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<?php namespace Viocon; |
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|
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class Container |
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{ |
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/** |
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* @var array |
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*/ |
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public $registry = array(); |
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|
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/** |
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* Singleton instances |
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* |
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* @var array |
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*/ |
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public $singletons = array(); |
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|
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public function __construct($alias = null) |
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{ |
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if ($alias) { |
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AliasFacade::setVioconInstance($this); |
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class_alias('\\Viocon\\AliasFacade', $alias); |
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} |
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} |
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|
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/** |
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* Register an object with a key |
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* |
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* @param string $key |
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* @param mixed $object |
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* @param bool $singleton |
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* |
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* @return void |
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*/ |
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public function set($key, $object, $singleton = false) |
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{ |
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$this->registry[$key] = compact('object', 'singleton'); |
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} |
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|
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/** |
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* If we have a registry for the given key |
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* |
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* @param string $key |
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* |
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* @return bool |
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*/ |
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public function has($key) |
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{ |
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return array_key_exists($key, $this->registry); |
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} |
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|
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/** |
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* Register as singleton. |
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* |
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* @param string $key |
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* @param mixed $object |
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* |
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* @return void |
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*/ |
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public function singleton($key, $object) |
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{ |
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$this->set($key, $object, true); |
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} |
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|
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/** |
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* Register or replace an instance as a singleton. |
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* Useful for replacing with Mocked instance |
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* |
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* @param string $key |
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* @param mixed $instance |
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* |
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* @return void |
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*/ |
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public function setInstance($key, $instance) |
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{ |
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$this->singletons[$key] = $instance; |
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} |
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|
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/** |
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* Build from the given key. |
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* If there is a class registered with Container::set() then it's instance |
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* will be returned. If a closure is registered, a closure's return value |
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* will be returned. If nothing is registered then it will try to build an |
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* instance with new $key(...). |
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* |
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* $parameters will be passed to closure or class constructor. |
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* |
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* |
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* @param string $key |
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* @param array $parameters |
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* |
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* @return mixed |
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*/ |
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public function build($key, $parameters = array()) |
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{ |
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// If we have a singleton instance registered the just return it |
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if (array_key_exists($key, $this->singletons)) { |
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return $this->singletons[$key]; |
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} |
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|
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// If we don't have a registered object with the key then assume user |
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// is trying to build a class with the given key/name |
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|
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if (!array_key_exists($key, $this->registry)) { |
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$object = $key; |
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} else { |
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$object = $this->registry[$key]['object']; |
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} |
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|
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|
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$instance = $this->instanciate($object, $parameters); |
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|
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// If the key is registered as a singleton, we can save the instance as singleton |
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// for later use |
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if (isset($this->registry[$key]['singleton']) && $this->registry[$key]['singleton'] === true) { |
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$this->singletons[$key] = $instance; |
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} |
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|
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return $instance; |
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} |
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|
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/** |
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* Instantiate an instance of the given type. |
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* |
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* @param string $key |
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* @param array $parameters |
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* |
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* @throws \Exception |
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* @return mixed |
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*/ |
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protected function instanciate($key, $parameters = null) |
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{ |
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|
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if ($key instanceof \Closure) { |
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return call_user_func_array($key, $parameters); |
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} |
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|
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$reflection = new \ReflectionClass($key); |
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return $reflection->newInstanceArgs($parameters); |
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} |
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} |
