123 lines
3.9 KiB
PHP
123 lines
3.9 KiB
PHP
<?php
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/*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\ORM\Event;
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use Doctrine\Common\EventSubscriber;
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use LogicException;
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/**
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* Delegate events only for certain entities they are registered for.
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*
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* @link www.doctrine-project.org
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* @author Benjamin Eberlei <kontakt@beberlei.de>
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @since 2.2
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*/
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class EntityEventDelegator implements EventSubscriber
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{
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/**
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* Keeps track of all the event listeners.
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*
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* @var array
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*/
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private $listeners = array();
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/**
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* If frozen no new event listeners can be added.
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*
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* @var bool
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*/
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private $frozen = false;
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/**
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* Adds an event listener that listens on the specified events.
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*
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* @param string|array $events The event(s) to listen on.
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* @param string|array $entities The entities to trigger this listener for
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* @param object $listener The listener object.
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*/
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public function addEventListener($events, $entities, $listener)
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{
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if ($this->frozen) {
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throw new LogicException(
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"Cannot add event listeners after EntityEventDelegator::getSubscribedEvents() " .
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"is called once. This happens when you register the delegator with the event manager."
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);
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}
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// Picks the hash code related to that listener
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$hash = spl_object_hash($listener);
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$entities = array_flip((array) $entities);
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foreach ((array) $events as $event) {
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// Overrides listener if a previous one was associated already
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// Prevents duplicate listeners on same event (same instance only)
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$this->listeners[$event][$hash] = array(
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'listener' => $listener,
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'entities' => $entities
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);
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}
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}
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/**
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* Adds an EventSubscriber. The subscriber is asked for all the events he is
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* interested in and added as a listener for these events.
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*
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* @param Doctrine\Common\EventSubscriber $subscriber The subscriber.
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* @param array $entities
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*/
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public function addEventSubscriber(EventSubscriber $subscriber, $entities)
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{
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$this->addEventListener($subscriber->getSubscribedEvents(), $entities, $subscriber);
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}
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/**
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* Returns an array of events this subscriber wants to listen to.
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*
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* @return array
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*/
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public function getSubscribedEvents()
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{
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$this->frozen = true;
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return array_keys($this->listeners);
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}
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/**
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* Delegate the event to an appropriate listener
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*
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* @param string $eventName
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* @param array $args
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* @return void
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*/
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public function __call($eventName, $args)
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{
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$event = $args[0];
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foreach ($this->listeners[$eventName] AS $listenerData) {
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$class = get_class($event->getEntity());
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if ( ! isset($listenerData['entities'][$class])) continue;
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$listenerData['listener']->$eventName($event);
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}
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}
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}
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