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<?php |
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namespace DICIT; |
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use \DICIT\Util\Arrays; |
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class Container |
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{ |
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/** |
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* |
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* @var mixed[] |
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*/ |
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protected $config = array(); |
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/** |
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* |
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* @var \DICIT\ArrayResolver |
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*/ |
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protected $parameters; |
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/** |
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* |
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* @var \DICIT\ArrayResolver |
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*/ |
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protected $classes; |
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/** |
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* |
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* @var \DICIT\Registry |
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*/ |
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protected $registry = null; |
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/** |
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* |
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* @var \DICIT\ActivatorFactory |
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*/ |
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protected $activatorFactory = null; |
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/** |
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* |
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* @var \DICIT\InjectorFactory |
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*/ |
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protected $injectorFactory = null; |
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/** |
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* |
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* @var \DICIT\EncapsulatorFactory |
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*/ |
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protected $encapsulatorFactory = null; |
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/** |
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* |
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* @var \DICIT\ReferenceResolver |
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*/ |
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protected $referenceResolver = null; |
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/** |
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* |
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* @param Config\AbstractConfig $cfg |
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* @param ActivatorFactory $activatorFactory |
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* @param InjectorFactory $injectorFactory |
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*/ |
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public function __construct(Config\AbstractConfig $cfg, |
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ActivatorFactory $activatorFactory = null, InjectorFactory $injectorFactory = null) |
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{ |
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$this->registry = new Registry(); |
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$this->config = new ArrayResolver($cfg->load()); |
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$this->parameters = $this->config->resolve('parameters', array()); |
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$this->classes = $this->config->resolve('classes', array()); |
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$this->activatorFactory = $activatorFactory ?: new ActivatorFactory(); |
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$this->injectorFactory = $injectorFactory ?: new InjectorFactory(); |
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$this->encapsulatorFactory = new EncapsulatorFactory(); |
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$this->referenceResolver = new ReferenceResolver($this); |
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} |
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/** |
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* Binds an existing object or an object definition to a key in the container. |
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* @param string $key The key to which the new object/definition should be bound. |
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* @param mixed $item An array or an object to bind. |
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* If $item is an object, it will be registered as a singleton in the |
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* object registry. Otherwise, $item will be handled as an object definition. |
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*/ |
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public function bind($key, $item) |
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{ |
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if (is_array($item)) { |
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$this->classes[$key] = $item; |
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} |
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else { |
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$this->registry->set($key, $item); |
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} |
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} |
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/** |
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* Set a parameter in the container on any key |
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* @param [type] $key [description] |
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* @param [type] $value [description] |
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*/ |
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public function setParameter($key, $value) |
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{ |
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$path = explode('.', $key); |
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$this->validateParameter($key, $value); |
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$root = array(); |
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$r = &$root; |
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foreach($path as $subNode) { |
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$r[$subNode] = array(); |
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$r = &$r[$subNode]; |
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} |
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$r = $value; |
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$r = &$root; |
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if ($this->parameters) { |
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$parameters = $this->parameters->extract(); |
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} |
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else { |
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$parameters = array(); |
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} |
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$this->parameters = new ArrayResolver(Arrays::mergeRecursiveUnique($parameters, $r)); |
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return $this; |
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} |
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/** |
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* Retrieve the parameter value configured in the container |
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* @param string $parameterName |
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* @return mixed |
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*/ |
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public function getParameter($parameterName) |
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{ |
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$value = $this->parameters->resolve($parameterName); |
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if ($value instanceof ArrayResolver) { |
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return $value->extract(); |
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} |
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return $value; |
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} |
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/** |
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* Retrieve a class configured in the container |
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* @param string $serviceName |
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* @return object |
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*/ |
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public function get($serviceName) |
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{ |
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if ($this->registry->has($serviceName)) { |
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return $this->registry->get($serviceName); |
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} |
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$serviceConfig = $this->classes->resolve($serviceName, null); |
