<?php /** * Zend Framework (http://framework.zend.com/) * * @link http://github.com/zendframework/zf2 for the canonical source repository * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ namespace Zend\EventManager; use Traversable; /** * A trait for objects that provide events */ trait ProvidesEvents { /** * @var EventManagerInterface */ protected $events; /** * Set the event manager instance used by this context * * @param EventManagerInterface $events * @return mixed */ public function setEventManager(EventManagerInterface $events) { $identifiers = array(__CLASS__, get_class($this)); if (isset($this->eventIdentifier)) { if ((is_string($this->eventIdentifier)) || (is_array($this->eventIdentifier)) || ($this->eventIdentifier instanceof Traversable) ) { $identifiers = array_unique(array_merge($identifiers, (array) $this->eventIdentifier)); } elseif (is_object($this->eventIdentifier)) { $identifiers[] = $this->eventIdentifier; } // silently ignore invalid eventIdentifier types } $events->setIdentifiers($identifiers); $this->events = $events; return $this; } /** * Retrieve the event manager * * Lazy-loads an EventManager instance if none registered. * * @return EventManagerInterface */ public function getEventManager() { if (!$this->events instanceof EventManagerInterface) { $this->setEventManager(new EventManager()); } return $this->events; } }