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<?php
/**
* @package Joomla.Legacy
* @subpackage Base
*
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Abstract observer class to implement the observer design pattern
*
* @since 11.1
* @deprecated 12.3 (Platform) & 4.0 (CMS)
* @codeCoverageIgnore
*/
abstract class JObserver extends JObject
{
/**
* Event object to observe.
*
* @var object
* @since 11.1
* @deprecated 12.3
*/
protected $_subject = null;
/**
* Constructor
*
* @param object &$subject The object to observe.
*
* @since 11.1
* @deprecated 12.3
*/
public function __construct(&$subject)
{
// Register the observer ($this) so we can be notified
$subject->attach($this);
// Set the subject to observe
$this->_subject = &$subject;
}
/**
* Method to update the state of observable objects
*
* @param array &$args An array of arguments to pass to the listener.
*
* @return mixed
*
* @since 11.1
* @deprecated 12.3
*/
public abstract function update(&$args);
}