| /* |
| * 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 |
| * |
| * 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 examples; |
| |
| import org.apache.log4j.helpers.FormattingInfo; |
| import org.apache.log4j.helpers.PatternConverter; |
| import org.apache.log4j.helpers.PatternParser; |
| import org.apache.log4j.spi.LoggingEvent; |
| |
| /** |
| Example showing how to extend PatternParser to recognize additional |
| conversion characters. The examples shows that minimum and maximum |
| width and alignment settings apply for "extension" conversion |
| characters just as they do for PatternLayout recognized characters. |
| |
| <p>In this case MyPatternParser recognizes %# and outputs the value |
| of an internal counter which is also incremented at each call. |
| |
| See <a href=doc-files/MyPatternParser.java><b>source</b></a> code |
| for more details. |
| |
| @see org.apache.log4j.examples.MyPatternLayout |
| @see org.apache.log4j.helpers.PatternParser |
| @see org.apache.log4j.PatternLayout |
| |
| @author Anders Kristensen |
| */ |
| public class MyPatternParser extends PatternParser { |
| |
| int counter = 0; |
| |
| public |
| MyPatternParser(String pattern) { |
| super(pattern); |
| } |
| |
| public |
| void finalizeConverter(char c) { |
| if (c == '#') { |
| addConverter(new UserDirPatternConverter(formattingInfo)); |
| currentLiteral.setLength(0); |
| } else { |
| super.finalizeConverter(c); |
| } |
| } |
| |
| private class UserDirPatternConverter extends PatternConverter { |
| UserDirPatternConverter(FormattingInfo formattingInfo) { |
| super(formattingInfo); |
| } |
| |
| public |
| String convert(LoggingEvent event) { |
| return String.valueOf(++counter); |
| } |
| } |
| } |