Logger.java

/*******************************************************************************
 * This file is part of the Symfony eclipse plugin.
 * 
 * (c) Robert Gruendler <r.gruendler@gmail.com>
 * 
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 ******************************************************************************/
package com.dubture.symfony.twig.log;

import java.util.StringTokenizer;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.dltk.ast.ASTNode;
import org.osgi.framework.Bundle;

import com.dubture.symfony.twig.SymfonyTwigPlugin;

public class Logger {
	
	private static final String PLUGIN_ID = SymfonyTwigPlugin.ID;
	
	private static final String TRACEFILTER_LOCATION = "/debug/tracefilter"; //$NON-NLS-1$

	public static final int OK = IStatus.OK; // 0
	public static final int INFO = IStatus.INFO; // 1
	public static final int WARNING = IStatus.WARNING; // 2
	public static final int ERROR = IStatus.ERROR; // 4

	public static final int OK_DEBUG = 200 + OK;
	public static final int INFO_DEBUG = 200 + INFO;
	public static final int WARNING_DEBUG = 200 + WARNING;
	public static final int ERROR_DEBUG = 200 + ERROR;

	/**
	 * Adds message to log.
	 * 
	 * @param level
	 *            severity level of the message (OK, INFO, WARNING, ERROR,
	 *            OK_DEBUG, INFO_DEBUG, WARNING_DEBUG, ERROR_DEBUG)
	 * @param message
	 *            text to add to the log
	 * @param exception
	 *            exception thrown
	 */
	protected static void _log(int level, String message, Throwable exception) {
		if (level == OK_DEBUG || level == INFO_DEBUG || level == WARNING_DEBUG
				|| level == ERROR_DEBUG) {
			if (!isDebugging())
				return;
		}

		int severity = IStatus.OK;
		switch (level) {
		case INFO_DEBUG:
		case INFO:
			severity = IStatus.INFO;
			break;
		case WARNING_DEBUG:
		case WARNING:
			severity = IStatus.WARNING;
			break;
		case ERROR_DEBUG:
		case ERROR:
			severity = IStatus.ERROR;
		}
		message = (message != null) ? message : "null"; //$NON-NLS-1$
		Status statusObj = new Status(severity, PLUGIN_ID, severity, message,
				exception);
		Bundle bundle = Platform.getBundle(PLUGIN_ID);
		if (bundle != null)
			Platform.getLog(bundle).log(statusObj);
		debugMSG(statusObj.toString());

	}

	/**
	 * Prints message to log if category matches /debug/tracefilter option.
	 * 
	 * @param message
	 *            text to print
	 * @param category
	 *            category of the message, to be compared with
	 *            /debug/tracefilter
	 */
	protected static void _trace(String category, String message,
			Throwable exception) {
		if (isTracing(category)) {
			message = (message != null) ? message : "null"; //$NON-NLS-1$
			Status statusObj = new Status(IStatus.OK, PLUGIN_ID, IStatus.OK,
					message, exception);
			Bundle bundle = Platform.getBundle(PLUGIN_ID);
			if (bundle != null)
				Platform.getLog(bundle).log(statusObj);
		}
	}

	/**
	 * @return true if the platform is debugging
	 */
	public static boolean isDebugging() {
		return Platform.inDebugMode();
	}

	/**
	 * Determines if currently tracing a category
	 * 
	 * @param category
	 * @return true if tracing category, false otherwise
	 */
	public static boolean isTracing(String category) {
		if (!isDebugging())
			return false;

		String traceFilter = Platform.getDebugOption(PLUGIN_ID
				+ TRACEFILTER_LOCATION);
		if (traceFilter != null) {
			StringTokenizer tokenizer = new StringTokenizer(traceFilter, ","); //$NON-NLS-1$
			while (tokenizer.hasMoreTokens()) {
				String cat = tokenizer.nextToken().trim();
				if (category.equals(cat)) {
					return true;
				}
			}
		}
		return false;
	}

	public static void log(int level, String message) {
		_log(level, message, null);
	}

	public static void log(int level, String message, Throwable exception) {
		_log(level, message, exception);
	}

	public static void logException(String message, Throwable exception) {
		_log(ERROR, message, exception);
	}

	public static void logException(Throwable exception) {
		
		_log(ERROR, exception.getMessage(), exception);
		
	}

	public static void traceException(String category, String message,
			Throwable exception) {
		_trace(category, message, exception);
	}

	public static void traceException(String category, Throwable exception) {
		_trace(category, exception.getMessage(), exception);
	}

	public static void trace(String category, String message) {
		_trace(category, message, null);
	}

	public static void debugMSG(String msg) {
		if (SymfonyTwigPlugin.debug())
			System.out.println(msg);
	}

	public static void debugMSG(Class<? extends ASTNode> class1) {

		debugMSG(class1.toString());
		
	}	
	

}