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<?php |
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/* |
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* Copyright 2016 Johannes M. Schmitt <[email protected]> |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace JMS\Serializer\EventDispatcher; |
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use JMS\Serializer\Exception\InvalidArgumentException; |
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/** |
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* Light-weight event dispatcher. |
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* |
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* This implementation focuses primarily on performance, and dispatching |
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* events for certain classes. It is not a general purpose event dispatcher. |
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* |
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* @author Johannes M. Schmitt <[email protected]> |
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*/ |
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class EventDispatcher implements EventDispatcherInterface |
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{ |
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private $listeners = array(); |
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private $classListeners = array(); |
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public static function getDefaultMethodName($eventName) |
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{ |
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return 'on' . str_replace(array('_', '.'), '', $eventName); |
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} |
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/** |
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* Sets the listeners. |
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* |
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* @param array $listeners |
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*/ |
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public function setListeners(array $listeners) |
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{ |
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$this->listeners = $listeners; |
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$this->classListeners = array(); |
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} |
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public function addListener($eventName, $callable, $class = null, $format = null) |
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{ |
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$this->listeners[$eventName][] = array($callable, null === $class ? null : $class, $format); |
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unset($this->classListeners[$eventName]); |
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} |
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public function addSubscriber(EventSubscriberInterface $subscriber) |
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{ |
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foreach ($subscriber->getSubscribedEvents() as $eventData) { |
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if (!isset($eventData['event'])) { |
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throw new InvalidArgumentException(sprintf('Each event must have a "event" key.')); |
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} |
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$method = isset($eventData['method']) ? $eventData['method'] : self::getDefaultMethodName($eventData['event']); |
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$class = isset($eventData['class']) ? $eventData['class'] : null; |
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$format = isset($eventData['format']) ? $eventData['format'] : null; |
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$this->listeners[$eventData['event']][] = array(array($subscriber, $method), $class, $format); |
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unset($this->classListeners[$eventData['event']]); |
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} |
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} |
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public function hasListeners($eventName, $class, $format) |
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{ |
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if (!isset($this->listeners[$eventName])) { |
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return false; |
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} |
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if (!isset($this->classListeners[$eventName][$class][$format])) { |
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$this->classListeners[$eventName][$class][$format] = $this->initializeListeners($eventName, $class, $format); |
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} |
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return !!$this->classListeners[$eventName][$class][$format]; |
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} |
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public function dispatch($eventName, $class, $format, Event $event) |
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{ |
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if (!isset($this->listeners[$eventName])) { |
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return; |
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} |
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if (!isset($this->classListeners[$eventName][$class][$format])) { |
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$this->classListeners[$eventName][$class][$format] = $this->initializeListeners($eventName, $class, $format); |
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} |
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foreach ($this->classListeners[$eventName][$class][$format] as $listener) { |
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if ($event->isPropagationStopped()) { |
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break; |
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} |
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\call_user_func($listener, $event, $eventName, $class, $format, $this); |
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} |
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} |
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/** |
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* @param string $eventName |
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* @param string $loweredClass |
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* @param string $format |
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* |
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* @return array An array of listeners |
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*/ |
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protected function initializeListeners($eventName, $loweredClass, $format) |
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{ |
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$listeners = array(); |
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foreach ($this->listeners[$eventName] as $listener) { |
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if (null !== $listener[1] && $loweredClass !== $listener[1]) { |
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continue; |
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} |
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if (null !== $listener[2] && $format !== $listener[2]) { |
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continue; |
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} |
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$listeners[] = $listener[0]; |
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} |
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return $listeners; |
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} |
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} |
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schmittjoh /
serializer
