| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.netbeans.core.osgi; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.Set; |
| import org.openide.util.Enumerations; |
| import org.openide.util.NbCollections; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| |
| /** |
| * Delegates to all loaded bundles, or one bundle only. |
| */ |
| class OSGiClassLoader extends ClassLoader { |
| |
| private final BundleContext context; |
| private final Set<? extends Bundle> loadedBundles; |
| private final Bundle bundle; |
| |
| public OSGiClassLoader(BundleContext context, Set<? extends Bundle> loadedBundles) { |
| super(ClassLoader.getSystemClassLoader().getParent()); |
| this.context = context; |
| this.loadedBundles = loadedBundles; |
| bundle = null; |
| } |
| |
| public OSGiClassLoader(Bundle bundle) { |
| super(ClassLoader.getSystemClassLoader().getParent()); |
| context = null; |
| loadedBundles = null; |
| this.bundle = bundle; |
| } |
| |
| private Iterable<Bundle> bundles() { |
| if (context != null) { |
| Bundle[] bundles; |
| try { |
| bundles = context.getBundles(); |
| } catch (IllegalStateException x) { |
| // Thrown sometimes by Felix during shutdown. Not clear how to avoid this. |
| return Collections.emptySet(); |
| } |
| // Sort framework last so since in Felix 4 its loadClass will search app classpath, causing test failures. |
| // (Tried to disable this using various framework config properties without success.) |
| return NbCollections.iterable(Enumerations.concat(Enumerations.filter(Enumerations.array(bundles), new Enumerations.Processor<Bundle,Bundle>() { |
| public @Override Bundle process(Bundle b, Collection<Bundle> c) { |
| if (b.getBundleId() == 0) { |
| return null; |
| } |
| if (b.getState() == Bundle.INSTALLED) { |
| return null; |
| } |
| if (!loadedBundles.contains(b)) { |
| return null; |
| } |
| return b; |
| } |
| }), Enumerations.singleton(context.getBundle(0)))); |
| } else { |
| return Collections.singleton(bundle); |
| } |
| } |
| |
| protected @Override Class<?> findClass(String name) throws ClassNotFoundException { |
| for (Bundle b : bundles()) { |
| try { |
| return b.loadClass(name); |
| } catch (ClassNotFoundException x) { |
| // normal, try next one |
| } |
| } |
| return super.findClass(name); |
| } |
| |
| protected @Override URL findResource(String name) { |
| for (Bundle b : bundles()) { |
| URL resource = b.getResource(name); |
| if (resource != null) { |
| return resource; |
| } |
| } |
| return super.findResource(name); |
| } |
| |
| protected @Override Enumeration<URL> findResources(String name) throws IOException { |
| List<Enumeration<URL>> resourcess = new ArrayList<Enumeration<URL>>(); |
| for (Bundle b : bundles()) { |
| Enumeration<?> resourcesRaw = b.getResources(name); |
| if (resourcesRaw == null) { |
| // Oddly, this is permitted. |
| continue; |
| } |
| Enumeration<URL> resources = NbCollections.checkedEnumerationByFilter(resourcesRaw, URL.class, true); |
| if (resources != null) { |
| resourcess.add(resources); |
| } |
| } |
| return Enumerations.concat(Collections.enumeration(resourcess)); |
| } |
| |
| public @Override String toString() { |
| if (context != null) { |
| return "OSGiClassLoader[all bundles]"; // NOI18N |
| } else { |
| return "OSGiClassLoader[" + bundle.getSymbolicName() + "]"; // NOI18N |
| } |
| } |
| |
| } |