    001/**
    002 * Copyright (c) 2004-2011 QOS.ch
    003 * All rights reserved.
    004 *
    005 * Permission is hereby granted, free  of charge, to any person obtaining
    006 * a  copy  of this  software  and  associated  documentation files  (the
    007 * "Software"), to  deal in  the Software without  restriction, including
    008 * without limitation  the rights to  use, copy, modify,  merge, publish,
    009 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
    010 * permit persons to whom the Software  is furnished to do so, subject to
    011 * the following conditions:
    012 *
    013 * The  above  copyright  notice  and  this permission  notice  shall  be
    014 * included in all copies or substantial portions of the Software.
    015 *
    016 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
    017 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
    018 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
    019 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    020 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    021 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
    022 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    023 *
    024 */
    025package org.slf4j.helpers;
    026
    027import java.util.Map;
    028
    029import org.slf4j.spi.MDCAdapter;
    030
    031/**
    032 * This adapter is an empty implementation of the {@link MDCAdapter} interface.
    033 * It is used for all logging systems which do not support mapped
    034 * diagnostic contexts such as JDK14, simple and NOP.
    035 *
    036 * @author Ceki G&uuml;lc&uuml;
    037 *
    038 * @since 1.4.1
    039 */
    040public class NOPMDCAdapter implements MDCAdapter {
    041
    042    public void clear() {
    043    }
    044
    045    public String get(String key) {
    046        return null;
    047    }
    048
    049    public void put(String key, String val) {
    050    }
    051
    052    public void remove(String key) {
    053    }
    054
    055    public Map<String, String> getCopyOfContextMap() {
    056        return null;
    057    }
    058
    059    public void setContextMap(Map<String, String> contextMap) {
    060        // NOP
    061    }
    062
    063}