bundles/org.eclipse.ui.net/src/org/eclipse/ui/internal/net/Activator.java

/*******************************************************************************
 * Copyright (c) 2007 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
 * -------- -------- -----------------------------------------------------------
 * 20070201   154100 pmoogk@ca.ibm.com - Peter Moogk, Port internet code from WTP to Eclipse base.
 *******************************************************************************/
package org.eclipse.ui.internal.net;

import org.eclipse.core.net.proxy.IProxyService;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;

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

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.ui.net"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;

	private ServiceTracker tracker;

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

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

	/**
	 * Return the {@link IProxyService} or <code>null</code> if the service is
	 * not available.
	 * 
	 * @return the {@link IProxyService} or <code>null</code>
	 */
	public IProxyService getProxyService() {
		return (IProxyService) tracker.getService();
	}

	public void start(BundleContext context) throws Exception {
		super.start(context);
		tracker = new ServiceTracker(getBundle().getBundleContext(),
				IProxyService.class.getName(), null);
		tracker.open();
	}

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