001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.log4j; 019 020import org.apache.log4j.spi.LoggingEvent; 021 022/** 023 SimpleLayout consists of the level of the log statement, 024 followed by " - " and then the log message itself. For example, 025 026 <pre> 027 DEBUG - Hello world 028 </pre> 029 030 <p> 031 @author Ceki Gülcü 032 @since version 0.7.0 033 034 <p>{@link PatternLayout} offers a much more powerful alternative. 035*/ 036public class SimpleLayout extends Layout { 037 038 StringBuffer sbuf = new StringBuffer(128); 039 040 public SimpleLayout() { 041 } 042 043 public 044 void activateOptions() { 045 } 046 047 /** 048 Returns the log statement in a format consisting of the 049 <code>level</code>, followed by " - " and then the 050 <code>message</code>. For example, <pre> INFO - "A message" 051 </pre> 052 053 <p>The <code>category</code> parameter is ignored. 054 <p> 055 @return A byte array in SimpleLayout format. 056 */ 057 public 058 String format(LoggingEvent event) { 059 060 sbuf.setLength(0); 061 sbuf.append(event.getLevel().toString()); 062 sbuf.append(" - "); 063 sbuf.append(event.getRenderedMessage()); 064 sbuf.append(LINE_SEP); 065 return sbuf.toString(); 066 } 067 068/** 069 The SimpleLayout does not handle the throwable contained within 070 {@link LoggingEvent LoggingEvents}. Thus, it returns 071 <code>true</code>. 072 073 @since version 0.8.4 */ 074 public 075 boolean ignoresThrowable() { 076 return true; 077 } 078}