org.apache.avalon.framework.logger
Class NullLogger

java.lang.Object
  org.apache.avalon.framework.logger.NullLogger

All Implemented Interfaces:

Logger

public final class NullLogger

extends java.lang.Object

implements Logger

The Null Logger class. This is useful for implementations where you need to provide a logger to a utility class, but do not want any output from it. It also helps when you have a utility that does not have a logger to supply.

Version:

$Id: NullLogger.java 30977 2004-07-30 08:57:54Z niclas $

Author:

Avalon Development Team

Constructor Summary

NullLogger()
Creates a new NullLogger.

Method Summary

void	debug(java.lang.String message) No-op.
void	debug(java.lang.String message, java.lang.Throwable throwable) No-op.
void	error(java.lang.String message) No-op.
void	error(java.lang.String message, java.lang.Throwable throwable) No-op.
void	fatalError(java.lang.String message) No-op.
void	fatalError(java.lang.String message, java.lang.Throwable throwable) No-op.
Logger	getChildLogger(java.lang.String name) Returns this NullLogger.
void	info(java.lang.String message) No-op.
void	info(java.lang.String message, java.lang.Throwable throwable) No-op.
boolean	isDebugEnabled() No-op.
boolean	isErrorEnabled() No-op.
boolean	isFatalErrorEnabled() No-op.
boolean	isInfoEnabled() No-op.
boolean	isWarnEnabled() No-op.
void	warn(java.lang.String message) No-op.
void	warn(java.lang.String message, java.lang.Throwable throwable) No-op.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NullLogger

public NullLogger()

Creates a new NullLogger.

Method Detail

debug

public void debug(java.lang.String message)

No-op.

Specified by:

debug in interface Logger

Parameters:

message - ignored

debug

public void debug(java.lang.String message,
                  java.lang.Throwable throwable)

No-op.

Specified by:

debug in interface Logger

Parameters:

message - ignored

throwable - ignored

isDebugEnabled

public boolean isDebugEnabled()

No-op.

Specified by:

isDebugEnabled in interface Logger

Returns:

false

info

public void info(java.lang.String message)

No-op.

Specified by:

info in interface Logger

Parameters:

message - ignored

info

public void info(java.lang.String message,
                 java.lang.Throwable throwable)

No-op.

Specified by:

info in interface Logger

Parameters:

message - ignored

throwable - ignored

isInfoEnabled

public boolean isInfoEnabled()

No-op.

Specified by:

isInfoEnabled in interface Logger

Returns:

false

warn

public void warn(java.lang.String message)

No-op.

Specified by:

warn in interface Logger

Parameters:

message - ignored

warn

public void warn(java.lang.String message,
                 java.lang.Throwable throwable)

No-op.

Specified by:

warn in interface Logger

Parameters:

message - ignored

throwable - ignored

isWarnEnabled

public boolean isWarnEnabled()

No-op.

Specified by:

isWarnEnabled in interface Logger

Returns:

false

error

public void error(java.lang.String message)

No-op.

Specified by:

error in interface Logger

Parameters:

message - ignored

error

public void error(java.lang.String message,
                  java.lang.Throwable throwable)

No-op.

Specified by:

error in interface Logger

Parameters:

message - ignored

throwable - ignored

isErrorEnabled

public boolean isErrorEnabled()

No-op.

Specified by:

isErrorEnabled in interface Logger

Returns:

false

fatalError

public void fatalError(java.lang.String message)

No-op.

Specified by:

fatalError in interface Logger

Parameters:

message - ignored

fatalError

public void fatalError(java.lang.String message,
                       java.lang.Throwable throwable)

No-op.

Specified by:

fatalError in interface Logger

Parameters:

message - ignored

throwable - ignored

isFatalErrorEnabled

public boolean isFatalErrorEnabled()

No-op.

Specified by:

isFatalErrorEnabled in interface Logger

Returns:

false

getChildLogger

public Logger getChildLogger(java.lang.String name)

Returns this NullLogger.

Specified by:

getChildLogger in interface Logger

Parameters:

name - ignored

Returns:

this NullLogger