<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\EventDispatcher;
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/**
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* A read-only proxy for an event dispatcher.
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*
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* @author Bernhard Schussek <bschussek@gmail.com>
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*/
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class ImmutableEventDispatcher implements EventDispatcherInterface
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{
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private $dispatcher;
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public function __construct(EventDispatcherInterface $dispatcher)
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{
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$this->dispatcher = LegacyEventDispatcherProxy::decorate($dispatcher);
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}
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/**
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* {@inheritdoc}
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*
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* @param string|null $eventName
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*/
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public function dispatch($event/*, string $eventName = null*/)
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{
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$eventName = 1 < \func_num_args() ? func_get_arg(1) : null;
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if (is_scalar($event)) {
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// deprecated
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$swap = $event;
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$event = $eventName ?? new Event();
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$eventName = $swap;
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}
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return $this->dispatcher->dispatch($event, $eventName);
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}
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/**
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* {@inheritdoc}
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*/
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public function addListener($eventName, $listener, $priority = 0)
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{
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throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
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}
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/**
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* {@inheritdoc}
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*/
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public function addSubscriber(EventSubscriberInterface $subscriber)
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{
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throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
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}
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/**
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* {@inheritdoc}
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*/
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public function removeListener($eventName, $listener)
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{
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throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
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}
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/**
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* {@inheritdoc}
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*/
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public function removeSubscriber(EventSubscriberInterface $subscriber)
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{
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throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
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}
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/**
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* {@inheritdoc}
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*/
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public function getListeners($eventName = null)
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{
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return $this->dispatcher->getListeners($eventName);
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}
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/**
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* {@inheritdoc}
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*/
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public function getListenerPriority($eventName, $listener)
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{
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return $this->dispatcher->getListenerPriority($eventName, $listener);
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}
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/**
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* {@inheritdoc}
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*/
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public function hasListeners($eventName = null)
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{
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return $this->dispatcher->hasListeners($eventName);
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}
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}
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