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This bundle is the core implementation of the Karaf features support.
/*
* 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.internal.region;
import java.io.BufferedReader;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.felix.resolver.Logger;
import org.apache.felix.resolver.ResolverImpl;
import org.apache.felix.utils.repository.BaseRepository;
import org.apache.felix.utils.resource.RequirementImpl;
import org.apache.felix.utils.resource.ResourceBuilder;
import org.apache.felix.utils.resource.ResourceImpl;
import org.apache.felix.utils.resource.SimpleFilter;
import org.apache.karaf.util.json.JsonReader;
import org.osgi.framework.BundleException;
import org.osgi.resource.Capability;
import org.osgi.resource.Requirement;
import org.osgi.resource.Resource;
import org.osgi.resource.Wire;
import org.osgi.resource.Wiring;
import org.osgi.service.repository.Repository;
import org.osgi.service.resolver.HostedCapability;
import org.osgi.service.resolver.ResolveContext;
import org.osgi.service.resolver.Resolver;
import static org.osgi.framework.Constants.RESOLUTION_DIRECTIVE;
import static org.osgi.framework.Constants.RESOLUTION_OPTIONAL;
import static org.osgi.framework.namespace.IdentityNamespace.IDENTITY_NAMESPACE;
public class OfflineResolver {
public static void main(String[] args) throws Exception {
if (args == null || args.length != 1) {
throw new IllegalArgumentException("File path expected");
}
resolve(args[0]);
}
public static void resolve(String resolutionFile) throws Exception {
Map resolution;
try (BufferedReader reader = Files.newBufferedReader(Paths.get(resolutionFile), StandardCharsets.UTF_8)) {
resolution = (Map) JsonReader.read(reader);
}
final Repository globalRepository;
if (resolution.containsKey("globalRepository")) {
globalRepository = readRepository(resolution.get("globalRepository"));
} else {
globalRepository = null;
}
final Repository repository = readRepository(resolution.get("repository"));
Resolver resolver = new ResolverImpl(new Logger(Logger.LOG_ERROR));
Map> wiring = resolver.resolve(new ResolveContext() {
private final CandidateComparator candidateComparator = new CandidateComparator(r -> 0);
@Override
public Collection getMandatoryResources() {
List resources = new ArrayList<>();
Requirement req = new RequirementImpl(
null,
IDENTITY_NAMESPACE,
Collections.emptyMap(),
Collections.emptyMap(),
SimpleFilter.parse("(" + IDENTITY_NAMESPACE + "=root)"));
Collection identities = repository.findProviders(Collections.singleton(req)).get(req);
for (Capability identity : identities) {
resources.add(identity.getResource());
}
return resources;
}
@Override
public List findProviders(Requirement requirement) {
List caps = new ArrayList<>();
Map> resMap =
repository.findProviders(Collections.singleton(requirement));
Collection res = resMap != null ? resMap.get(requirement) : null;
if (res != null && !res.isEmpty()) {
caps.addAll(res);
} else if (globalRepository != null) {
// Only bring in external resources for non optional requirements
if (!RESOLUTION_OPTIONAL.equals(requirement.getDirectives().get(RESOLUTION_DIRECTIVE))) {
resMap = globalRepository.findProviders(Collections.singleton(requirement));
res = resMap != null ? resMap.get(requirement) : null;
if (res != null && !res.isEmpty()) {
caps.addAll(res);
}
}
}
// Sort caps
caps.sort(candidateComparator);
return caps;
}
@Override
public int insertHostedCapability(List capabilities, HostedCapability hostedCapability) {
int idx = Collections.binarySearch(capabilities, hostedCapability, candidateComparator);
if (idx < 0) {
idx = Math.abs(idx + 1);
}
capabilities.add(idx, hostedCapability);
return idx;
}
@Override
public boolean isEffective(Requirement requirement) {
return true;
}
@Override
public Map getWirings() {
return Collections.emptyMap();
}
});
}
private static Repository readRepository(Object repository) throws BundleException {
List resources = new ArrayList<>();
Collection