass] = $classNames[$lowerClass];
            }
        }

        return $matchedClasses;
    }

    /**
     * Returns all classes contained in a certain folder.
     *
     * @param string $folderPath Relative or absolute folder path
     * @return array Map of lowercase class names to correct class name
     */
    public static function classes_for_folder($folderPath)
    {
        $absFolderPath = Director::getAbsFile($folderPath);
        $classManifest = ClassLoader::inst()->getManifest();
        $classes = $classManifest->getClasses();
        $classNames = $classManifest->getClassNames();

        $matchedClasses = [];
        foreach ($classes as $lowerClass => $compareFilePath) {
            if (stripos($compareFilePath, $absFolderPath) === 0) {
                $matchedClasses[$lowerClass] = $classNames[$lowerClass];
            }
        }

        return $matchedClasses;
    }

    /**
     * Determine if the given class method is implemented at the given comparison class
     *
     * @param string $class Class to get methods from
     * @param string $method Method name to lookup
     * @param string $compclass Parent class to test if this is the implementor
     * @return bool True if $class::$method is declared in $compclass
     */
    public static function has_method_from($class, $method, $compclass)
    {
        $lClass = strtolower($class);
        $lMethod = strtolower($method);
        $lCompclass = strtolower($compclass);
        if (!isset(self::$_cache_methods[$lClass])) {
            self::$_cache_methods[$lClass] = array();
        }

        if (!array_key_exists($lMethod, self::$_cache_methods[$lClass])) {
            self::$_cache_methods[$lClass][$lMethod] = false;

            $classRef = new ReflectionClass($class);

            if ($classRef->hasMethod($method)) {
                $methodRef = $classRef->getMethod($method);
                self::$_cache_methods[$lClass][$lMethod] = $methodRef->getDeclaringClass()->getName();
            }
        }

        return strtolower(self::$_cache_methods[$lClass][$lMethod]) === $lCompclass;
    }

    /**
     * @deprecated 4.0.0:5.0.0
     */
    public static function table_for_object_field($candidateClass, $fieldName)
    {
        Deprecation::notice('5.0', 'Use DataObject::getSchema()->tableForField()');
        return DataObject::getSchema()->tableForField($candidateClass, $fieldName);
    }

    /**
     * Strip namespace from class
     *
     * @param string|object $nameOrObject Name of class, or instance
     * @return string Name of class without namespace
     */
    public static function shortName($nameOrObject)
    {
        $name = static::class_name($nameOrObject);
        $parts = explode('\\', $name);
        return end($parts);
    }

    /**
     * Helper to determine if the given object has a method
     *
     * @param object $object
     * @param string $method
     * @return bool
     */
    public static function hasMethod($object, $method)
    {
        if (empty($object)) {
            return false;
        }
        if (method_exists($object, $method)) {
            return true;
        }
        return method_exists($object, 'hasMethod') && $object->hasMethod($method);
    }

    /**
     * Parses a class-spec, such as "Versioned('Stage','Live')", as passed to create_from_string().
     * Returns a 2-element array, with classname and arguments
     *
     * @param string $classSpec
     * @return array
     * @throws Exception
     */
    public static function parse_class_spec($classSpec)
    {
        if (isset(static::$_cache_parse[$classSpec])) {

            return static::$_cache_parse[$classSpec];
        }

        $tokens = token_get_all("<?php $classSpec");
        $class = null;
        $args = array();

        // Keep track of the current bucket that we're putting data into
        $bucket = &$args;
        $bucketStack = array();
        $hadNamespace = false;
        $currentKey = null;

        foreach ($tokens as $token) {
            // $forceResult used to allow null result to be detected
            $result = $forceResult = null;
            $tokenName = is_array($token) ? $token[0] : $token;

