| /* |
| * 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 static java.nio.file.StandardOpenOption.CREATE; |
| import static java.nio.file.StandardOpenOption.TRUNCATE_EXISTING; |
| import static java.nio.file.StandardOpenOption.WRITE; |
| |
| import java.io.BufferedReader; |
| import java.io.BufferedWriter; |
| 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.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.namespace.HostNamespace; |
| import org.osgi.framework.wiring.BundleCapability; |
| import org.osgi.framework.wiring.BundleRequirement; |
| import org.osgi.framework.wiring.BundleWire; |
| import org.osgi.framework.wiring.BundleWiring; |
| import org.osgi.resource.Namespace; |
| import org.osgi.resource.Requirement; |
| |
| class BundleWires { |
| long bundleId; |
| Map<String, Set<String>> wiring = new HashMap<>(); |
| |
| BundleWires(Bundle bundle) { |
| this.bundleId = bundle.getBundleId(); |
| for (BundleWire wire : bundle.adapt(BundleWiring.class).getRequiredWires(null)) { |
| String requirementId = getRequirementId(wire.getRequirement()); |
| String capabilityId = getCapabilityId(wire.getCapability()); |
| |
| Set<String> capabilityIds = this.wiring.computeIfAbsent( requirementId, key -> new HashSet<>() ); |
| capabilityIds.add(capabilityId); |
| } |
| } |
| |
| BundleWires(long bundleId, BufferedReader reader) throws IOException { |
| this.bundleId = bundleId; |
| while (true) { |
| String key = reader.readLine(); |
| String val = reader.readLine(); |
| if (key != null && val != null) { |
| Set<String> capabilityIds = this.wiring.computeIfAbsent( key, k -> new HashSet<>() ); |
| capabilityIds.add(val); |
| } else { |
| break; |
| } |
| } |
| } |
| |
| void save(Path path) { |
| try { |
| Files.createDirectories(path); |
| Path file = path.resolve(Long.toString(this.bundleId)); |
| Files.createDirectories(file.getParent()); |
| try (BufferedWriter fw = Files.newBufferedWriter(file, TRUNCATE_EXISTING, WRITE, CREATE)) { |
| for (Map.Entry<String, Set<String>> wires : wiring.entrySet()) { |
| String requirementId = wires.getKey(); |
| Set<String> capabilityIds = wires.getValue(); |
| |
| for ( String capabilityId : capabilityIds ) { |
| fw.append( requirementId ).append( '\n' ); |
| fw.append( capabilityId ).append( '\n' ); |
| } |
| } |
| } |
| } catch (IOException e) { |
| throw new UncheckedIOException(e); |
| } |
| } |
| |
| void delete(Path path) { |
| try { |
| Files.createDirectories(path); |
| Path file = path.resolve(Long.toString(this.bundleId)); |
| Files.deleteIfExists(file); |
| } catch (IOException e) { |
| throw new UncheckedIOException(e); |
| } |
| } |
| |
| long[] getFragmentHosts() { |
| return wiring.entrySet().stream() // |
| .filter(e -> e.getKey().startsWith(HostNamespace.HOST_NAMESPACE)) // |
| .map(Map.Entry::getValue) // |
| .flatMap( Set::stream ) // |
| .mapToLong(this::getBundleId).toArray(); |
| } |
| |
| private long getBundleId(String value) { |
| int idx = value.indexOf(';'); |
| if (idx > 0) { |
| value = value.substring(0, idx); |
| } |
| return Long.parseLong(value.trim()); |
| } |
| |
| Set<BundleCapability> filterCandidates( BundleRequirement requirement, Collection<BundleCapability> candidates) { |
| Set<String> wiredCapabilityIds = wiring.get(getRequirementId(requirement)); |
| |
| return candidates.stream() // |
| .filter( capability -> isCapabilityWiredToBundle( wiredCapabilityIds, capability ) ) // |
| .collect( Collectors.toSet() ); |
| } |
| |
| private boolean isCapabilityWiredToBundle( Set<String> capabilityIds, BundleCapability capability) { |
| return |
| // is this bundle wired to the candidate capability? |
| (capabilityIds != null && capabilityIds.contains(getCapabilityId(capability))) |
| // if not and the bundle has no wirings to the capability check if itself satisfies it |
| || (capabilityIds == null && capability.getRevision().getBundle().getBundleId() == this.bundleId); |
| } |
| |
| private String getRequirementId(Requirement requirement) { |
| String filter = requirement.getDirectives().get(Namespace.REQUIREMENT_FILTER_DIRECTIVE); |
| if (filter != null) { |
| return requirement.getNamespace() + "; " + filter; |
| } else { |
| return requirement.getNamespace(); |
| } |
| } |
| |
| private String getCapabilityId(BundleCapability capability) { |
| StringBuilder sb = new StringBuilder(64); |
| sb.append(capability.getRevision().getBundle().getBundleId()); |
| Object v = capability.getAttributes().get(Constants.VERSION_ATTRIBUTE); |
| if (v != null) { |
| sb.append("; version=").append(v.toString()); |
| } |
| return sb.toString(); |
| } |
| } |