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if ($serviceConfig == null) { |
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throw new \DICIT\UnknownDefinitionException($serviceName); |
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} |
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try { |
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return $this->loadService($serviceName, $serviceConfig->extract()); |
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} |
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catch (\DICIT\UnknownDefinitionException $ex) { |
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throw new \RuntimeException( |
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sprintf("Dependency '%s' not found while trying to build '%s'.", |
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$ex->getServiceName(), $serviceName)); |
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} |
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} |
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public function resolve($reference) |
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{ |
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return $this->referenceResolver->resolve($reference); |
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} |
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/** |
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* Resolves an array of references. |
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* @param array $references |
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* @return array containing all the resolved references |
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*/ |
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public function resolveMany(array $references = null) |
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{ |
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if ($references === null) { |
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return array(); |
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} |
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return $this->referenceResolver->resolveMany($references); |
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} |
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/** |
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* Flush the registry |
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* @return Container |
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*/ |
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public function flushRegistry() |
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{ |
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$this->registry->flush(); |
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return $this; |
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} |
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/** |
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* Chain of command of the class loader |
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* @param array $serviceConfig |
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* @param string $serviceName |
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* @return object |
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*/ |
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protected function loadService($serviceName, $serviceConfig) |
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{ |
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$isSingleton = false; |
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if (array_key_exists('singleton', $serviceConfig)) { |
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$isSingleton = (bool)$serviceConfig['singleton']; |
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} |
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$class = $this->activate($serviceName, $serviceConfig); |
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if ($isSingleton) { |
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// Only store if singleton'ed to spare memory |
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$this->registry->set($serviceName, $class); |
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} |
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$this->inject($class, $serviceConfig); |
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$class = $this->encapsulate($class, $serviceConfig); |
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return $class; |
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} |
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/** |
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* Handles class instanciation |
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* @param array $serviceConfig |
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* @param string $serviceName |
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* @return object |
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*/ |
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protected function activate($serviceName, $serviceConfig) |
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{ |
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$activator = $this->activatorFactory->getActivator($serviceName, $serviceConfig); |
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return $activator->createInstance($this, $serviceName, $serviceConfig); |
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} |
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/** |
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* Handle method invocations in the class |
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* @param object $class |
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* @param array $serviceConfig |
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* @return boolean |
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*/ |
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protected function inject($class, $serviceConfig) |
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{ |
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$injectors = $this->injectorFactory->getInjectors(); |
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foreach ($injectors as $injector) { |
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$injector->inject($this, $class, $serviceConfig); |
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} |
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return true; |
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} |
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/** |
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* Interceptor handler |
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* @param object $class |
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* @param array $serviceConfig |
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* @return object |
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*/ |
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protected function encapsulate($class, $serviceConfig) |
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{ |
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$encapsulators = $this->encapsulatorFactory->getEncapsulators(); |
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foreach ($encapsulators as $encapsulator) { |
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$class = $encapsulator->encapsulate($this, $class, $serviceConfig); |
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} |
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return $class; |
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} |
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/** |
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* Check that the value to bind is a scalar, or an array multi-dimensional of scalars |
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* @param string $key |
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* @param mixed $value |
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* @return boolean |
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* |
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* @throws IllegalTypeException |
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* |
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*/ |
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protected function validateParameter($key, $value) |
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{ |
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if (is_scalar($value)) { |
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return true; |
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} |
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if (is_object($value)) { |
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throw new IllegalTypeException(sprintf("Can't bind parameter %s with a callable", $key)); |
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} |
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if (is_array($value)) { |
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array_walk_recursive($value, function($item, $k) use($key) { |
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if (!is_scalar($item)) { |
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throw new IllegalTypeException( |
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sprintf("Can't bind parameter, unauthorized value on key '%s' of '%s'", $k, $key)); |
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} |
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}); |
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} |
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return true; |
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} |
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} |
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Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..