/*
* 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.repository;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.karaf.features.internal.resolver.CapabilitySet;
import org.apache.karaf.features.internal.resolver.RequirementImpl;
import org.apache.karaf.features.internal.resolver.SimpleFilter;
import org.osgi.framework.Constants;
import org.osgi.resource.Capability;
import org.osgi.resource.Requirement;
import org.osgi.resource.Resource;
import org.osgi.service.repository.Repository;
/**
*/
public class BaseRepository implements Repository {
protected final List<Resource> resources;
protected final Map<String, CapabilitySet> capSets;
public BaseRepository() {
this.resources = new ArrayList<Resource>();
this.capSets = new HashMap<String, CapabilitySet>();
}
public BaseRepository(Collection<Resource> resources) {
this();
for (Resource resource : resources) {
addResource(resource);
}
}
protected void addResource(Resource resource) {
for (Capability cap : resource.getCapabilities(null)) {
String ns = cap.getNamespace();
CapabilitySet set = capSets.get(ns);
if (set == null) {
set = new CapabilitySet(Collections.singletonList(ns));
capSets.put(ns, set);
}
set.addCapability(cap);
}
resources.add(resource);
}
public List<Resource> getResources() {
return resources;
}
@Override
public Map<Requirement, Collection<Capability>> findProviders(Collection<? extends Requirement> requirements) {
Map<Requirement, Collection<Capability>> result = new HashMap<Requirement, Collection<Capability>>();
for (Requirement requirement : requirements) {
CapabilitySet set = capSets.get(requirement.getNamespace());
if (set != null) {
SimpleFilter sf;
if (requirement instanceof RequirementImpl) {
sf = ((RequirementImpl) requirement).getFilter();
} else {
String filter = requirement.getDirectives().get(Constants.FILTER_DIRECTIVE);
sf = (filter != null)
? SimpleFilter.parse(filter)
: new SimpleFilter(null, null, SimpleFilter.MATCH_ALL);
}
result.put(requirement, set.match(sf, true));
} else {
result.put(requirement, Collections.<Capability>emptyList());
}
}
return result;
}
}