1. /*

  2.  * Copyright 2001-2004 The Apache Software Foundation.

  3.  * 

  4.  * Licensed under the Apache License, Version 2.0 (the "License");

  5.  * you may not use this file except in compliance with the License.

  6.  * You may obtain a copy of the License at

  7.  * 

  8.  *      http://www.apache.org/licenses/LICENSE-2.0

  9.  * 

  10.  * Unless required by applicable law or agreed to in writing, software

  11.  * distributed under the License is distributed on an "AS IS" BASIS,

  12.  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  13.  * See the License for the specific language governing permissions and

  14.  * limitations under the License.

  15.  */ 

  16. 

  17. 

  18. package org.apache.commons.logging.impl;

  19. 

  20. 

  21. import java.io.Serializable;

  22. import org.apache.commons.logging.Log;

  23. 

  24. 

  25. /**

  26.  * <p>Trivial implementation of Log that throws away all messages.  No

  27.  * configurable system properties are supported.</p>

  28.  *

  29.  * @author <a href="mailto:sanders@apache.org">Scott Sanders</a>

  30.  * @author Rod Waldhoff

  31.  * @version $Id: NoOpLog.java,v 1.8 2004/06/06 21:13:12 rdonkin Exp $

  32.  */

  33. public class NoOpLog implements Log, Serializable {

  34. 

  35.     /** Convenience constructor */

  36.     public NoOpLog() { }

  37.     /** Base constructor */

  38.     public NoOpLog(String name) { }

  39.     /** Do nothing */

  40.     public void trace(Object message) { }

  41.     /** Do nothing */

  42.     public void trace(Object message, Throwable t) { }

  43.     /** Do nothing */

  44.     public void debug(Object message) { }

  45.     /** Do nothing */

  46.     public void debug(Object message, Throwable t) { }

  47.     /** Do nothing */

  48.     public void info(Object message) { }

  49.     /** Do nothing */

  50.     public void info(Object message, Throwable t) { }

  51.     /** Do nothing */

  52.     public void warn(Object message) { }

  53.     /** Do nothing */

  54.     public void warn(Object message, Throwable t) { }

  55.     /** Do nothing */

  56.     public void error(Object message) { }

  57.     /** Do nothing */

  58.     public void error(Object message, Throwable t) { }

  59.     /** Do nothing */

  60.     public void fatal(Object message) { }

  61.     /** Do nothing */

  62.     public void fatal(Object message, Throwable t) { }

  63. 

  64.     /**

  65.      * Debug is never enabled.

  66.      *

  67.      * @return false

  68.      */

  69.     public final boolean isDebugEnabled() { return false; }

  70. 

  71.     /**

  72.      * Error is never enabled.

  73.      *

  74.      * @return false

  75.      */

  76.     public final boolean isErrorEnabled() { return false; }

  77. 

  78.     /**

  79.      * Fatal is never enabled.

  80.      *

  81.      * @return false

  82.      */

  83.     public final boolean isFatalEnabled() { return false; }

  84. 

  85.     /**

  86.      * Info is never enabled.

  87.      *

  88.      * @return false

  89.      */

  90.     public final boolean isInfoEnabled() { return false; }

  91. 

  92.     /**

  93.      * Trace is never enabled.

  94.      *

  95.      * @return false

  96.      */

  97.     public final boolean isTraceEnabled() { return false; }

  98. 

  99.     /**

  100.      * Warn is never enabled.

  101.      *

  102.      * @return false

  103.      */

  104.     public final boolean isWarnEnabled() { return false; }

  105. 

  106. }