| /******************************************************************************* |
| * Copyright (c) 2005, 2008 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.osgi.internal.loader.buddy; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import org.eclipse.osgi.internal.loader.BundleLoader; |
| import org.osgi.service.packageadmin.ExportedPackage; |
| import org.osgi.service.packageadmin.PackageAdmin; |
| |
| /** |
| * Global policy is an implementation of a buddy policy. It is responsible |
| * for looking up a class within the global set of exported classes. If multiple |
| * version of the same package are exported in the system, the exported package |
| * with the highest version will be returned. |
| */ |
| public class GlobalPolicy implements IBuddyPolicy { |
| private PackageAdmin admin; |
| |
| public GlobalPolicy(PackageAdmin admin) { |
| this.admin = admin; |
| } |
| |
| public Class loadClass(String name) { |
| ExportedPackage pkg = admin.getExportedPackage(BundleLoader.getPackageName(name)); |
| if (pkg == null) |
| return null; |
| try { |
| return pkg.getExportingBundle().loadClass(name); |
| } catch (ClassNotFoundException e) { |
| return null; |
| } |
| } |
| |
| public URL loadResource(String name) { |
| //get all exported packages that match the resource's package |
| ExportedPackage pkg = admin.getExportedPackage(BundleLoader.getResourcePackageName(name)); |
| if (pkg == null) |
| return null; |
| return pkg.getExportingBundle().getResource(name); |
| } |
| |
| public Enumeration loadResources(String name) { |
| //get all exported packages that match the resource's package |
| ExportedPackage[] pkgs = admin.getExportedPackages(BundleLoader.getResourcePackageName(name)); |
| if (pkgs == null || pkgs.length == 0) |
| return null; |
| |
| //get all matching resources for each package |
| Enumeration results = null; |
| for (int i = 0; i < pkgs.length; i++) { |
| try { |
| results = BundleLoader.compoundEnumerations(results, pkgs[i].getExportingBundle().getResources(name)); |
| } catch (IOException e) { |
| //ignore IO problems and try next package |
| } |
| } |
| |
| return results; |
| } |
| } |