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<?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\Component\EventDispatcher;
/**
* A read-only proxy for an event dispatcher.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class ImmutableEventDispatcher implements EventDispatcherInterface
{
private $dispatcher;
public function __construct(EventDispatcherInterface $dispatcher)
{
$this->dispatcher = LegacyEventDispatcherProxy::decorate($dispatcher);
}
/**
* {@inheritdoc}
*
* @param string|null $eventName
*/
public function dispatch($event/*, string $eventName = null*/)
{
$eventName = 1 < \func_num_args() ? \func_get_arg(1) : null;
if (\is_scalar($event)) {
// deprecated
$swap = $event;
$event = $eventName ?? new Event();
$eventName = $swap;
}
return $this->dispatcher->dispatch($event, $eventName);
}
/**
* {@inheritdoc}
*/
public function addListener($eventName, $listener, $priority = 0)
{
throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
}
/**
* {@inheritdoc}
*/
public function addSubscriber(EventSubscriberInterface $subscriber)
{
throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
}
/**
* {@inheritdoc}
*/
public function removeListener($eventName, $listener)
{
throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
}
/**
* {@inheritdoc}
*/
public function removeSubscriber(EventSubscriberInterface $subscriber)
{
throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
}
/**
* {@inheritdoc}
*/
public function getListeners($eventName = null)
{
return $this->dispatcher->getListeners($eventName);
}
/**
* {@inheritdoc}
*/
public function getListenerPriority($eventName, $listener)
{
return $this->dispatcher->getListenerPriority($eventName, $listener);
}
/**
* {@inheritdoc}
*/
public function hasListeners($eventName = null)
{
return $this->dispatcher->hasListeners($eventName);
}
}
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