/* * Copyright 1999-2005 The Apache Software Foundation. *  * Licensed 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 *  *      http://www.apache.org/licenses/LICENSE-2.0 *  * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * 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;   public  void setLevelToMatch(String level) {    levelToMatch = OptionConverter.toLevel(level, null);  }    public  String getLevelToMatch() {    return levelToMatch == null ? null : levelToMatch.toString();  }    public  void setAcceptOnMatch(boolean acceptOnMatch) {    this.acceptOnMatch = acceptOnMatch;  }    public  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.  */  public  int decide(LoggingEvent event) {    if(this.levelToMatch == null) {      return Filter.NEUTRAL;    }        boolean matchOccured = false;    if(this.levelToMatch.equals(event.getLevel())) {      matchOccured = true;    }     if(matchOccured) {        if(this.acceptOnMatch)	  return Filter.ACCEPT;      else	  return Filter.DENY;    } else {      return Filter.NEUTRAL;    }  }}