001/*
002 * Copyright 2001-2004 The Apache Software Foundation.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.apache.commons.logging.impl;
018
019import java.io.Serializable;
020import org.apache.commons.logging.Log;
021
022/**
023 * <p>
024 * Trivial implementation of Log that throws away all messages. No configurable
025 * system properties are supported.
026 * 
027 * 
028 * @author <a href="mailto:sanders@apache.org">Scott Sanders</a>
029 * @author Rod Waldhoff
030 * @version $Id: NoOpLog.java,v 1.8 2004/06/06 21:13:12 rdonkin Exp $
031 */
032public class NoOpLog implements Log, Serializable {
033    private static final long serialVersionUID = 561423906191706148L;
034
035    /** Convenience constructor */
036    public NoOpLog() {
037    }
038
039    /** Base constructor */
040    public NoOpLog(String name) {
041    }
042
043    /** Do nothing */
044    public void trace(Object message) {
045    }
046
047    /** Do nothing */
048    public void trace(Object message, Throwable t) {
049    }
050
051    /** Do nothing */
052    public void debug(Object message) {
053    }
054
055    /** Do nothing */
056    public void debug(Object message, Throwable t) {
057    }
058
059    /** Do nothing */
060    public void info(Object message) {
061    }
062
063    /** Do nothing */
064    public void info(Object message, Throwable t) {
065    }
066
067    /** Do nothing */
068    public void warn(Object message) {
069    }
070
071    /** Do nothing */
072    public void warn(Object message, Throwable t) {
073    }
074
075    /** Do nothing */
076    public void error(Object message) {
077    }
078
079    /** Do nothing */
080    public void error(Object message, Throwable t) {
081    }
082
083    /** Do nothing */
084    public void fatal(Object message) {
085    }
086
087    /** Do nothing */
088    public void fatal(Object message, Throwable t) {
089    }
090
091    /**
092     * Debug is never enabled.
093     * 
094     * @return false
095     */
096    public final boolean isDebugEnabled() {
097        return false;
098    }
099
100    /**
101     * Error is never enabled.
102     * 
103     * @return false
104     */
105    public final boolean isErrorEnabled() {
106        return false;
107    }
108
109    /**
110     * Fatal is never enabled.
111     * 
112     * @return false
113     */
114    public final boolean isFatalEnabled() {
115        return false;
116    }
117
118    /**
119     * Info is never enabled.
120     * 
121     * @return false
122     */
123    public final boolean isInfoEnabled() {
124        return false;
125    }
126
127    /**
128     * Trace is never enabled.
129     * 
130     * @return false
131     */
132    public final boolean isTraceEnabled() {
133        return false;
134    }
135
136    /**
137     * Warn is never enabled.
138     * 
139     * @return false
140     */
141    public final boolean isWarnEnabled() {
142        return false;
143    }
144
145}