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Java > Open Source Codes > org > slf4j > impl > NOPLogger


1 /*
2  * Copyright (c) 2004-2005 SLF4J.ORG
3  * Copyright (c) 2004-2005 QOS.ch
4  *
5  * All rights reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining
8  * a copy of this software and associated documentation files (the
9  * "Software"), to deal in the Software without restriction, including
10  * without limitation the rights to use, copy, modify, merge, publish,
11  * distribute, and/or sell copies of the Software, and to permit persons
12  * to whom the Software is furnished to do so, provided that the above
13  * copyright notice(s) and this permission notice appear in all copies of
14  * the Software and that both the above copyright notice(s) and this
15  * permission notice appear in supporting documentation.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
20  * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
21  * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY
22  * SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER
23  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
24  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
25  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26  *
27  * Except as contained in this notice, the name of a copyright holder
28  * shall not be used in advertising or otherwise to promote the sale, use
29  * or other dealings in this Software without prior written authorization
30  * of the copyright holder.
31  *
32  */
33
34 package org.slf4j.impl;
35
36 import org.slf4j.Logger;
37 import org.slf4j.helpers.MarkerIgnoringBase;
38
39
40 /**
41  * A direct NOP (no operation) implementation of {@link Logger}.
42  *
43  * @author Ceki Gülcü
44  */
45 public class NOPLogger extends MarkerIgnoringBase {
46   /**
47    * The unique instance of NOPLogger.
48    */
49   public static final NOPLogger NOP_LOGGER = new NOPLogger();
50
51   /**
52    * There is no point in creating multiple instances of NOPLOgger,
53    * except by derived classes, hence the protected access for the constructor.
54    */
55   protected NOPLogger() {
56   }
57
58   /**
59    * Always returns the string value "NOP".
60    */
61   public String JavaDoc getName() {
62     return "NOP";
63   }
64
65   /**
66    * Always returns false.
67    * @return always false
68    */
69   final public boolean isTraceEnabled() {
70     return false;
71   }
72
73   /** A NOP implementation. */
74   final public void trace(String JavaDoc msg) {
75     // NOP
76 }
77
78   /** A NOP implementation. */
79   final public void trace(String JavaDoc format, Object JavaDoc arg) {
80     // NOP
81 }
82
83   /** A NOP implementation. */
84   public final void trace(String JavaDoc format, Object JavaDoc arg1, Object JavaDoc arg2) {
85     // NOP
86 }
87
88   /** A NOP implementation. */
89   public final void trace(String JavaDoc format, Object JavaDoc[] argArray) {
90     // NOP
91 }
92   
93   /** A NOP implementation. */
94   final public void trace(String JavaDoc msg, Throwable JavaDoc t) {
95     // NOP
96 }
97
98   /**
99    * Always returns false.
100    * @return always false
101    */
102   final public boolean isDebugEnabled() {
103     return false;
104   }
105
106   /** A NOP implementation. */
107   final public void debug(String JavaDoc msg) {
108     // NOP
109 }
110
111   /** A NOP implementation. */
112   final public void debug(String JavaDoc format, Object JavaDoc arg) {
113     // NOP
114 }
115
116   /** A NOP implementation. */
117   public final void debug(String JavaDoc format, Object JavaDoc arg1, Object JavaDoc arg2) {
118     // NOP
119 }
120
121   /** A NOP implementation. */
122   public final void debug(String JavaDoc format, Object JavaDoc[] argArray) {
123     // NOP
124 }
125   
126   
127   
128   /** A NOP implementation. */
129   final public void debug(String JavaDoc msg, Throwable JavaDoc t) {
130     // NOP
131 }
132
133   /**
134    * Always returns false.
135    * @return always false
136    */
137   final public boolean isInfoEnabled() {
138     // NOP
139 return false;
140   }
141
142
143   /** A NOP implementation. */
144   final public void info(String JavaDoc msg) {
145     // NOP
146 }
147
148   /** A NOP implementation. */
149   final public void info(String JavaDoc format, Object JavaDoc arg1) {
150     // NOP
151 }
152
153   /** A NOP implementation. */
154   final public void info(String JavaDoc format, Object JavaDoc arg1, Object JavaDoc arg2) {
155     // NOP
156 }
157   
158   /** A NOP implementation. */
159   public final void info(String JavaDoc format, Object JavaDoc[] argArray) {
160     // NOP
161 }
162
163
164   /** A NOP implementation. */
165   final public void info(String JavaDoc msg, Throwable JavaDoc t) {
166     // NOP
167 }
168
169
170   /**
171    * Always returns false.
172    * @return always false
173    */
174   final public boolean isWarnEnabled() {
175     return false;
176   }
177
178   /** A NOP implementation. */
179   final public void warn(String JavaDoc msg) {
180     // NOP
181 }
182
183   /** A NOP implementation. */
184   final public void warn(String JavaDoc format, Object JavaDoc arg1) {
185     // NOP
186 }
187
188   /** A NOP implementation. */
189   final public void warn(String JavaDoc format, Object JavaDoc arg1, Object JavaDoc arg2) {
190     // NOP
191 }
192   
193   /** A NOP implementation. */
194   public final void warn(String JavaDoc format, Object JavaDoc[] argArray) {
195     // NOP
196 }
197
198
199   /** A NOP implementation. */
200   final public void warn(String JavaDoc msg, Throwable JavaDoc t) {
201     // NOP
202 }
203
204
205   /** A NOP implementation. */
206   final public boolean isErrorEnabled() {
207     return false;
208   }
209
210   /** A NOP implementation. */
211   final public void error(String JavaDoc msg) {
212     // NOP
213 }
214
215   /** A NOP implementation. */
216   final public void error(String JavaDoc format, Object JavaDoc arg1) {
217     // NOP
218 }
219
220   /** A NOP implementation. */
221   final public void error(String JavaDoc format, Object JavaDoc arg1, Object JavaDoc arg2) {
222     // NOP
223 }
224   
225   /** A NOP implementation. */
226   public final void error(String JavaDoc format, Object JavaDoc[] argArray) {
227     // NOP
228 }
229
230
231   /** A NOP implementation. */
232   final public void error(String JavaDoc msg, Throwable JavaDoc t) {
233     // NOP
234 }
235 }
236
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