<?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

 */

/**

 * Returns the Mapped Diagnostic Context value corresponding to the given key.

 *

 * Options:

 *  [0] the MDC key

 *

 * @package log4php

 * @subpackage pattern

 * @version $Revision: 1326626 $

 * @since 2.3

 */

class LoggerPatternConverterMDC extends LoggerPatternConverter {

    private $key;

    public function activateOptions() {

        if (isset($this->option) && $this->option !== '') {

            $this->key = $this->option;

        }

    }

    public function convert(LoggerLoggingEvent $event) {

        if (isset($this->key)) {

            return $event->getMDC($this->key);

        } else {

            $buff = array();

            $map = $event->getMDCMap();

            foreach ($map as $key => $value) {

                $buff [] = "$key=$value";

            }

            return implode(', ', $buff);

        }

    }

}