Source Code for Apache Log4j 1.2.17

Apache Log4j provides the interface that applications should code to and provides the adapter components required for implementers to create a logging implementation.

Bytecode (Java 1.4) for Apache Log4j is provided in a JAR file like log4j-1.2.17.jar.

Source Code files for Apache Log4j are provided in both binary packge like and source package like You can download them at Apache Log4j Website.

You can also browse Source Code files for Apache Log4j 1.2.17 below.



 * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.log4j.varia;

import org.apache.log4j.Level;
import org.apache.log4j.spi.Filter;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.helpers.OptionConverter;

   This is a very simple filter based on level matching.

   <p>The filter admits two options <b>LevelToMatch</b> and
   <b>AcceptOnMatch</b>. If there is an exact match between the value
   of the <b>LevelToMatch</b> option and the level of the {@link
   LoggingEvent}, then the {@link #decide} method returns {@link
   Filter#ACCEPT} in case the <b>AcceptOnMatch</b> option value is set
   to <code>true</code>, if it is <code>false</code> then {@link
   Filter#DENY} is returned. If there is no match, {@link
   Filter#NEUTRAL} is returned.

   @author Ceki G&uuml;lc&uuml;

   @since 1.2 */
public class LevelMatchFilter extends Filter {
     Do we return ACCEPT when a match occurs. Default is
     <code>true</code>.  */
  boolean acceptOnMatch = true;

  Level levelToMatch;

  void setLevelToMatch(String level) {
    levelToMatch = OptionConverter.toLevel(level, null);
  String getLevelToMatch() {
    return levelToMatch == null ? null : levelToMatch.toString();
  void setAcceptOnMatch(boolean acceptOnMatch) {
    this.acceptOnMatch = acceptOnMatch;
  boolean getAcceptOnMatch() {
    return acceptOnMatch;

     Return the decision of this filter.

     Returns {@link Filter#NEUTRAL} if the <b>LevelToMatch</b> option
     is not set or if there is not match.  Otherwise, if there is a
     match, then the returned decision is {@link Filter#ACCEPT} if the
     <b>AcceptOnMatch</b> property is set to <code>true</code>. The
     returned decision is {@link Filter#DENY} if the
     <b>AcceptOnMatch</b> property is set to false.

  int decide(LoggingEvent event) {
    if(this.levelToMatch == null) {
      return Filter.NEUTRAL;
    boolean matchOccured = false;
    if(this.levelToMatch.equals(event.getLevel())) {
      matchOccured = true;

    if(matchOccured) {  
	  return Filter.ACCEPT;
	  return Filter.DENY;
    } else {
      return Filter.NEUTRAL;



Or download all of them as a single archive file:

File name: log4j-1.2.17-sources.jar
File size: 481200 bytes
Release date: 2012-05-06


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