Observer.class.php:
<?php
/**
* XOAD Observer file.
*
* <p>This file defines the {@link XOAD_Observer} Class.</p>
* <p>Example:</p>
* <code>
* <?php
*
* require_once('xoad.php');
*
* class CallbackObserver extends XOAD_Observer
* {
* function updateObserver($event, $arg)
* {
* print $event . ' called.';
* }
* }
*
* XOAD_Server::addObserver(new CallbackObserver());
*
* ...
*
* ?>
* </code>
*
* @author Stanimir Angeloff
*
* @package XOAD
*
* @version 0.5.0.0
*
*/
/**
* XOAD Observer Class.
*
* <p>To observe XOAD events you must define your own
* classes that extend the {@link XOAD_Observer} class.</p>
* <p>See {@link XOAD_Observer::updateObserver} for
* more information.</p>
* <p>Example:</p>
* <code>
* <?php
*
* require_once('xoad.php');
*
* class CallbackObserver extends XOAD_Observer
* {
* function updateObserver($event, $arg)
* {
* print $event . ' called.';
* }
* }
*
* XOAD_Server::addObserver(new CallbackObserver());
*
* ...
*
* ?>
* </code>
*
* @author Stanimir Angeloff
*
* @package XOAD
*
* @version 0.5.0.0
*
*/
class XOAD_Observer
{
/**
* This method is called when {@link XOAD_Observable::notifyObservers}
* is called.
*
* <p>You should override this method to accept two parameters - the
* event name and the event argument.</p>
* <p>If {@link XOAD_Observable::notifyObservers} is called without
* parameters the event name is 'default'.</p>
* <p>You should also always return a boolean value that indicates
* the result of the event.</p>
*
* @access public
*
* @return bool Always true.
*
*/
function updateObserver()
{
return true;
}
}
?>
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