UIPlugin.java

/*******************************************************************************
 * Copyright (c) 2014, 2015 Wind River Systems, Inc.
 * 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:
 *    Markus Schorn - initial API and implementation
 *******************************************************************************/
package org.eclipse.tcf.te.tcf.remote.ui.activator;

import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

/**
 * The activator class controls the plug-in life cycle
 */
public class UIPlugin extends AbstractUIPlugin {
	private static final String PLUGIN_ID = "org.eclipse.tcf.te.tcf.remote.ui"; //$NON-NLS-1$

	// The shared instance
	private static UIPlugin plugin;

	/**
	 * The constructor
	 */
	public UIPlugin() {
	}

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

	/**
	 * Convenience method which returns the unique identifier of this plugin.
	 */
	public static String getUniqueIdentifier() {
		return PLUGIN_ID;
	}

	@Override
    public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
	}

	@Override
    public void stop(BundleContext context) throws Exception {
		plugin = null;
		super.stop(context);
	}

	public static <T> T getService(Class<T> service) {
		if (plugin == null)
			return null;
		BundleContext context = plugin.getBundle().getBundleContext();
		ServiceReference<T> ref = context.getServiceReference(service);
		return ref != null ? context.getService(ref) : null;
	}
}