/*******************************************************************************
 * 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
 *******************************************************************************/
package org.eclipse.e4.languages.javascript.debug.connect.test;

import org.eclipse.e4.languages.javascript.JSBundle;
import org.osgi.framework.*;
import org.osgi.service.packageadmin.PackageAdmin;

public class Activator implements BundleActivator {

	private static PackageAdmin packageAdmin;
	private static BundleContext bundleContext;
	private ServiceReference packageAdminRef;

	public void start(BundleContext context) throws Exception {
		packageAdminRef = context.getServiceReference(PackageAdmin.class.getName());
		setPackageAdmin((PackageAdmin) context.getService(packageAdminRef));
		setBundleContext(context);
	}

	public void stop(BundleContext context) throws Exception {
		setBundleContext(null);
		setPackageAdmin(null);
		context.ungetService(packageAdminRef);
	}

	private static synchronized void setBundleContext(BundleContext context) {
		bundleContext = context;
	}

	private static synchronized void setPackageAdmin(PackageAdmin service) {
		packageAdmin = service;
	}

	static synchronized BundleContext getBundleContext() {
		return bundleContext;
	}

	static synchronized Bundle getBundle(String symbolicName) {
		if (packageAdmin == null)
			return null;

		Bundle[] bundles = packageAdmin.getBundles(symbolicName, null);
		if (bundles == null)
			return null;
		//Return the first bundle that is not installed or uninstalled
		for (int i = 0; i < bundles.length; i++) {
			if ((bundles[i].getState() & (Bundle.INSTALLED | Bundle.UNINSTALLED)) == 0) {
				return bundles[i];
			}
		}
		return null;
	}

	public static JSBundle getJSBundle() {
		return org.eclipse.e4.internal.languages.javascript.Activator.getJSBundle(getBundleContext().getBundle());
	}
}