            // Get the class name
            if ($class === null && is_array($token) && $token[0] === T_STRING) {
                $class = $token[1];
            } elseif (is_array($token) && $token[0] === T_NS_SEPARATOR) {
                $class .= $token[1];
                $hadNamespace = true;
            } elseif ($token === '.') {
                // Treat service name separator as NS separator
                $class .= '.';
                $hadNamespace = true;
            } elseif ($hadNamespace && is_array($token) && $token[0] === T_STRING) {
                $class .= $token[1];
                $hadNamespace = false;
            // Get arguments
            } elseif (is_array($token)) {
                switch ($token[0]) {
                    case T_CONSTANT_ENCAPSED_STRING:
                        $argString = $token[1];
                        switch ($argString[0]) {
                            case '"':
                                $result = stripcslashes(substr($argString, 1, -1));
                                break;
                            case "'":
                                $result = str_replace(
                                    ["\\\\", "\\'"],
                                    ["\\", "'"],
                                    substr($argString, 1, -1)
                                );
                                break;
                            default:
                                throw new Exception("Bad T_CONSTANT_ENCAPSED_STRING arg $argString");
                        }

                        break;

                    case T_DNUMBER:
                        $result = (double)$token[1];
                        break;

                    case T_LNUMBER:
                        $result = (int)$token[1];
                        break;

                    case T_DOUBLE_ARROW:
                        // We've encountered an associative array (the array itself has already been
                        // added to the bucket), so the previous item added to the bucket is the key
                        end($bucket);
                        $currentKey = current($bucket);
                        array_pop($bucket);
                        break;

                    case T_STRING:
                        switch ($token[1]) {
                            case 'true':
                                $result = true;

                                break;
                            case 'false':
                                $result = false;

                                break;
                            case 'null':
                                $result = null;
                                $forceResult = true;

                                break;
                            default:
                                throw new Exception("Bad T_STRING arg '{$token[1]}'");
                        }

                        break;

                    case T_ARRAY:
                        $result = array();
                        break;
                }
            } else {
                if ($tokenName === '[') {
                    $result = array();
                } elseif (($tokenName === ')' || $tokenName === ']') && !empty($bucketStack)) {
                    // Store the bucket we're currently working on
                    $oldBucket = $bucket;
                    // Fetch the key for the bucket at the top of the stack
                    end($bucketStack);
                    $key = key($bucketStack);
                    reset($bucketStack);
                    // Re-instate the bucket from the top of the stack
                    $bucket = &$bucketStack[$key];
                    // Add our saved, "nested" bucket to the bucket we just popped off the stack
                    $bucket[$key] = $oldBucket;
                    // Remove the bucket we just popped off the stack
                    array_pop($bucketStack);
                }
            }

            // If we've got something to add to the bucket, add it
            if ($result !== null || $forceResult) {
                if ($currentKey) {
                    $bucket[$currentKey] = $result;
                    $currentKey = null;
                } else {
                    $bucket[] = $result;
                }

                // If we've just pushed an array, that becomes our new bucket
                if ($result === array()) {
                    // Fetch the key that the array was pushed to
                    end($bucket);
                    $key = key($bucket);
                    reset($bucket);
                    // Store reference to "old" bucket in the stack
                    $bucketStack[$key] = &$bucket;
                    // Set the active bucket to be our newly-pushed, empty array
                    $bucket = &$bucket[$key];
                }
            }
        }

        $result = [$class, $args];
        static::$_cache_parse[$classSpec] = $result;
        return $result;
    }
}


