/*
* 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.Comparator;
import org.apache.aries.subsystem.core.archive.SubsystemContentHeader;
import org.osgi.resource.Resource;
public class StartResourceComparator implements Comparator<Resource> {
private final SubsystemContentHeader header;
public StartResourceComparator(SubsystemContentHeader header) {
this.header = header;
}
@Override
public int compare(Resource r1, Resource r2) {
Integer r1StartOrder = getStartOrder(r1);
Integer r2StartOrder = getStartOrder(r2);
return r1StartOrder.compareTo(r2StartOrder);
}
private Integer getStartOrder(Resource r) {
SubsystemContentHeader.Clause clause = header.getClause(r);
if (clause == null)
return -1;
return clause.getStartOrder();
}
}