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 }