<?php
  /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   *	   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * 
   * @package log4php
   */
  
  /**
   * Converts PHP configuration files to a PHP array.
   * 
   * The file should only hold the PHP config array preceded by "return".
   * 
   * Example PHP config file:
   * <code>
   * <?php
   * return array(
   *   'rootLogger' => array(
   *     'level' => 'info',
   *     'appenders' => array('default')
   *   ),
   *   'appenders' => array(
   *     'default' => array(
   *       'class' => 'LoggerAppenderEcho',
   *       'layout' => array(
   *       	'class' => 'LoggerLayoutSimple'
   *        )
   *     )
   *   )
   * )
   * ?>
   * </code>
   * 
   * @package log4php
   * @subpackage configurators
   * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
   * @version $Revision: 1343601 $
   * @since 2.2
   */
  class LoggerConfigurationAdapterPHP implements LoggerConfigurationAdapter
  {
  	public function convert($url) {
  		if (!file_exists($url)) {
  			throw new LoggerException("File [$url] does not exist.");
  		}
  		
  		// Load the config file
  		$data = @file_get_contents($url);
  		if ($data === false) {
  			$error = error_get_last();
  			throw new LoggerException("Error loading config file: {$error['message']}");
  		}
  		
  		$config = @eval('?>' . $data);
  		
  		if ($config === false) {
  			$error = error_get_last();
  			throw new LoggerException("Error parsing configuration: " . $error['message']);
  		}
  		
  		if (empty($config)) {
  			throw new LoggerException("Invalid configuration: empty configuration array.");
  		}
  		
  		if (!is_array($config)) {
  			throw new LoggerException("Invalid configuration: not an array.");
  		}
  		
  		return $config;
  	}
  }