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 package org.apache.commons.logging.impl;
18
19 import java.io.Serializable;
20 import org.apache.commons.logging.Log;
21
22 /**
23 * <p>
24 * Trivial implementation of Log that throws away all messages. No configurable
25 * system properties are supported.
26 *
27 *
28 * @author <a href="mailto:sanders@apache.org">Scott Sanders</a>
29 * @author Rod Waldhoff
30 * @version $Id: NoOpLog.java,v 1.8 2004/06/06 21:13:12 rdonkin Exp $
31 */
32 public class NoOpLog implements Log, Serializable {
33 private static final long serialVersionUID = 561423906191706148L;
34
35 /** Convenience constructor */
36 public NoOpLog() {
37 }
38
39 /** Base constructor */
40 public NoOpLog(String name) {
41 }
42
43 /** Do nothing */
44 public void trace(Object message) {
45 }
46
47 /** Do nothing */
48 public void trace(Object message, Throwable t) {
49 }
50
51 /** Do nothing */
52 public void debug(Object message) {
53 }
54
55 /** Do nothing */
56 public void debug(Object message, Throwable t) {
57 }
58
59 /** Do nothing */
60 public void info(Object message) {
61 }
62
63 /** Do nothing */
64 public void info(Object message, Throwable t) {
65 }
66
67 /** Do nothing */
68 public void warn(Object message) {
69 }
70
71 /** Do nothing */
72 public void warn(Object message, Throwable t) {
73 }
74
75 /** Do nothing */
76 public void error(Object message) {
77 }
78
79 /** Do nothing */
80 public void error(Object message, Throwable t) {
81 }
82
83 /** Do nothing */
84 public void fatal(Object message) {
85 }
86
87 /** Do nothing */
88 public void fatal(Object message, Throwable t) {
89 }
90
91 /**
92 * Debug is never enabled.
93 *
94 * @return false
95 */
96 public final boolean isDebugEnabled() {
97 return false;
98 }
99
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 }