vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/ImmutableEventDispatcher.php

   1 <?php
   2
   3 /*
   4  * This file is part of the Symfony package.
   5  *
   6  * (c) Fabien Potencier <fabien@symfony.com>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Symfony\Component\EventDispatcher;
  13
  14 /**
  15  * A read-only proxy for an event dispatcher.
  16  *
  17  * @author Bernhard Schussek <bschussek@gmail.com>
  18  */
  19 class ImmutableEventDispatcher implements EventDispatcherInterface
  20 {
  21     /**
  22      * The proxied dispatcher.
  23      * @var EventDispatcherInterface
  24      */
  25     private $dispatcher;
  26
  27     /**
  28      * Creates an unmodifiable proxy for an event dispatcher.
  29      *
  30      * @param EventDispatcherInterface $dispatcher The proxied event dispatcher.
  31      */
  32     public function __construct(EventDispatcherInterface $dispatcher)
  33     {
  34         $this->dispatcher = $dispatcher;
  35     }
  36
  37     /**
  38      * {@inheritdoc}
  39      */
  40     public function dispatch($eventName, Event $event = null)
  41     {
  42         return $this->dispatcher->dispatch($eventName, $event);
  43     }
  44
  45     /**
  46      * {@inheritdoc}
  47      */
  48     public function addListener($eventName, $listener, $priority = 0)
  49     {
  50         throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
  51     }
  52
  53     /**
  54      * {@inheritdoc}
  55      */
  56     public function addSubscriber(EventSubscriberInterface $subscriber)
  57     {
  58         throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
  59     }
  60
  61     /**
  62      * {@inheritdoc}
  63      */
  64     public function removeListener($eventName, $listener)
  65     {
  66         throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
  67     }
  68
  69     /**
  70      * {@inheritdoc}
  71      */
  72     public function removeSubscriber(EventSubscriberInterface $subscriber)
  73     {
  74         throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
  75     }
  76
  77     /**
  78      * {@inheritdoc}
  79      */
  80     public function getListeners($eventName = null)
  81     {
  82         return $this->dispatcher->getListeners($eventName);
  83     }
  84
  85     /**
  86      * {@inheritdoc}
  87      */
  88     public function hasListeners($eventName = null)
  89     {
  90         return $this->dispatcher->hasListeners($eventName);
  91     }
  92 }