1			<?php
2
3			namespace SilverStripe\Core;
4
5			use Exception;
6			use ReflectionClass;
7			use SilverStripe\CMS\Model\SiteTree;
			0 ignored issues – show Bug introduced 2017-11-28 04:26 UTC by Report Bug Copy Issue Report The type `SilverStripe\CMS\Model\SiteTree` was not found. Maybe you did not declare it correctly or list all dependencies? The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g. `excluded_paths: ["lib/"]`, you can move it to the dependency path list as follows: filter: dependency_paths: ["lib/"] For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths Loading history...
8			use SilverStripe\Control\Director;
9			use SilverStripe\Core\Manifest\ClassLoader;
10			use SilverStripe\Dev\Deprecation;
11			use SilverStripe\ORM\DataObject;
12			use SilverStripe\ORM\DB;
13
14			/**
15			* Provides introspection information about the class tree.
16			*
17			* It's a cached wrapper around the built-in class functions. SilverStripe uses
18			* class introspection heavily and without the caching it creates an unfortunate
19			* performance hit.
20			*/
21			class ClassInfo
22			{
23			/**
24			* Cache for {@link hasTable()}
25			*
26			* @internal
27			* @var array
28			*/
29			private static $_cache_all_tables = array();
30
31			/**
32			* @internal
33			* @var array Cache for {@link ancestry()}.
34			*/
35			private static $_cache_ancestry = array();
36
37			/**
38			* Cache for parse_class_spec
39			*
40			* @internal
41			* @var array
42			*/
43			private static $_cache_parse = [];
44
45			/**
46			* Cache for has_method_from
47			*
48			* @internal
49			* @var array
50			*/
51			private static $_cache_methods = array();
52
53			/**
54			* Cache for class_name
55			*
56			* @internal
57			* @var array
58			*/
59			private static $_cache_class_names = [];
60
61			/**
62			* Wrapper for classes getter.
63			*
64			* @return array List of all class names
65			*/
66			public static function allClasses()
67			{
68			return ClassLoader::inst()->getManifest()->getClassNames();
69			}
70
71			/**
72			* Returns true if a class or interface name exists.
73			*
74			* @param string $class
75			* @return bool
76			*/
77			public static function exists($class)
78			{
79			return class_exists($class, false)
80			\|\| interface_exists($class, false)
81			\|\| ClassLoader::inst()->getItemPath($class);
82			}
83
84			/**
85			* @todo Move this to SS_Database or DB
86			*
87			* @param string $tableName
88			* @return bool
89			*/
90			public static function hasTable($tableName)
91			{
92			// Cache the list of all table names to reduce on DB traffic
93			if (empty(self::$_cache_all_tables) && DB::is_active()) {
94			self::$_cache_all_tables = DB::get_schema()->tableList();
95			}
96			return !empty(self::$_cache_all_tables[strtolower($tableName)]);
97			}
98
99			public static function reset_db_cache()
100			{
101			self::$_cache_all_tables = null;
102			self::$_cache_ancestry = array();
103			}
104
105			/**
106			* Returns the manifest of all classes which are present in the database.
107			*
108			* @param string $class Class name to check enum values for ClassName field
109			* @param boolean $includeUnbacked Flag indicating whether or not to include
110			* types that don't exist as implemented classes. By default these are excluded.
111			* @return array List of subclasses
112			*/
113			public static function getValidSubClasses($class = SiteTree::class, $includeUnbacked = false)
114			{
115			if (is_string($class) && !class_exists($class)) {
116			return array();
117			}
118
119			$class = self::class_name($class);
120			if ($includeUnbacked) {
121			$table = DataObject::getSchema()->tableName($class);
122			$classes = DB::get_schema()->enumValuesForField($table, 'ClassName');
123			} else {
124			$classes = static::subclassesFor($class);
125			}
126			return $classes;
127			}
128
129			/**
130			* Returns an array of the current class and all its ancestors and children
131			* which require a DB table.
132			*
133			* @todo Move this into {@see DataObjectSchema}
134			*
135			* @param string\|object $nameOrObject Class or object instance
136			* @return array
137			*/
138			public static function dataClassesFor($nameOrObject)
139			{
140			if (is_string($nameOrObject) && !class_exists($nameOrObject)) {
141			return [];
142			}
143
144			// Get all classes
145			$class = self::class_name($nameOrObject);
146			$classes = array_merge(
147			self::ancestry($class),
148			self::subclassesFor($class)
149			);
150
151			// Filter by table
152			return array_filter($classes, function ($next) {
