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 ch.qos.logback.classic.spi.CallerData;
017import ch.qos.logback.classic.spi.ILoggingEvent;
018import ch.qos.logback.core.CoreConstants;
019
020public class LineOfCallerConverter extends ClassicConverter {
021
022    public String convert(ILoggingEvent le) {
023        StackTraceElement[] cda = le.getCallerData();
024        if (cda != null && cda.length > 0) {
025            return Integer.toString(cda[0].getLineNumber());
026        } else {
027            return CoreConstants.NA;
028        }
029    }
030
031}