| /******************************************************************************* |
| * Copyright (c) 2009, 2010 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.core.di.internal.extensions; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import org.eclipse.core.runtime.preferences.IPreferencesService; |
| import org.osgi.framework.BundleActivator; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.service.event.EventAdmin; |
| import org.osgi.util.tracker.ServiceTracker; |
| |
| public class DIEActivator implements BundleActivator { |
| |
| static private DIEActivator defaultInstance; |
| |
| private BundleContext bundleContext; |
| |
| private ServiceTracker<IPreferencesService, IPreferencesService> preferencesTracker; |
| private ServiceTracker<EventAdmin, EventAdmin> eventAdminTracker; |
| |
| private Set<PreferencesObjectSupplier> preferenceSuppliers = new HashSet<PreferencesObjectSupplier>(); |
| |
| public DIEActivator() { |
| defaultInstance = this; |
| } |
| |
| public static DIEActivator getDefault() { |
| return defaultInstance; |
| } |
| |
| public void start(BundleContext context) throws Exception { |
| bundleContext = context; |
| } |
| |
| public void stop(BundleContext context) throws Exception { |
| for (PreferencesObjectSupplier supplier : preferenceSuppliers) { |
| supplier.removeAllListeners(); |
| } |
| preferenceSuppliers.clear(); |
| |
| if (preferencesTracker != null) { |
| preferencesTracker.close(); |
| preferencesTracker = null; |
| } |
| if (eventAdminTracker != null) { |
| eventAdminTracker.close(); |
| eventAdminTracker = null; |
| } |
| bundleContext = null; |
| } |
| |
| public BundleContext getBundleContext() { |
| return bundleContext; |
| } |
| |
| public IPreferencesService getPreferencesService() { |
| if (preferencesTracker == null) { |
| if (bundleContext == null) |
| return null; |
| preferencesTracker = new ServiceTracker<IPreferencesService, IPreferencesService>(bundleContext, IPreferencesService.class, null); |
| preferencesTracker.open(); |
| } |
| return preferencesTracker.getService(); |
| } |
| |
| public EventAdmin getEventAdmin() { |
| if (eventAdminTracker == null) { |
| if (bundleContext == null) |
| return null; |
| eventAdminTracker = new ServiceTracker<EventAdmin, EventAdmin>(bundleContext, EventAdmin.class, null); |
| eventAdminTracker.open(); |
| } |
| return eventAdminTracker.getService(); |
| } |
| |
| public void registerPreferencesSupplier(PreferencesObjectSupplier supplier) { |
| preferenceSuppliers.add(supplier); |
| } |
| |
| } |