| /* |
| * 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.felix.framework; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.felix.framework.StatefulResolver.ResolverHookRecord; |
| import org.apache.felix.framework.resolver.CandidateComparator; |
| import org.apache.felix.framework.util.Util; |
| import org.osgi.framework.namespace.HostNamespace; |
| import org.osgi.framework.namespace.PackageNamespace; |
| 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.Requirement; |
| import org.osgi.resource.Resource; |
| import org.osgi.resource.Wire; |
| import org.osgi.resource.Wiring; |
| import org.osgi.service.resolver.HostedCapability; |
| import org.osgi.service.resolver.ResolveContext; |
| |
| /** |
| * |
| */ |
| public class ResolveContextImpl extends ResolveContext |
| { |
| private final StatefulResolver m_state; |
| private final Map<Resource, Wiring> m_wirings; |
| private final ResolverHookRecord m_resolverHookrecord; |
| private final Collection<BundleRevision> m_mandatory; |
| private final Collection<BundleRevision> m_optional; |
| private final Collection<BundleRevision> m_ondemand; |
| |
| ResolveContextImpl( |
| StatefulResolver state, Map<Resource, Wiring> wirings, |
| ResolverHookRecord resolverHookRecord, Collection<BundleRevision> mandatory, |
| Collection<BundleRevision> optional, Collection<BundleRevision> ondemand) |
| { |
| m_state = state; |
| m_wirings = wirings; |
| m_resolverHookrecord = resolverHookRecord; |
| m_mandatory = mandatory; |
| m_optional = optional; |
| m_ondemand = ondemand; |
| } |
| |
| @Override |
| public Collection<Resource> getMandatoryResources() |
| { |
| return new ArrayList<Resource>(m_mandatory); |
| } |
| |
| @Override |
| public Collection<Resource> getOptionalResources() |
| { |
| return new ArrayList<Resource>(m_optional); |
| } |
| |
| public Collection<Resource> getOndemandResources(Resource host) |
| { |
| List<Resource> result = new ArrayList<Resource>(); |
| for (BundleRevision revision : m_ondemand) |
| { |
| for (BundleRequirement req : revision.getDeclaredRequirements(null)) |
| { |
| if (req.getNamespace().equals(BundleRevision.HOST_NAMESPACE)) |
| { |
| for (Capability cap : host.getCapabilities(null)) |
| { |
| if (cap.getNamespace().equals(BundleRevision.HOST_NAMESPACE)) |
| { |
| if (req.matches((BundleCapability) cap)) |
| { |
| result.add(revision); |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| public List<Capability> findProviders(Requirement br) |
| { |
| if (!(br instanceof BundleRequirement)) |
| throw new IllegalStateException("Expected a BundleRequirement"); |
| |
| List<BundleCapability> result = m_state.findProvidersInternal( |
| m_resolverHookrecord, br, true, true); |
| |
| // Casting the result to a List of Capability. |
| // TODO Can we do this without the strange double-cast? |
| @SuppressWarnings("unchecked") |
| List<Capability> caps = |
| (List<Capability>) (List<? extends Capability>) result; |
| return caps; |
| } |
| |
| @Override |
| public int insertHostedCapability(List<Capability> caps, HostedCapability hc) |
| { |
| int idx = Collections.binarySearch(caps, hc, new CandidateComparator()); |
| if (idx < 0) |
| { |
| idx = Math.abs(idx + 1); |
| } |
| caps.add(idx, hc); |
| return idx; |
| } |
| |
| @Override |
| public boolean isEffective(Requirement br) |
| { |
| return m_state.isEffective(br); |
| } |
| |
| @Override |
| public Map<Resource, Wiring> getWirings() |
| { |
| return m_wirings; |
| } |
| |
| @Override |
| public List<Wire> getSubstitutionWires(Wiring wiring) { |
| // TODO: this is calculating information that probably has been calculated |
| // already or at least could be calculated quicker taking into account the |
| // current state. We need to revisit this. |
| Set<String> exportNames = new HashSet<String>(); |
| for (Capability cap : wiring.getResource().getCapabilities(null)) |
| { |
| if (cap.getNamespace().equals(PackageNamespace.PACKAGE_NAMESPACE)) |
| { |
| exportNames.add( |
| (String) cap.getAttributes().get(PackageNamespace.PACKAGE_NAMESPACE)); |
| } |
| } |
| // Add fragment exports |
| for (Wire wire : wiring.getProvidedResourceWires(HostNamespace.HOST_NAMESPACE)) |
| { |
| for (Capability cap : wire.getRequirement().getResource().getCapabilities(null)) |
| { |
| if (cap.getNamespace().equals(PackageNamespace.PACKAGE_NAMESPACE)) |
| { |
| exportNames.add((String) cap.getAttributes().get( |
| PackageNamespace.PACKAGE_NAMESPACE)); |
| } |
| } |
| } |
| List<Wire> substitutionWires = new ArrayList<Wire>(); |
| for (Wire wire : wiring.getRequiredResourceWires(null)) |
| { |
| if (wire.getCapability().getNamespace().equals(PackageNamespace.PACKAGE_NAMESPACE)) |
| { |
| if (exportNames.contains(wire.getCapability().getAttributes().get(PackageNamespace.PACKAGE_NAMESPACE))) |
| { |
| substitutionWires.add(wire); |
| } |
| } |
| } |
| return substitutionWires; |
| } |
| |
| @Override |
| public Collection<Resource> findRelatedResources(Resource resource) { |
| return !Util.isFragment(resource) ? getOndemandResources(resource) : Collections.<Resource>emptyList(); |
| } |
| |
| @Override |
| public void onCancel(Runnable callback) { |
| // TODO: implement session cancel |
| super.onCancel(callback); |
| } |
| } |