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 */ 017 018 019 package org.apache.commons.logging.impl; 020 021 022 import java.io.Serializable; 023 import org.apache.commons.logging.Log; 024 025 026 /** 027 * <p>Trivial implementation of Log that throws away all messages. No 028 * configurable system properties are supported.</p> 029 * 030 * @author <a href="mailto:sanders@apache.org">Scott Sanders</a> 031 * @author Rod Waldhoff 032 * @version $Id: NoOpLog.java 424107 2006-07-20 23:15:42Z skitching $ 033 */ 034 public class NoOpLog implements Log, Serializable { 035 036 /** Convenience constructor */ 037 public NoOpLog() { } 038 /** Base constructor */ 039 public NoOpLog(String name) { } 040 /** Do nothing */ 041 public void trace(Object message) { } 042 /** Do nothing */ 043 public void trace(Object message, Throwable t) { } 044 /** Do nothing */ 045 public void debug(Object message) { } 046 /** Do nothing */ 047 public void debug(Object message, Throwable t) { } 048 /** Do nothing */ 049 public void info(Object message) { } 050 /** Do nothing */ 051 public void info(Object message, Throwable t) { } 052 /** Do nothing */ 053 public void warn(Object message) { } 054 /** Do nothing */ 055 public void warn(Object message, Throwable t) { } 056 /** Do nothing */ 057 public void error(Object message) { } 058 /** Do nothing */ 059 public void error(Object message, Throwable t) { } 060 /** Do nothing */ 061 public void fatal(Object message) { } 062 /** Do nothing */ 063 public void fatal(Object message, Throwable t) { } 064 065 /** 066 * Debug is never enabled. 067 * 068 * @return false 069 */ 070 public final boolean isDebugEnabled() { return false; } 071 072 /** 073 * Error is never enabled. 074 * 075 * @return false 076 */ 077 public final boolean isErrorEnabled() { return false; } 078 079 /** 080 * Fatal is never enabled. 081 * 082 * @return false 083 */ 084 public final boolean isFatalEnabled() { return false; } 085 086 /** 087 * Info is never enabled. 088 * 089 * @return false 090 */ 091 public final boolean isInfoEnabled() { return false; } 092 093 /** 094 * Trace is never enabled. 095 * 096 * @return false 097 */ 098 public final boolean isTraceEnabled() { return false; } 099 100 /** 101 * Warn is never enabled. 102 * 103 * @return false 104 */ 105 public final boolean isWarnEnabled() { return false; } 106 107 }