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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_Log
  * @subpackage Writer
  * @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_Log_Filter_Priority */
 // require_once 'Zend/Log/Filter/Priority.php';
 
 /**
  * @category   Zend
  * @package    Zend_Log
  * @subpackage Writer
  * @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    $Id$
  */
 abstract class Zend_Log_Writer_Abstract implements Zend_Log_FactoryInterface
 {
     /**
      * @var array of Zend_Log_Filter_Interface
      */
     protected $_filters = array();
 
     /**
      * Formats the log message before writing.
      *
      * @var Zend_Log_Formatter_Interface
      */
     protected $_formatter;
 
     /**
      * Add a filter specific to this writer.
      *
      * @param  Zend_Log_Filter_Interface|int $filter Filter class or filter
      *                                               priority
      * @return Zend_Log_Writer_Abstract
      * @throws Zend_Log_Exception
      */
     public function addFilter($filter)
     {
         if (is_int($filter)) {
             $filter = new Zend_Log_Filter_Priority($filter);
         }
 
         if (!$filter instanceof Zend_Log_Filter_Interface) {
             /** @see Zend_Log_Exception */
             // require_once 'Zend/Log/Exception.php';
             throw new Zend_Log_Exception('Invalid filter provided');
         }
 
         $this->_filters[] = $filter;
         return $this;
     }
 
     /**
      * Log a message to this writer.
      *
      * @param  array $event log data event
      * @return void
      */
     public function write($event)
     {
         /** @var Zend_Log_Filter_Interface $filter */
         foreach ($this->_filters as $filter) {
             if (!$filter->accept($event)) {
                 return;
             }
         }
 
         // exception occurs on error
         $this->_write($event);
     }
 
     /**
      * Set a new formatter for this writer
      *
      * @param  Zend_Log_Formatter_Interface $formatter
      * @return Zend_Log_Writer_Abstract
      */
     public function setFormatter(Zend_Log_Formatter_Interface $formatter)
     {
         $this->_formatter = $formatter;
         return $this;
     }
 
     /**
      * Perform shutdown activites such as closing open resources
      *
      * @return void
      */
     public function shutdown()
     {}
 
     /**
      * Write a message to the log.
      *
      * @param  array $event log data event
      * @return void
      */
     abstract protected function _write($event);
 
     /**
      * Validate and optionally convert the config to array
      *
      * @param  array|Zend_Config $config Zend_Config or Array
      * @return array
      * @throws Zend_Log_Exception
      */
     static protected function _parseConfig($config)
     {
         if ($config instanceof Zend_Config) {
             $config = $config->toArray();
         }
 
         if (!is_array($config)) {
             // require_once 'Zend/Log/Exception.php';
             throw new Zend_Log_Exception(
                 'Configuration must be an array or instance of Zend_Config'
             );
         }
 
         return $config;
     }
 }