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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 */
+
+/**
+ * @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 */
+ 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)) {
+ throw new Zend_Log_Exception(
+ 'Configuration must be an array or instance of Zend_Config'
+ );
+ }
+
+ return $config;
+ }
+}