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      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 (at) apache.org">Scott Sanders</a>
     30  * @author Rod Waldhoff
     31  * @version $Id: NoOpLog.java 155426 2005-02-26 13:10:49Z dirkv $
     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 }
    107