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.commons.logging.impl;
019
020import java.io.Serializable;
021import org.apache.commons.logging.Log;
022
023/**
024 * Trivial implementation of Log that throws away all messages.  No
025 * configurable system properties are supported.
026 *
027 * @version $Id: NoOpLog.html 915605 2014-07-09 20:22:43Z tn $
028 */
029public class NoOpLog implements Log, Serializable {
030
031    /** Serializable version identifier. */
032    private static final long serialVersionUID = 561423906191706148L;
033
034    /** Convenience constructor */
035    public NoOpLog() { }
036    /** Base constructor */
037    public NoOpLog(String name) { }
038    /** Do nothing */
039    public void trace(Object message) { }
040    /** Do nothing */
041    public void trace(Object message, Throwable t) { }
042    /** Do nothing */
043    public void debug(Object message) { }
044    /** Do nothing */
045    public void debug(Object message, Throwable t) { }
046    /** Do nothing */
047    public void info(Object message) { }
048    /** Do nothing */
049    public void info(Object message, Throwable t) { }
050    /** Do nothing */
051    public void warn(Object message) { }
052    /** Do nothing */
053    public void warn(Object message, Throwable t) { }
054    /** Do nothing */
055    public void error(Object message) { }
056    /** Do nothing */
057    public void error(Object message, Throwable t) { }
058    /** Do nothing */
059    public void fatal(Object message) { }
060    /** Do nothing */
061    public void fatal(Object message, Throwable t) { }
062
063    /**
064     * Debug is never enabled.
065     *
066     * @return false
067     */
068    public final boolean isDebugEnabled() { return false; }
069
070    /**
071     * Error is never enabled.
072     *
073     * @return false
074     */
075    public final boolean isErrorEnabled() { return false; }
076
077    /**
078     * Fatal is never enabled.
079     *
080     * @return false
081     */
082    public final boolean isFatalEnabled() { return false; }
083
084    /**
085     * Info is never enabled.
086     *
087     * @return false
088     */
089    public final boolean isInfoEnabled() { return false; }
090
091    /**
092     * Trace is never enabled.
093     *
094     * @return false
095     */
096    public final boolean isTraceEnabled() { return false; }
097
098    /**
099     * Warn is never enabled.
100     *
101     * @return false
102     */
103    public final boolean isWarnEnabled() { return false; }
104}