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<?php
/**
* @version $Id: event.php 14401 2010-01-26 14:10:00Z louis $
* @package Joomla.Framework
* @subpackage Event
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();
jimport( 'joomla.base.observer' );
/**
* JEvent Class
*
* @abstract
* @package Joomla.Framework
* @subpackage Event
* @since 1.5
*/
class JEvent extends JObserver
{
/**
* Constructor
*
* For php4 compatability we must not use the __constructor as a constructor for plugins
* because func_get_args ( void ) returns a copy of all passed arguments NOT references.
* This causes problems with cross-referencing necessary for the observer design pattern.
*
* @param object $subject The object to observe
* @since 1.5
*/
function JEvent(& $subject) {
parent::__construct($subject);
}
/**
* Method to trigger events
*
* @access public
* @param array Arguments
* @return mixed Routine return value
* @since 1.5
*/
function update(& $args)
{
/*
* First lets get the event from the argument array. Next we will unset the
* event argument as it has no bearing on the method to handle the event.
*/
$event = $args['event'];
unset($args['event']);
/*
* If the method to handle an event exists, call it and return its return
* value. If it does not exist, return null.
*/
if (method_exists($this, $event)) {
return call_user_func_array ( array($this, $event), $args );
} else {
return null;
}
}
}