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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Filter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Filter_Interface
  */
 // require_once 'Zend/Filter/Interface.php';
 
 /**
  * @category   Zend
  * @package    Zend_Filter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Filter_Callback implements Zend_Filter_Interface
 {
     /**
      * Callback in a call_user_func format
      *
      * @var string|array
      */
     protected $_callback = null;
 
     /**
      * Default options to set for the filter
      *
      * @var mixed
      */
     protected $_options = null;
 
     /**
      * Constructor
      *
      * @param string|array $callback Callback in a call_user_func format
      * @param mixed        $options  (Optional) Default options for this filter
      */
     public function __construct($options)
     {
         if ($options instanceof Zend_Config) {
             $options = $options->toArray();
         } else if (!is_array($options) || !array_key_exists('callback', $options)) {
             $options          = func_get_args();
             $temp['callback'] = array_shift($options);
             if (!empty($options)) {
                 $temp['options'] = array_shift($options);
             }
 
             $options = $temp;
         }
 
         if (!array_key_exists('callback', $options)) {
             // require_once 'Zend/Filter/Exception.php';
             throw new Zend_Filter_Exception('Missing callback to use');
         }
 
         $this->setCallback($options['callback']);
         if (array_key_exists('options', $options)) {
             $this->setOptions($options['options']);
         }
     }
 
     /**
      * Returns the set callback
      *
      * @return string|array Set callback
      */
     public function getCallback()
     {
         return $this->_callback;
     }
 
     /**
      * Sets a new callback for this filter
      *
      * @param unknown_type $callback
      * @return unknown
      */
     public function setCallback($callback, $options = null)
     {
         if (!is_callable($callback)) {
             // require_once 'Zend/Filter/Exception.php';
             throw new Zend_Filter_Exception('Callback can not be accessed');
         }
 
         $this->_callback = $callback;
         $this->setOptions($options);
         return $this;
     }
 
     /**
      * Returns the set default options
      *
      * @return mixed
      */
     public function getOptions()
     {
         return $this->_options;
     }
 
     /**
      * Sets new default options to the callback filter
      *
      * @param mixed $options Default options to set
      * @return Zend_Filter_Callback
      */
     public function setOptions($options)
     {
         $this->_options = $options;
         return $this;
     }
 
     /**
      * Calls the filter per callback
      *
      * @param mixed $value Options for the set callback
      * @return mixed       Result from the filter which was callbacked
      */
     public function filter($value)
     {
         $options = array();
 
         if ($this->_options !== null) {
             if (!is_array($this->_options)) {
                 $options = array($this->_options);
             } else {
                 $options = $this->_options;
             }
         }
 
         array_unshift($options, $value);
 
         return call_user_func_array($this->_callback, $options);
     }
 }