142 lines
2.9 KiB
PHP
142 lines
2.9 KiB
PHP
<?php namespace Laravel;
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class IoC {
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/**
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* The active container instance.
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*
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* @var Container
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*/
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public static $container;
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/**
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* Get the active container instance.
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*
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* @return Container
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*/
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public static function container()
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{
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return static::$container;
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}
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/**
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* Magic Method for calling methods on the active container instance.
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*/
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public static function __callStatic($method, $parameters)
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{
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return call_user_func_array(array(static::$container, $method), $parameters);
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}
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}
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class Container {
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/**
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* The resolved 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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* The registered dependencies.
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*
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* @var array
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*/
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protected $registry = array();
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/**
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* Create a new IoC container instance.
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*
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* @param array $registry
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* @return void
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*/
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public function __construct($registry = array())
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{
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$this->registry = $registry;
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}
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/**
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* Register an object and its resolver.
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*
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* @param string $name
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* @param Closure $resolver
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* @return void
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*/
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public function register($name, $resolver, $singleton = false)
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{
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$this->registry[$name] = array('resolver' => $resolver, 'singleton' => $singleton);
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}
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/**
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* Determine if an object has been registered in the container.
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*
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* @param string $name
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* @return bool
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*/
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public function registered($name)
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{
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return array_key_exists($name, $this->registry);
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}
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/**
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* Register an object as a singleton.
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*
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* Singletons will only be instantiated the first time they are resolved.
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* On subsequent requests for the object, the original instance will be returned.
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*
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* @param string $name
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* @param Closure $resolver
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* @return void
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*/
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public function singleton($name, $resolver)
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{
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$this->register($name, $resolver, true);
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}
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/**
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* Register an instance as a singleton.
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*
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* This method allows you to register an already existing object instance
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* with the container to be managed as a singleton instance.
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*
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* @param string $name
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* @param mixed $instance
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* @return void
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*/
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public function instance($name, $instance)
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{
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$this->singletons[$name] = $instance;
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}
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/**
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* Resolve an object.
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*
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* @param string $name
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* @return mixed
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*/
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public function resolve($name)
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{
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if (array_key_exists($name, $this->singletons)) return $this->singletons[$name];
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if ( ! $this->registered($name))
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{
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throw new \Exception("Error resolving [$name]. No resolver has been registered in the container.");
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}
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$object = call_user_func($this->registry[$name]['resolver'], $this);
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return (isset($this->registry[$name]['singleton'])) ? $this->singletons[$name] = $object : $object;
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}
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/**
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* Magic Method for resolving classes out of the IoC container.
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*/
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public function __get($key)
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{
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if ($this->registered($key)) return $this->resolve($key);
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throw new \Exception("Attempting to resolve undefined class [$key].");
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}
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} |