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<?php
/**
* @package Joomla.Platform
* @subpackage Observer
*
* @copyright Copyright (C) 2005 - 2020 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Observer updater pattern implementation for Joomla
*
* @since 3.1.2
*/
interface JObserverUpdaterInterface
{
/**
* Constructor
*
* @param JObservableInterface $observable The observable subject object
*
* @since 3.1.2
*/
public function __construct(JObservableInterface $observable);
/**
* Adds an observer to the JObservableInterface instance updated by this
* This method can be called from JObservableInterface::attachObserver
*
* @param JObserverInterface $observer The observer object
*
* @return void
*
* @since 3.1.2
*/
public function attachObserver(JObserverInterface $observer);
/**
* Call all observers for $event with $params
*
* @param string $event Event name (function name in observer)
* @param array $params Params of event (params in observer function)
*
* @return void
*
* @since 3.1.2
*/
public function update($event, $params);
/**
* Enable/Disable calling of observers (this is useful when calling parent:: function
*
* @param boolean $enabled Enable (true) or Disable (false) the observer events
*
* @return boolean Returns old state
*
* @since 3.1.2
*/
public function doCallObservers($enabled);
}