Log.java

package org.codemap.util;

import org.codemap.CodemapCore;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;


public class Log {

	/**
	 * Log the specified information.
	 * 
	 * @param message
	 *            , a human-readable message, localized to the current locale.
	 */
	public static void info(String message) {
		log(IStatus.INFO, IStatus.OK, message, null);
	}

	/**
	 * Log the specified error.
	 * 
	 * @param exception
	 *            , a low-level exception.
	 */
	public static void error(Throwable exception) {
		error("Unexpected Exception", exception);
	}

	/**
	 * Log the specified error.
	 * 
	 * @param message
	 *            , a human-readable message, localized to the current locale.
	 * @param exception
	 *            , a low-level exception, or <code>null</code> if not applicable.
	 */
	public static void error(String message, Throwable exception) {
		log(IStatus.ERROR, IStatus.OK, message, exception);
	}
	
	public static void warning(String message, Throwable exception) {
	    log(IStatus.WARNING, IStatus.OK, message, exception);
	}

	/**
	 * Log the specified information.
	 * 
	 * @param severity
	 *            , the severity; one of the following: <code>IStatus.OK</code>, <code>IStatus.ERROR</code>,
	 *            <code>IStatus.INFO</code>, or <code>IStatus.WARNING</code>.
	 * @param pluginId
	 *            . the unique identifier of the relevant plug-in.
	 * @param code
	 *            , the plug-in-specific status code, or <code>OK</code>.
	 * @param message
	 *            , a human-readable message, localized to the current locale.
	 * @param exception
	 *            , a low-level exception, or <code>null</code> if not applicable.
	 */
	private static void log(int severity, int code, String message, Throwable exception) {
		log(createStatus(severity, code, message, exception));
	}

	/**
	 * Create a status object representing the specified information.
	 * 
	 * @param severity
	 *            , the severity; one of the following: <code>IStatus.OK</code>, <code>IStatus.ERROR</code>,
	 *            <code>IStatus.INFO</code>, or <code>IStatus.WARNING</code>.
	 * @param pluginId
	 *            , the unique identifier of the relevant plug-in.
	 * @param code
	 *            , the plug-in-specific status code, or <code>OK</code>.
	 * @param message
	 *            , a human-readable message, localized to the current locale.
	 * @param exception
	 *            , a low-level exception, or <code>null</code> if not applicable.
	 * @return, the status object (not <code>null</code>).
	 */
	private static IStatus createStatus(int severity, int code, String message, Throwable exception) {
		return new Status(severity, CodemapCore.PLUGIN_ID, code, message, exception);
	}

	/**
	 * Log the given status.
	 * 
	 * @param status
	 *            , the status to log.
	 */
	private static void log(IStatus status) {
		CodemapCore.getPlugin().getLog().log(status);
	}

	public static void instantiatePluginError(Exception e, IConfigurationElement configElement, String attClass) {
		String msg = "Failed to instatiate plugin: " + configElement.getAttribute(attClass)
		+ " in plugin: "+ configElement.getDeclaringExtension().getNamespaceIdentifier();
		error(msg, e);
	}

}