153			return DataObject::getSchema()->classHasTable($next);
154			});
155			}
156
157			/**
158			* @deprecated 4.0.0:5.0.0
159			* @param string $class
160			* @return string
161			*/
162			public static function baseDataClass($class)
163			{
164			Deprecation::notice('5.0', 'Use DataObject::getSchema()->baseDataClass()');
165			return DataObject::getSchema()->baseDataClass($class);
166			}
167
168			/**
169			* Returns a list of classes that inherit from the given class.
170			* The resulting array includes the base class passed
171			* through the $class parameter as the first array value.
172			* Note that keys are lowercase, while the values are correct case.
173			*
174			* Example usage:
175			* <code>
176			* ClassInfo::subclassesFor('BaseClass');
177			* array(
178			* 'baseclass' => 'BaseClass',
179			* 'childclass' => 'ChildClass',
180			* 'grandchildclass' => 'GrandChildClass'
181			* )
182			* </code>
183			*
184			* @param string\|object $nameOrObject The classname or object
185			* @param bool $includeBaseClass Whether to include the base class or not. Defaults to true.
186			* @return array List of class names with lowercase keys and correct-case values
187			* @throws \ReflectionException
188			*/
189			public static function subclassesFor($nameOrObject, $includeBaseClass = true)
190			{
191			if (is_string($nameOrObject) && !class_exists($nameOrObject)) {
192			return [];
193			}
194
195			// Get class names
196			$className = self::class_name($nameOrObject);
197			$lowerClassName = strtolower($className);
198
199			// Merge with descendants
200			$descendants = ClassLoader::inst()->getManifest()->getDescendantsOf($className);
201			return array_merge(
202			$includeBaseClass ? [$lowerClassName => $className] : [],
203			$descendants
204			);
205			}
206
207			/**
208			* Convert a class name in any case and return it as it was defined in PHP
209			*
210			* eg: self::class_name('dataobJEct'); //returns 'DataObject'
211			*
212			* @param string\|object $nameOrObject The classname or object you want to normalise
213			* @throws \ReflectionException
214			* @return string The normalised class name
215			*/
216			public static function class_name($nameOrObject)
217			{
218			if (is_object($nameOrObject)) {
219			return get_class($nameOrObject);
220			}
221
222			$key = strtolower($nameOrObject);
223			if (!isset(static::$_cache_class_names[$key])) {
			0 ignored issues – show Bug introduced 2017-11-28 04:26 UTC by Report Bug Copy Issue Report Since `$_cache_class_names` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$_cache_class_names` to at least protected. Loading history...
224			// Get manifest name
225			$name = ClassLoader::inst()->getManifest()->getItemName($nameOrObject);
226
227			// Use reflection for non-manifest classes
228			if (!$name) {
229			$reflection = new ReflectionClass($nameOrObject);
230			$name = $reflection->getName();
231			}
232			static::$_cache_class_names[$key] = $name;
233			}
234
235			return static::$_cache_class_names[$key];
236			}
237
238			/**
239			* Returns the passed class name along with all its parent class names in an
240			* array, sorted with the root class first.
241			*
242			* @param string\|object $nameOrObject Class or object instance
243			* @param bool $tablesOnly Only return classes that have a table in the db.
244			* @return array List of class names with lowercase keys and correct-case values
245			*/
246			public static function ancestry($nameOrObject, $tablesOnly = false)
247			{
248			if (is_string($nameOrObject) && !class_exists($nameOrObject)) {
249			return [];
250			}
251
252			$class = self::class_name($nameOrObject);
253
254			$lowerClass = strtolower($class);
255
256			$cacheKey = $lowerClass . '_' . (string)$tablesOnly;
257			$parent = $class;
258			if (!isset(self::$_cache_ancestry[$cacheKey])) {
259			$ancestry = [];
260			do {
261			if (!$tablesOnly \|\| DataObject::getSchema()->classHasTable($parent)) {
262			$ancestry[strtolower($parent)] = $parent;
263			}
264			} while ($parent = get_parent_class($parent));
265			self::$_cache_ancestry[$cacheKey] = array_reverse($ancestry);
266			}
267
268			return self::$_cache_ancestry[$cacheKey];
269			}
270
271			/**
272			* @param string $interfaceName
273			* @return array A self-keyed array of class names with lowercase keys and correct-case values.
274			* Note that this is only available with Silverstripe classes and not built-in PHP classes.
275			*/
276			public static function implementorsOf($interfaceName)
277			{
278			return ClassLoader::inst()->getManifest()->getImplementorsOf($interfaceName);
