/*
* Licensed 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.aries.subsystem.core.internal;
import java.util.Collection;
import java.util.HashSet;
import org.osgi.framework.Version;
import org.osgi.service.subsystem.Subsystem;
public class TargetRegion {
Collection<Subsystem> region = new HashSet<Subsystem>();
public TargetRegion(BasicSubsystem subsystem) {
// Find the scoped subsystem that controls the region.
while (!subsystem.isScoped()) {
subsystem = (BasicSubsystem) subsystem.getParents().iterator().next();
}
// All children of the scoped subsystem controlling the region are
// part of the target region, even those that are scoped subsystems.
add(subsystem.getChildren());
}
public boolean contains(Subsystem subsystem) {
return find(subsystem.getSymbolicName(), subsystem.getVersion()) != null;
}
public Subsystem find(String symbolicName, Version version) {
for (Subsystem s : region) {
if (s.getSymbolicName().equals(symbolicName)
&& s.getVersion().equals(version))
return s;
}
return null;
}
private void add(Collection<Subsystem> children) {
for (Subsystem child : children) {
region.add(child);
if (((BasicSubsystem) child).isScoped()) {
// Children of scoped children are not part of the target region.
continue;
}
// Children of unscoped children are part of the target region.
add(child.getChildren());
}
}
}