Activator.java

/*******************************************************************************
 * Copyright (c) 2013 INRIA.
 * 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:
 * Juan David Villa Calle - initial API and implementation
 *******************************************************************************/
package fr.inria.atlanmod.emfviews.ui.linkingview;

import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Bundle;

import java.net.URL;

/**
 * The activator class controls the plug-in life cycle
 */
public class Activator extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "fr.inria.atlanmod.emfviews.ui.linkingview"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;
	
	/**
	 * The constructor
	 */
	public Activator() {
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		plugin = null;
		super.stop(context);
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public static Activator getDefault() {
		return plugin;
	}
	
	public static URL getInstallURL()
	{
		Bundle bundle = Platform.getBundle(Activator.PLUGIN_ID);
		if(bundle != null) {
			return bundle.getEntry("/");
		} else
			return null;
	}
	
	public static ImageDescriptor getImage(String relativePath)
	{
		URL url = getInstallURL();
		ImageDescriptor descriptor= null;
		try {
			descriptor = ImageDescriptor.createFromURL(new URL(url, relativePath));
		} catch (Exception e) {
			descriptor= ImageDescriptor.getMissingImageDescriptor();
		}
		return descriptor;
	}

}