| /* |
| * 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.apache.karaf.features.extension; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.UncheckedIOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.hooks.resolver.ResolverHook; |
| import org.osgi.framework.namespace.HostNamespace; |
| import org.osgi.framework.namespace.IdentityNamespace; |
| import org.osgi.framework.wiring.BundleCapability; |
| import org.osgi.framework.wiring.BundleRequirement; |
| import org.osgi.framework.wiring.BundleRevision; |
| import org.osgi.resource.Capability; |
| import org.osgi.resource.Resource; |
| |
| class StoredWiringResolver implements ResolverHook { |
| private final Map<Long, BundleWires> wiring = new HashMap<>(); |
| private Path path; |
| |
| StoredWiringResolver(Path path) { |
| this.path = path; |
| load(); |
| } |
| |
| void load() { |
| try { |
| Files.createDirectories(path); |
| Files.list(path).forEach(p -> { |
| String name = p.getFileName().toString(); |
| if (name.matches("[0-9]+")) { |
| try (BufferedReader reader = Files.newBufferedReader(p)) { |
| long id = Long.parseLong(name); |
| wiring.put(id, new BundleWires(reader)); |
| } catch (IOException e) { |
| throw new UncheckedIOException(e); |
| } |
| } |
| }); |
| } catch (IOException e) { |
| throw new UncheckedIOException(e); |
| } |
| } |
| |
| @Override |
| public void filterResolvable(Collection<BundleRevision> candidates) { |
| } |
| |
| @Override |
| public void filterSingletonCollisions(BundleCapability singleton, Collection<BundleCapability> collisionCandidates) { |
| } |
| |
| @Override |
| public void filterMatches(BundleRequirement requirement, Collection<BundleCapability> candidates) { |
| long sourceId = getBundleId(requirement); |
| wiring.get(sourceId).filterMatches(requirement, candidates); |
| } |
| |
| @Override |
| public void end() { |
| } |
| |
| private long getBundleId(BundleRequirement requirement) { |
| long sourceId = requirement.getRevision().getBundle().getBundleId(); |
| if (isFragment(requirement.getRevision()) |
| && !requirement.getNamespace().equals(HostNamespace.HOST_NAMESPACE)) { |
| sourceId = wiring.get(sourceId).getFragmentHost(); |
| } |
| return sourceId; |
| } |
| |
| private static boolean isFragment(Resource resource) { |
| for (Capability cap : resource.getCapabilities(null)) { |
| if (IdentityNamespace.IDENTITY_NAMESPACE.equals(cap.getNamespace())) { |
| return IdentityNamespace.TYPE_FRAGMENT.equals( |
| cap.getAttributes().get(IdentityNamespace.CAPABILITY_TYPE_ATTRIBUTE)); |
| } |
| } |
| return false; |
| } |
| |
| synchronized void update(Bundle bundle) { |
| BundleWires bw = new BundleWires(bundle); |
| bw.save(path); |
| wiring.put(bundle.getBundleId(), bw); |
| } |
| |
| synchronized void delete(Bundle bundle) { |
| wiring.get(bundle.getBundleId()).delete(path); |
| } |
| } |