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/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ 


package org.apache.commons.logging.impl;

import java.io.Serializable;
import org.apache.commons.logging.Log;
import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.log4j.Level;

/**
 * 

Implementation of {@link Log} that maps directly to a Log4J * Logger. Initial configuration of the corresponding * Logger instances should be done in the usual manner, as outlined in * the Log4J documentation.

* * @author Scott Sanders * @author Rod Waldhoff * @author Robert Burrell Donkin * @version $Id: Log4JLogger.java,v 1.11 2004/05/19 21:01:23 rdonkin Exp $ */ public class Log4JLogger implements Log, Serializable { // ------------------------------------------------------------- Attributes /** The fully qualified name of the Log4JLogger class. */ private static final String FQCN = Log4JLogger.class.getName(); private static final boolean is12 = Priority.class.isAssignableFrom(Level.class); /** Log to this logger */ private transient Logger logger = null; /** Logger name */ private String name = null; // ------------------------------------------------------------ Constructor public Log4JLogger() { } /** * Base constructor. */ public Log4JLogger(String name) { this.name = name; this.logger = getLogger(); } /** For use with a log4j factory. */ public Log4JLogger(Logger logger ) { this.name = logger.getName(); this.logger=logger; } // --------------------------------------------------------- Implementation /** * Log a message to the Log4j Logger with TRACE priority. * Currently logs to DEBUG level in Log4J. */ public void trace(Object message) { if(is12) { getLogger().log(FQCN, (Priority) Level.DEBUG, message, null ); } else { getLogger().log(FQCN, Level.DEBUG, message, null ); } } /** * Log an error to the Log4j Logger with TRACE priority. * Currently logs to DEBUG level in Log4J. */ public void trace(Object message, Throwable t) { if(is12) { getLogger().log(FQCN, (Priority) Level.DEBUG, message, t ); } else { getLogger().log(FQCN, Level.DEBUG, message, t ); } } /** * Log a message to the Log4j Logger with DEBUG priority. */ public void debug(Object message) { if(is12) { getLogger().log(FQCN, (Priority) Level.DEBUG, message, null ); } else { getLogger().log(FQCN, Level.DEBUG, message, null ); } } /** * Log an error to the Log4j Logger with DEBUG priority. */ public void debug(Object message, Throwable t) { if(is12) { getLogger().log(FQCN, (Priority) Level.DEBUG, message, t ); } else { getLogger().log(FQCN, Level.DEBUG, message, t ); } } /** * Log a message to the Log4j Logger with INFO priority. */ public void info(Object message) { if(is12) { getLogger().log(FQCN, (Priority) Level.INFO, message, null ); } else { getLogger().log(FQCN, Level.INFO, message, null ); } } /** * Log an error to the Log4j Logger with INFO priority. */ public void info(Object message, Throwable t) { if(is12) { getLogger().log(FQCN, (Priority) Level.INFO, message, t ); } else { getLogger().log(FQCN, Level.INFO, message, t ); } } /** * Log a message to the Log4j Logger with WARN priority. */ public void warn(Object message) { if(is12) { getLogger().log(FQCN, (Priority) Level.WARN, message, null ); } else { getLogger().log(FQCN, Level.WARN, message, null ); } } /** * Log an error to the Log4j Logger with WARN priority. */ public void warn(Object message, Throwable t) { if(is12) { getLogger().log(FQCN, (Priority) Level.WARN, message, t ); } else { getLogger().log(FQCN, Level.WARN, message, t ); } } /** * Log a message to the Log4j Logger with ERROR priority. */ public void error(Object message) { if(is12) { getLogger().log(FQCN, (Priority) Level.ERROR, message, null ); } else { getLogger().log(FQCN, Level.ERROR, message, null ); } } /** * Log an error to the Log4j Logger with ERROR priority. */ public void error(Object message, Throwable t) { if(is12) { getLogger().log(FQCN, (Priority) Level.ERROR, message, t ); } else { getLogger().log(FQCN, Level.ERROR, message, t ); } } /** * Log a message to the Log4j Logger with FATAL priority. */ public void fatal(Object message) { if(is12) { getLogger().log(FQCN, (Priority) Level.FATAL, message, null ); } else { getLogger().log(FQCN, Level.FATAL, message, null ); } } /** * Log an error to the Log4j Logger with FATAL priority. */ public void fatal(Object message, Throwable t) { if(is12) { getLogger().log(FQCN, (Priority) Level.FATAL, message, t ); } else { getLogger().log(FQCN, Level.FATAL, message, t ); } } /** * Return the native Logger instance we are using. */ public Logger getLogger() { if (logger == null) { logger = Logger.getLogger(name); } return (this.logger); } /** * Check whether the Log4j Logger used is enabled for DEBUG priority. */ public boolean isDebugEnabled() { return getLogger().isDebugEnabled(); } /** * Check whether the Log4j Logger used is enabled for ERROR priority. */ public boolean isErrorEnabled() { if(is12) { return getLogger().isEnabledFor((Priority) Level.ERROR); } else { return getLogger().isEnabledFor(Level.ERROR); } } /** * Check whether the Log4j Logger used is enabled for FATAL priority. */ public boolean isFatalEnabled() { if(is12) { return getLogger().isEnabledFor((Priority) Level.FATAL); } else { return getLogger().isEnabledFor(Level.FATAL); } } /** * Check whether the Log4j Logger used is enabled for INFO priority. */ public boolean isInfoEnabled() { return getLogger().isInfoEnabled(); } /** * Check whether the Log4j Logger used is enabled for TRACE priority. * For Log4J, this returns the value of isDebugEnabled() */ public boolean isTraceEnabled() { return getLogger().isDebugEnabled(); } /** * Check whether the Log4j Logger used is enabled for WARN priority. */ public boolean isWarnEnabled() { if(is12) { return getLogger().isEnabledFor((Priority) Level.WARN); } else { return getLogger().isEnabledFor(Level.WARN); } } }


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