/*
 * 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.drools.planner.examples.pas.domain.solver;

import java.io.Serializable;
import java.util.Comparator;

import org.apache.commons.lang.builder.CompareToBuilder;
import org.drools.planner.examples.pas.domain.Bed;
import org.drools.planner.examples.pas.domain.Room;

public class BedStrengthComparator implements Comparator<Object>, Serializable {

    public int compare(Object a, Object b) {
        return compare((Bed) a, (Bed) b);
    }

    public int compare(Bed a, Bed b) {
        Room aRoom = a.getRoom();
        Room bRoom = b.getRoom();
        return new CompareToBuilder()
                .append(bRoom.getCapacity(), aRoom.getCapacity()) // Descending (smaller rooms are stronger)
                .append(aRoom.getRoomEquipmentList().size() + aRoom.getRoomSpecialismList().size(),
                        bRoom.getRoomEquipmentList().size() + bRoom.getRoomSpecialismList().size())
                .append(a.getId(), b.getId())
                .toComparison();
    }

}
