mosgi.jmx.agent/src/main/java/org/apache/felix/mosgi/jmx/agent/mx4j/log/Logger.java

/*
 * Copyright (C) MX4J.
 * All rights reserved.
 *
 * This software is distributed under the terms of the MX4J License version 1.0.
 * See the terms of the MX4J License in the documentation provided with this software.
 */

/*
 *   Copyright 2005 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.felix.mosgi.jmx.agent.mx4j.log;

/**
 * Base class for logging objects.
 *
 * @author <a href="mailto:biorn_steedom@users.sourceforge.net">Simone Bordet</a>
 * @version $Revision: 1.1.1.1 $
 */
public class Logger
{
	public static final int TRACE = 0;
	public static final int DEBUG = TRACE + 10;
	public static final int INFO = DEBUG + 10;
	public static final int WARN = INFO + 10;
	public static final int ERROR = WARN + 10;
	public static final int FATAL = ERROR + 10;

	private int m_priority = WARN;
	private String m_category;

	protected Logger() {}

	public void setPriority(int priority) {m_priority = priority;}
	public int getPriority() {return m_priority;}

	public String getCategory() {return m_category;}
	protected void setCategory(String category) {m_category = category;}

	public final boolean isEnabledFor(int priority)
	{
		return priority >= getPriority();
	}

	public final void fatal(Object message) {log(FATAL, message, null);}
	public final void fatal(Object message, Throwable t) {log(FATAL, message, t);}
	public final void error(Object message) {log(ERROR, message, null);}
	public final void error(Object message, Throwable t) {log(ERROR, message, t);}
	public final void warn(Object message) {log(WARN, message, null);}
	public final void warn(Object message, Throwable t) {log(WARN, message, t);}
	public final void info(Object message) {log(INFO, message, null);}
	public final void info(Object message, Throwable t) {log(INFO, message, t);}
	public final void debug(Object message) {log(DEBUG, message, null);}
	public final void debug(Object message, Throwable t) {log(DEBUG, message, t);}
	public final void trace(Object message) {log(TRACE, message, null);}
	public final void trace(Object message, Throwable t) {log(TRACE, message, t);}

	protected void log(int priority, Object message, Throwable t)
	{
		if (isEnabledFor(priority))
		{
			System.out.println(message);
			if (t != null)
			{
				t.printStackTrace(System.out);
			}
		}
	}
}