279			}
280
281			/**
282			* Returns true if the given class implements the given interface
283			*
284			* @param string $className
285			* @param string $interfaceName
286			* @return bool
287			*/
288			public static function classImplements($className, $interfaceName)
289			{
290			$lowerClassName = strtolower($className);
291			$implementors = self::implementorsOf($interfaceName);
292			return isset($implementors[$lowerClassName]);
293			}
294
295			/**
296			* Get all classes contained in a file.
297			*
298			* @param string $filePath Path to a PHP file (absolute or relative to webroot)
299			* @return array Map of lowercase class names to correct class name
300			*/
301			public static function classes_for_file($filePath)
302			{
303			$absFilePath = Director::getAbsFile($filePath);
304			$classManifest = ClassLoader::inst()->getManifest();
305			$classes = $classManifest->getClasses();
306			$classNames = $classManifest->getClassNames();
307
308			$matchedClasses = [];
309			foreach ($classes as $lowerClass => $compareFilePath) {
310			if (strcasecmp($absFilePath, $compareFilePath) === 0) {
311			$matchedClasses[$lowerClass] = $classNames[$lowerClass];
312			}
313			}
314
315			return $matchedClasses;
316			}
317
318			/**
319			* Returns all classes contained in a certain folder.
320			*
321			* @param string $folderPath Relative or absolute folder path
322			* @return array Map of lowercase class names to correct class name
323			*/
324			public static function classes_for_folder($folderPath)
325			{
326			$absFolderPath = Director::getAbsFile($folderPath);
327			$classManifest = ClassLoader::inst()->getManifest();
328			$classes = $classManifest->getClasses();
329			$classNames = $classManifest->getClassNames();
330
331			$matchedClasses = [];
332			foreach ($classes as $lowerClass => $compareFilePath) {
333			if (stripos($compareFilePath, $absFolderPath) === 0) {
334			$matchedClasses[$lowerClass] = $classNames[$lowerClass];
335			}
336			}
337
338			return $matchedClasses;
339			}
340
341			/**
342			* Determine if the given class method is implemented at the given comparison class
343			*
344			* @param string $class Class to get methods from
345			* @param string $method Method name to lookup
346			* @param string $compclass Parent class to test if this is the implementor
347			* @return bool True if $class::$method is declared in $compclass
348			*/
349			public static function has_method_from($class, $method, $compclass)
350			{
351			$lClass = strtolower($class);
352			$lMethod = strtolower($method);
353			$lCompclass = strtolower($compclass);
354			if (!isset(self::$_cache_methods[$lClass])) {
355			self::$_cache_methods[$lClass] = array();
356			}
357
358			if (!array_key_exists($lMethod, self::$_cache_methods[$lClass])) {
359			self::$_cache_methods[$lClass][$lMethod] = false;
360
361			$classRef = new ReflectionClass($class);
362
363			if ($classRef->hasMethod($method)) {
364			$methodRef = $classRef->getMethod($method);
365			self::$_cache_methods[$lClass][$lMethod] = $methodRef->getDeclaringClass()->getName();
366			}
367			}
368
369			return strtolower(self::$_cache_methods[$lClass][$lMethod]) === $lCompclass;
370			}
371
372			/**
373			* @deprecated 4.0.0:5.0.0
374			*/
375			public static function table_for_object_field($candidateClass, $fieldName)
376			{
377			Deprecation::notice('5.0', 'Use DataObject::getSchema()->tableForField()');
378			return DataObject::getSchema()->tableForField($candidateClass, $fieldName);
379			}
380
381			/**
382			* Strip namespace from class
383			*
384			* @param string\|object $nameOrObject Name of class, or instance
385			* @return string Name of class without namespace
386			*/
387			public static function shortName($nameOrObject)
388			{
389			$name = static::class_name($nameOrObject);
390			$parts = explode('\\', $name);
391			return end($parts);
392			}
393
394			/**
395			* Helper to determine if the given object has a method
396			*
397			* @param object $object
398			* @param string $method
399			* @return bool
400			*/
401			public static function hasMethod($object, $method)
402			{
403			if (empty($object)) {
404			return false;
405			}
406			if (method_exists($object, $method)) {
407			return true;
408			}
409			return method_exists($object, 'hasMethod') && $object->hasMethod($method);
410			}
411
412			/**
413			* Parses a class-spec, such as "Versioned('Stage','Live')", as passed to create_from_string().
414			* Returns a 2-element array, with classname and arguments
415			*
416			* @param string $classSpec
