| /******************************************************************************* |
| * Copyright (c) 2005 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.core.internal.runtime; |
| |
| import java.net.URL; |
| import java.util.*; |
| import org.eclipse.osgi.service.urlconversion.URLConverter; |
| import org.osgi.framework.*; |
| import org.osgi.util.tracker.ServiceTracker; |
| |
| /** |
| * The Common runtime plugin class. |
| * |
| * This class can only be used if OSGi plugin is available. |
| */ |
| public class Activator implements BundleActivator { |
| |
| /** |
| * Table to keep track of all the URL converter services. |
| */ |
| private static Map urlTrackers = new HashMap(); |
| |
| /** |
| * The bundle context associated this plug-in |
| */ |
| private static BundleContext bundleContext; |
| |
| /** |
| * This method is called upon plug-in activation |
| */ |
| public void start(BundleContext context) throws Exception { |
| bundleContext = context; |
| } |
| |
| /** |
| * This method is called when the plug-in is stopped |
| */ |
| public void stop(BundleContext context) throws Exception { |
| CommonOSGiUtils.getDefault().closeServices(); |
| closeURLTrackerServices(); |
| bundleContext = null; |
| } |
| |
| static BundleContext getContext() { |
| return bundleContext; |
| } |
| |
| /* |
| * Let go of all the services that we aquired and kept track of. |
| */ |
| private static void closeURLTrackerServices() { |
| synchronized (urlTrackers) { |
| if (!urlTrackers.isEmpty()) { |
| for (Iterator iter = urlTrackers.keySet().iterator(); iter.hasNext();) { |
| String key = (String) iter.next(); |
| ServiceTracker tracker = (ServiceTracker) urlTrackers.get(key); |
| tracker.close(); |
| } |
| urlTrackers = new HashMap(); |
| } |
| } |
| } |
| |
| /* |
| * Return the URL Converter for the given URL. Return null if we can't |
| * find one. |
| */ |
| public static URLConverter getURLConverter(URL url) { |
| String protocol = url.getProtocol(); |
| synchronized (urlTrackers) { |
| ServiceTracker tracker = (ServiceTracker) urlTrackers.get(protocol); |
| if (tracker == null) { |
| // get the right service based on the protocol |
| String FILTER_PREFIX = "(&(objectClass=" + URLConverter.class.getName() + ")(protocol="; //$NON-NLS-1$ //$NON-NLS-2$ |
| String FILTER_POSTFIX = "))"; //$NON-NLS-1$ |
| Filter filter = null; |
| try { |
| filter = getContext().createFilter(FILTER_PREFIX + protocol + FILTER_POSTFIX); |
| } catch (InvalidSyntaxException e) { |
| return null; |
| } |
| tracker = new ServiceTracker(getContext(), filter, null); |
| tracker.open(); |
| // cache it in the registry |
| urlTrackers.put(protocol, tracker); |
| } |
| return (URLConverter) tracker.getService(); |
| } |
| } |
| } |