/*******************************************************************************
 * Copyright (c) 2009 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * IBM Corporation - initial API and implementation
 * yyyymmdd bug      Email and other contact information
 * -------- -------- -----------------------------------------------------------
 * 20091021   291954 ericdp@ca.ibm.com - Eric D. Peters, JAX-RS: Implement JAX-RS Facet
 * 20091106   291954 ericdp@ca.ibm.com - Eric D. Peters, JAX-RS: Implement JAX-RS Facet
 *******************************************************************************/
package org.eclipse.jst.ws.jaxrs.ui.internal;

import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jst.ws.jaxrs.core.internal.JAXRSCorePlugin;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * JAXRS UI plugin.
 */
public class JAXRSUIPlugin extends AbstractUIPlugin {

	/**
	 * The plugin id
	 */
	public static final String PLUGIN_ID = "org.eclipse.jst.ws.jaxrs.ui"; //$NON-NLS-1$
	// The shared instance.
	private static JAXRSUIPlugin plugin;

	/**
	 * The constructor.
	 */
	public JAXRSUIPlugin() {
		plugin = this;
	}

	/**
	 * This method is called upon plug-in activation
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		JAXRSCorePlugin.getDefault().setJAXRSUIDialogSettings(
				getDialogSettings());
	}

	/**
	 * This method is called when the plug-in is stopped
	 */
	public void stop(BundleContext context) throws Exception {
		super.stop(context);
		plugin = null;
	}

	/**
	 * Returns the shared instance.
	 * 
	 * @return the default plugin instance
	 */
	public static JAXRSUIPlugin getDefault() {
		return plugin;
	}

	/**
	 * Returns an image descriptor for the image file at the given plug-in
	 * relative path.
	 * 
	 * @param path
	 *            the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path) {
		path = "icons/" + path; //$NON-NLS-1$
		return AbstractUIPlugin.imageDescriptorFromPlugin(
				"org.eclipse.jst.ws.jaxrs.ui", path); //$NON-NLS-1$
	}

	/**
	 * Returns a shared image for the given name
	 * <p>
	 * Note: Images returned from this method will be automitically disposed of
	 * when this plug-in shuts down. Callers must not dispose of these images
	 * themselves.
	 * </p>
	 * 
	 * @param name
	 *            the image name found in /icons (with extension)
	 * @return the image, null on error or not found.
	 */
	public Image getImage(String name) {
		if (name == null) {
			return null;
		}

		ImageRegistry images = getImageRegistry();
		Image image = images.get(name);
		if (image == null) {
			try {
				final URL pluginBase = getBundle().getEntry("/");
				;
				ImageDescriptor id = ImageDescriptor.createFromURL(new URL(
						pluginBase, "icons/" + name));
				images.put(name, id);

				image = images.get(name);
			} catch (MalformedURLException ee) {
				// log.CommonPlugin.image.error=Image {0} not found.
				// .error("log.msg", "log.CommonPlugin.image.error", name, ee);
				log(IStatus.ERROR, "Loading image", ee);
			}
		}
		return image;
	}

	/**
	 * @return the plugin id
	 */
	public String getPluginID() {
		return PLUGIN_ID;
	}

	/**
	 * Logs using the default ILog implementation provided by getLog().
	 * 
	 * @param severity
	 *            Severity (IStatus constant) of log entry
	 * @param message
	 *            Human-readable message describing log entry
	 * @param ex
	 *            Throwable instance (can be null)
	 */
	public static void log(int severity, String message, Throwable ex) {
		getDefault().getLog().log(
				new Status(severity, PLUGIN_ID, IStatus.OK, message, ex));
	}

	/**
	 * Logs using the default ILog implementation provided by getLog().
	 * 
	 * @param severity
	 *            Severity (IStatus constant) of log entry
	 * @param message
	 *            Human-readable message describing log entry
	 */
	public static void log(int severity, String message) {
		log(severity, message, null);
	}
}