001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.classic.pattern;
015
016import org.slf4j.Marker;
017
018import ch.qos.logback.classic.spi.ILoggingEvent;
019
020/**
021 * Return the event's marker value(s).
022 * 
023 * @author Sébastien Pennec
024 */
025public class MarkerConverter extends ClassicConverter {
026
027    private static String EMPTY = "";
028
029    public String convert(ILoggingEvent le) {
030        Marker marker = le.getMarker();
031        if (marker == null) {
032            return EMPTY;
033        } else {
034            return marker.toString();
035        }
036    }
037
038}