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<?php
/**
* @version $Id$
* @package Koowa_Exception
* @copyright Copyright (C) 2007 - 2012 Johan Janssens. All rights reserved.
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
* @link http://www.nooku.org
*/
/**
* Exception Class
*
* KException is the base class for all koowa related exceptions and
* provides an additional method for printing up a detailed view of an
* exception.
*
* KException has support for nested exceptions which is a feature that
* was only added in PHP 5.3
*
* @author Johan Janssens <johan@nooku.org>
* @package Koowa_Exception
*/
class KException extends Exception implements KExceptionInterface
{
/**
* Previous exception if nested exception
*
* @var Exception
*/
private $_previous = null;
/**
* Constructor
*
* @param string The exception message
* @param integer The exception code
* @param object The previous exception
*/
public function __construct($message = null, $code = KHttpResponse::INTERNAL_SERVER_ERROR, Exception $previous = null)
{
if (!$message) {
throw new $this('Unknown '. get_class($this));
}
if (version_compare(PHP_VERSION, '5.3.0', '<')) {
parent::__construct($message, (int) $code);
$this->_previous = $previous;
} else {
parent::__construct($message, (int) $code, $previous);
}
}
/**
* Overloading
*
* For PHP < 5.3.0, provides access to the getPrevious() method.
*
* @param string The function name
* @param array The function arguments
* @return mixed
*/
public function __call($method, $args)
{
if ('getprevious' == strtolower($method)) {
return $this->_getPrevious();
}
return null;
}
/**
* Get the previous Exception
*
* @return Exception
*/
protected function _getPrevious()
{
return $this->_previous;
}
/**
* Format the exception for display
*
* @return string
*/
public function __toString()
{
return "Exception '".get_class($this) ."' with message '".$this->getMessage()."' in ".$this->getFile().":".$this->getLine();
}
}
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