/*
 * Copyright 2014 Red Hat, Inc. and/or its affiliates.
 *
 * 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.examination.domain.solver;

import static java.util.Comparator.comparingInt;

import java.util.Comparator;

import org.optaplanner.core.impl.heuristic.selector.common.decorator.SelectionSorterWeightFactory;
import org.optaplanner.examples.examination.domain.Examination;
import org.optaplanner.examples.examination.domain.Room;

public class RoomStrengthWeightFactory implements SelectionSorterWeightFactory<Examination, Room> {

    @Override
    public RoomStrengthWeight createSorterWeight(Examination examination, Room room) {
        return new RoomStrengthWeight(room);
    }

    public static class RoomStrengthWeight implements Comparable<RoomStrengthWeight> {

        private static final Comparator<Room> COMPARATOR = comparingInt(Room::getCapacity)
                .thenComparingLong(Room::getId);

        private final Room room;

        public RoomStrengthWeight(Room room) {
            this.room = room;
        }

        @Override
        public int compareTo(RoomStrengthWeight other) {
            return COMPARATOR.compare(this.room, other.room);
        }

    }

}
