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Direktori : /opt/alt/php55/usr/share/pear/Symfony/Bridge/Doctrine/ |
Current File : //opt/alt/php55/usr/share/pear/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php |
<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Bridge\Doctrine; use Doctrine\Common\EventArgs; use Doctrine\Common\EventManager; use Symfony\Component\DependencyInjection\ContainerInterface; /** * Allows lazy loading of listener services. * * @author Johannes M. Schmitt <schmittjoh@gmail.com> */ class ContainerAwareEventManager extends EventManager { /** * Map of registered listeners. * <event> => <listeners> * * @var array */ private $listeners = array(); private $initialized = array(); private $container; public function __construct(ContainerInterface $container) { $this->container = $container; } /** * Dispatches an event to all registered listeners. * * @param string $eventName The name of the event to dispatch. The name of the event is * the name of the method that is invoked on listeners. * @param EventArgs $eventArgs The event arguments to pass to the event handlers/listeners. * If not supplied, the single empty EventArgs instance is used. * @return boolean */ public function dispatchEvent($eventName, EventArgs $eventArgs = null) { if (isset($this->listeners[$eventName])) { $eventArgs = $eventArgs === null ? EventArgs::getEmptyInstance() : $eventArgs; $initialized = isset($this->initialized[$eventName]); foreach ($this->listeners[$eventName] as $hash => $listener) { if (!$initialized && is_string($listener)) { $this->listeners[$eventName][$hash] = $listener = $this->container->get($listener); } $listener->$eventName($eventArgs); } $this->initialized[$eventName] = true; } } /** * Gets the listeners of a specific event or all listeners. * * @param string $event The name of the event. * * @return array The event listeners for the specified event, or all event listeners. */ public function getListeners($event = null) { return $event ? $this->listeners[$event] : $this->listeners; } /** * Checks whether an event has any registered listeners. * * @param string $event * * @return boolean TRUE if the specified event has any listeners, FALSE otherwise. */ public function hasListeners($event) { return isset($this->listeners[$event]) && $this->listeners[$event]; } /** * Adds an event listener that listens on the specified events. * * @param string|array $events The event(s) to listen on. * @param object|string $listener The listener object. * * @throws \RuntimeException */ public function addEventListener($events, $listener) { if (is_string($listener)) { if ($this->initialized) { throw new \RuntimeException('Adding lazy-loading listeners after construction is not supported.'); } $hash = '_service_'.$listener; } else { // Picks the hash code related to that listener $hash = spl_object_hash($listener); } foreach ((array) $events as $event) { // Overrides listener if a previous one was associated already // Prevents duplicate listeners on same event (same instance only) $this->listeners[$event][$hash] = $listener; } } /** * Removes an event listener from the specified events. * * @param string|array $events * @param object|string $listener */ public function removeEventListener($events, $listener) { if (is_string($listener)) { $hash = '_service_'.$listener; } else { // Picks the hash code related to that listener $hash = spl_object_hash($listener); } foreach ((array) $events as $event) { // Check if actually have this listener associated if (isset($this->listeners[$event][$hash])) { unset($this->listeners[$event][$hash]); } } } }