/*
* 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.
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package org.apache.aries.subsystem.core.capabilityset;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.apache.aries.subsystem.core.repository.Repository;
import org.osgi.framework.namespace.BundleNamespace;
import org.osgi.framework.namespace.ExecutionEnvironmentNamespace;
import org.osgi.framework.namespace.HostNamespace;
import org.osgi.framework.namespace.IdentityNamespace;
import org.osgi.framework.namespace.NativeNamespace;
import org.osgi.framework.namespace.PackageNamespace;
import org.osgi.namespace.service.ServiceNamespace;
import org.osgi.resource.Capability;
import org.osgi.resource.Namespace;
import org.osgi.resource.Requirement;
import org.osgi.resource.Resource;
public class CapabilitySetRepository implements Repository {
private final Map<String, CapabilitySet> namespace2capabilitySet;
public CapabilitySetRepository() {
namespace2capabilitySet = Collections.synchronizedMap(new HashMap<String, CapabilitySet>());
namespace2capabilitySet.put(
IdentityNamespace.IDENTITY_NAMESPACE,
new CapabilitySet(Arrays.asList(IdentityNamespace.IDENTITY_NAMESPACE), true));
namespace2capabilitySet.put(
NativeNamespace.NATIVE_NAMESPACE,
new CapabilitySet(Arrays.asList(NativeNamespace.NATIVE_NAMESPACE), true));
namespace2capabilitySet.put(
ExecutionEnvironmentNamespace.EXECUTION_ENVIRONMENT_NAMESPACE,
new CapabilitySet(Arrays.asList(ExecutionEnvironmentNamespace.EXECUTION_ENVIRONMENT_NAMESPACE), true));
namespace2capabilitySet.put(
BundleNamespace.BUNDLE_NAMESPACE,
new CapabilitySet(Arrays.asList(BundleNamespace.BUNDLE_NAMESPACE), true));
namespace2capabilitySet.put(
HostNamespace.HOST_NAMESPACE,
new CapabilitySet(Arrays.asList(HostNamespace.HOST_NAMESPACE), true));
namespace2capabilitySet.put(
PackageNamespace.PACKAGE_NAMESPACE,
new CapabilitySet(Arrays.asList(PackageNamespace.PACKAGE_NAMESPACE), true));
namespace2capabilitySet.put(
ServiceNamespace.SERVICE_NAMESPACE,
new CapabilitySet(Arrays.asList(ServiceNamespace.CAPABILITY_OBJECTCLASS_ATTRIBUTE), true));
}
public void addResource(Resource resource) {
for (Capability capability : resource.getCapabilities(null)) {
String namespace = capability.getNamespace();
CapabilitySet capabilitySet;
synchronized (namespace2capabilitySet) {
capabilitySet = namespace2capabilitySet.get(namespace);
if (capabilitySet == null) {
capabilitySet = new CapabilitySet(Arrays.asList(namespace), true);
namespace2capabilitySet.put(namespace, capabilitySet);
}
}
// TODO Examine CapabilitySet for thread safety.
capabilitySet.addCapability(capability);
}
}
@Override
public Map<Requirement, Collection<Capability>> findProviders(Collection<? extends Requirement> requirements) {
Map<Requirement, Collection<Capability>> result = new HashMap<Requirement, Collection<Capability>>(requirements.size());
for (Requirement requirement : requirements) {
String filterDirective = requirement.getDirectives().get(Namespace.REQUIREMENT_FILTER_DIRECTIVE);
SimpleFilter simpleFilter;
if (filterDirective == null) {
simpleFilter = new SimpleFilter(null, null, SimpleFilter.MATCH_ALL);
}
else {
simpleFilter = SimpleFilter.parse(filterDirective);
}
String namespace = requirement.getNamespace();
CapabilitySet capabilitySet = namespace2capabilitySet.get(namespace);
if (capabilitySet != null) {
Set<Capability> capabilities = capabilitySet.match(
simpleFilter,
PackageNamespace.PACKAGE_NAMESPACE.equals(namespace)
|| BundleNamespace.BUNDLE_NAMESPACE.equals(namespace)
|| HostNamespace.HOST_NAMESPACE.equals(namespace));
result.put(requirement, capabilities);
}
else {
result.put(requirement, Collections.<Capability>emptyList());
}
}
return result;
}
public void removeResource(Resource resource) {
for (Capability capability : resource.getCapabilities(null)) {
CapabilitySet capabilitySet = namespace2capabilitySet.get(capability.getNamespace());
if (capabilitySet == null) {
continue;
}
// TODO Examine CapabilitySet for thread safety.
capabilitySet.removeCapability(capability);
}
}
}