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 }