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<?php
declare(strict_types=1);
namespace Jasny\EventDispatcher;
use Psr\EventDispatcher\EventDispatcherInterface;
use Psr\EventDispatcher\ListenerProviderInterface;
use Psr\EventDispatcher\StoppableEventInterface;
/**
* Event dispatcher.
* @immutable
*/
class EventDispatcher implements EventDispatcherInterface
{
* @var ListenerProviderInterface
protected $listenerProvider;
* EventDispatcher constructor.
*
* @param ListenerProviderInterface $listenerProvider
public function __construct(ListenerProviderInterface $listenerProvider)
$this->listenerProvider = $listenerProvider;
}
* Get the listener provider used by this dispatcher
* @return ListenerProviderInterface
public function getListenerProvider(): ListenerProviderInterface
return $this->listenerProvider;
* Get a dispatcher with a different/modified listener provider.
* @return static
public function withListenerProvider(ListenerProviderInterface $listenerProvider): self
if ($this->listenerProvider === $listenerProvider) {
return $this;
$clone = clone $this;
$clone->listenerProvider = $listenerProvider;
return $clone;
* Dispatch an event.
* @param object $event
* @return object The event that was passed, now modified by the listeners.
public function dispatch(object $event): object
$listeners = $this->listenerProvider->getListenersForEvent($event);
foreach ($listeners as $listener) {
if ($event instanceof StoppableEventInterface && $event->isPropagationStopped()) {
break;
$listener($event);
return $event;