| /******************************************************************************* |
| * Copyright (c) 2005, 2009 Cognos Incorporated, 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: |
| * Cognos Incorporated - initial API and implementation |
| * IBM Corporation - bug fixes and enhancements |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.jsp.jasper; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleActivator; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.service.packageadmin.ExportedPackage; |
| import org.osgi.service.packageadmin.PackageAdmin; |
| import org.osgi.util.tracker.ServiceTracker; |
| import org.osgi.util.tracker.ServiceTrackerCustomizer; |
| |
| public class Activator implements BundleActivator, ServiceTrackerCustomizer { |
| |
| private ServiceTracker packageAdminTracker; |
| private static PackageAdmin packageAdmin; |
| private volatile static Bundle thisBundle; |
| private BundleContext context; |
| |
| public void start(BundleContext context) throws Exception { |
| this.context = context; |
| thisBundle = context.getBundle(); |
| packageAdminTracker = new ServiceTracker(context, PackageAdmin.class.getName(), this); |
| packageAdminTracker.open(); |
| } |
| |
| public void stop(BundleContext context) throws Exception { |
| packageAdminTracker.close(); |
| packageAdminTracker = null; |
| thisBundle = null; |
| this.context = null; |
| } |
| |
| public Object addingService(ServiceReference reference) { |
| synchronized (Activator.class) { |
| packageAdmin = (PackageAdmin) context.getService(reference); |
| } |
| return packageAdmin; |
| } |
| |
| public void modifiedService(ServiceReference reference, Object service) { |
| } |
| |
| public void removedService(ServiceReference reference, Object service) { |
| synchronized (Activator.class) { |
| context.ungetService(reference); |
| packageAdmin = null; |
| } |
| } |
| |
| public static synchronized Bundle getBundle(Class clazz) { |
| if (packageAdmin == null) |
| throw new IllegalStateException("Not started"); //$NON-NLS-1$ |
| |
| return packageAdmin.getBundle(clazz); |
| } |
| |
| public static Bundle[] getFragments(Bundle bundle) { |
| if (packageAdmin == null) |
| throw new IllegalStateException("Not started"); //$NON-NLS-1$ |
| |
| return packageAdmin.getFragments(bundle); |
| } |
| |
| public static Bundle getJasperBundle() { |
| Bundle bundle = getBundle(org.apache.jasper.servlet.JspServlet.class); |
| if (bundle != null) |
| return bundle; |
| |
| if (thisBundle == null) |
| throw new IllegalStateException("Not started"); //$NON-NLS-1$ |
| |
| ExportedPackage[] exportedPackages = packageAdmin.getExportedPackages("org.apache.jasper.servlet"); //$NON-NLS-1$ |
| for (int i = 0; i < exportedPackages.length; i++) { |
| Bundle[] importingBundles = exportedPackages[i].getImportingBundles(); |
| for (int j = 0; j < importingBundles.length; j++) { |
| if (thisBundle.equals(importingBundles[j])) |
| return exportedPackages[i].getExportingBundle(); |
| } |
| } |
| return null; |
| } |
| } |