lib/zend/Zend/Exception.php

   1 <?php
   2 /**
   3  * Zend Framework
   4  *
   5  * LICENSE
   6  *
   7  * This source file is subject to the new BSD license that is bundled
   8  * with this package in the file LICENSE.txt.
   9  * It is also available through the world-wide-web at this URL:
  10  * http://framework.zend.com/license/new-bsd
  11  * If you did not receive a copy of the license and are unable to
  12  * obtain it through the world-wide-web, please send an email
  13  * to license@zend.com so we can send you a copy immediately.
  14  *
  15  * @category   Zend
  16  * @package    Zend
  17  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  18  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  19  */
  20
  21 /**
  22 * @category   Zend
  23 * @package    Zend
  24 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  25 * @license    http://framework.zend.com/license/new-bsd     New BSD License
  26 */
  27 class Zend_Exception extends Exception
  28 {
  29     /**
  30      * @var null|Exception
  31      */
  32     private $_previous = null;
  33
  34     /**
  35      * Construct the exception
  36      *
  37      * @param  string $msg
  38      * @param  int $code
  39      * @param  Exception $previous
  40      * @return void
  41      */
  42     public function __construct($msg = '', $code = 0, Exception $previous = null)
  43     {
  44         if (version_compare(PHP_VERSION, '5.3.0', '<')) {
  45             parent::__construct($msg, (int) $code);
  46             $this->_previous = $previous;
  47         } else {
  48             parent::__construct($msg, (int) $code, $previous);
  49         }
  50     }
  51
  52     /**
  53      * Overloading
  54      *
  55      * For PHP < 5.3.0, provides access to the getPrevious() method.
  56      *
  57      * @param  string $method
  58      * @param  array $args
  59      * @return mixed
  60      */
  61     public function __call($method, array $args)
  62     {
  63         if ('getprevious' == strtolower($method)) {
  64             return $this->_getPrevious();
  65         }
  66         return null;
  67     }
  68
  69     /**
  70      * String representation of the exception
  71      *
  72      * @return string
  73      */
  74     public function __toString()
  75     {
  76         if (version_compare(PHP_VERSION, '5.3.0', '<')) {
  77             if (null !== ($e = $this->getPrevious())) {
  78                 return $e->__toString()
  79                        . "\n\nNext "
  80                        . parent::__toString();
  81             }
  82         }
  83         return parent::__toString();
  84     }
  85
  86     /**
  87      * Returns previous Exception
  88      *
  89      * @return Exception|null
  90      */
  91     protected function _getPrevious()
  92     {
  93         return $this->_previous;
  94     }
  95 }