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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_Ldap
  * @subpackage 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_Ldap_Filter_Abstract
  */
 // require_once 'Zend/Ldap/Filter/Abstract.php';
 
 /**
  * Zend_Ldap_Filter_Not provides a negation filter.
  *
  * @category   Zend
  * @package    Zend_Ldap
  * @subpackage 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_Ldap_Filter_Not extends Zend_Ldap_Filter_Abstract
 {
     /**
      * The underlying filter.
      *
      * @var Zend_Ldap_Filter_Abstract
      */
     private $_filter;
 
     /**
      * Creates a Zend_Ldap_Filter_Not.
      *
      * @param Zend_Ldap_Filter_Abstract $filter
      */
     public function __construct(Zend_Ldap_Filter_Abstract $filter)
     {
         $this->_filter = $filter;
     }
 
     /**
      * Negates the filter.
      *
      * @return Zend_Ldap_Filter_Abstract
      */
     public function negate()
     {
         return $this->_filter;
     }
 
     /**
      * Returns a string representation of the filter.
      *
      * @return string
      */
     public function toString()
     {
         return '(!' . $this->_filter->toString() . ')';
     }
 }