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.helpers;
015
016import java.util.ArrayList;
017import java.util.List;
018
019import ch.qos.logback.classic.PatternLayout;
020import ch.qos.logback.classic.spi.ILoggingEvent;
021import ch.qos.logback.core.AppenderBase;
022
023/**
024 * An appender used for testing.
025 * 
026 * @author ceki
027 * @param <E>
028 * @since 1.3.0
029 */
030public class WithLayoutListAppender extends AppenderBase<ILoggingEvent> {
031
032    public List<String> list = new ArrayList<>();
033
034    String pattern;
035
036    PatternLayout patternLayout;
037
038    @Override
039    public void start() {
040        if (pattern == null) {
041            addError("null pattern disallowed");
042            return;
043        }
044        patternLayout = new PatternLayout();
045        patternLayout.setContext(context);
046        patternLayout.setPattern(pattern);
047        patternLayout.start();
048        if (patternLayout.isStarted())
049            super.start();
050    }
051
052    protected void append(ILoggingEvent e) {
053        String result = patternLayout.doLayout(e);
054        list.add(result);
055    }
056
057    public String getPattern() {
058        return pattern;
059    }
060
061    public void setPattern(String pattern) {
062        this.pattern = pattern;
063    }
064
065}