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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_Pdf
  * @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    $Id$
  */
 
 
 /** Zend_Pdf_Filter_Compression */
 // require_once 'Zend/Pdf/Filter/Compression.php';
 
 /**
  * LZW stream filter
  *
  * @package    Zend_Pdf
  * @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_Pdf_Filter_Compression_Lzw extends Zend_Pdf_Filter_Compression
 {
     /**
      * Get EarlyChange decode param value
      *
      * @param array $params
      * @return integer
      * @throws Zend_Pdf_Exception
      */
     private static function _getEarlyChangeValue($params)
     {
         if (isset($params['EarlyChange'])) {
             $earlyChange = $params['EarlyChange'];
 
             if ($earlyChange != 0  &&  $earlyChange != 1) {
                 // require_once 'Zend/Pdf/Exception.php';
                 throw new Zend_Pdf_Exception('Invalid value of \'EarlyChange\' decode param - ' . $earlyChange . '.' );
             }
             return $earlyChange;
         } else {
             return 1;
         }
     }
 
 
     /**
      * Encode data
      *
      * @param string $data
      * @param array $params
      * @return string
      * @throws Zend_Pdf_Exception
      */
     public static function encode($data, $params = null)
     {
         if ($params != null) {
             $data = self::_applyEncodeParams($data, $params);
         }
 
         // require_once 'Zend/Pdf/Exception.php';
         throw new Zend_Pdf_Exception('Not implemented yet');
     }
 
     /**
      * Decode data
      *
      * @param string $data
      * @param array $params
      * @return string
      * @throws Zend_Pdf_Exception
      */
     public static function decode($data, $params = null)
     {
         // require_once 'Zend/Pdf/Exception.php';
         throw new Zend_Pdf_Exception('Not implemented yet');
 
         if ($params !== null) {
             return self::_applyDecodeParams($data, $params);
         } else {
             return $data;
         }
     }
 }