/*
* Copyright 2010 JBoss Inc
*
* 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.optaplanner.examples.pas.domain.solver;
import java.io.Serializable;
import java.util.Comparator;
import org.apache.commons.lang.builder.CompareToBuilder;
import org.optaplanner.examples.pas.domain.Bed;
import org.optaplanner.examples.pas.domain.Department;
import org.optaplanner.examples.pas.domain.Room;
public class BedStrengthComparator implements Comparator<Bed>, Serializable {
public int compare(Bed a, Bed b) {
if (a == null) {
if (b == null) {
return 0;
}
return -1;
} else if (b == null) {
return 1;
}
Room aRoom = a.getRoom();
Department aDepartment = aRoom.getDepartment();
Room bRoom = b.getRoom();
Department bDepartment = bRoom.getDepartment();
return new CompareToBuilder()
// null minimumAge is stronger
.append(aDepartment.getMinimumAge() == null, bDepartment.getMinimumAge() == null)
// null maximumAge is stronger
.append(aDepartment.getMaximumAge() == null, bDepartment.getMaximumAge() == null)
// Descending, low minimumAge is stronger
.append(bDepartment.getMinimumAge(), aDepartment.getMinimumAge())
// High maximumAge is stronger
.append(aDepartment.getMaximumAge(), bDepartment.getMaximumAge())
.append(aRoom.getRoomEquipmentList().size(), bRoom.getRoomEquipmentList().size())
.append(aRoom.getRoomSpecialismList().size(), bRoom.getRoomSpecialismList().size())
.append(bRoom.getCapacity(), aRoom.getCapacity()) // Descending (smaller rooms are stronger)
.append(a.getId(), b.getId())
.toComparison();
}
}