417			* @return array
418			* @throws Exception
419			*/
420			public static function parse_class_spec($classSpec)
421			{
422			if (isset(static::$_cache_parse[$classSpec])) {
			0 ignored issues – show Bug introduced 2017-11-28 04:26 UTC by Report Bug Copy Issue Report Since `$_cache_parse` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$_cache_parse` to at least protected. Loading history...
423			return static::$_cache_parse[$classSpec];
424			}
425
426			$tokens = token_get_all("<?php $classSpec");
427			$class = null;
428			$args = array();
429
430			// Keep track of the current bucket that we're putting data into
431			$bucket = &$args;
432			$bucketStack = array();
433			$hadNamespace = false;
434			$currentKey = null;
435
436			foreach ($tokens as $token) {
437			// $forceResult used to allow null result to be detected
438			$result = $forceResult = null;
439			$tokenName = is_array($token) ? $token[0] : $token;
440
441			// Get the class name
442			if ($class === null && is_array($token) && $token[0] === T_STRING) {
443			$class = $token[1];
444			} elseif (is_array($token) && $token[0] === T_NS_SEPARATOR) {
445			$class .= $token[1];
446			$hadNamespace = true;
447			} elseif ($token === '.') {
448			// Treat service name separator as NS separator
449			$class .= '.';
450			$hadNamespace = true;
451			} elseif ($hadNamespace && is_array($token) && $token[0] === T_STRING) {
452			$class .= $token[1];
453			$hadNamespace = false;
454			// Get arguments
455			} elseif (is_array($token)) {
456			switch ($token[0]) {
457			case T_CONSTANT_ENCAPSED_STRING:
458			$argString = $token[1];
459			switch ($argString[0]) {
460			case '"':
461			$result = stripcslashes(substr($argString, 1, -1));
462			break;
463			case "'":
464			$result = str_replace(
465			["\\\\", "\\'"],
466			["\\", "'"],
467			substr($argString, 1, -1)
468			);
469			break;
470			default:
471			throw new Exception("Bad T_CONSTANT_ENCAPSED_STRING arg $argString");
472			}
473
474			break;
475
476			case T_DNUMBER:
477			$result = (double)$token[1];
478			break;
479
480			case T_LNUMBER:
481			$result = (int)$token[1];
482			break;
483
484			case T_DOUBLE_ARROW:
485			// We've encountered an associative array (the array itself has already been
486			// added to the bucket), so the previous item added to the bucket is the key
487			end($bucket);
488			$currentKey = current($bucket);
489			array_pop($bucket);
490			break;
491
492			case T_STRING:
493			switch ($token[1]) {
494			case 'true':
495			$result = true;
496
497			break;
498			case 'false':
499			$result = false;
500
501			break;
502			case 'null':
503			$result = null;
504			$forceResult = true;
505
506			break;
507			default:
508			throw new Exception("Bad T_STRING arg '{$token[1]}'");
509			}
510
511			break;
512
513			case T_ARRAY:
514			$result = array();
515			break;
516			}
517			} else {
518			if ($tokenName === '[') {
519			$result = array();
520			} elseif (($tokenName === ')' \|\| $tokenName === ']') && !empty($bucketStack)) {
521			// Store the bucket we're currently working on
522			$oldBucket = $bucket;
523			// Fetch the key for the bucket at the top of the stack
524			end($bucketStack);
525			$key = key($bucketStack);
526			reset($bucketStack);
527			// Re-instate the bucket from the top of the stack
528			$bucket = &$bucketStack[$key];
529			// Add our saved, "nested" bucket to the bucket we just popped off the stack
530			$bucket[$key] = $oldBucket;
531			// Remove the bucket we just popped off the stack
532			array_pop($bucketStack);
533			}
534			}
535
536			// If we've got something to add to the bucket, add it
537			if ($result !== null \|\| $forceResult) {
538			if ($currentKey) {
539			$bucket[$currentKey] = $result;
540			$currentKey = null;
541			} else {
542			$bucket[] = $result;
543			}
544
545			// If we've just pushed an array, that becomes our new bucket
546			if ($result === array()) {
547			// Fetch the key that the array was pushed to
548			end($bucket);
549			$key = key($bucket);
550			reset($bucket);
551			// Store reference to "old" bucket in the stack
552			$bucketStack[$key] = &$bucket;
553			// Set the active bucket to be our newly-pushed, empty array
554			$bucket = &$bucket[$key];
555			}
556			}
557			}
558
559			$result = [$class, $args];
560			static::$_cache_parse[$classSpec] = $result;
561			return $result;
562			}
563			}
564

silverstripe / silverstripe-framework

ClassInfo::ancestry() B last analyzed 2020-06-18 12:14 UTC

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ClassInfo::ancestry() B
last analyzed 2020-06-18 12:14 UTC