/*
* Copyright 2015 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.tsp.domain.solver;
import org.apache.commons.lang3.builder.CompareToBuilder;
import org.optaplanner.core.impl.heuristic.selector.common.decorator.SelectionSorterWeightFactory;
import org.optaplanner.examples.tsp.domain.Domicile;
import org.optaplanner.examples.tsp.domain.Standstill;
import org.optaplanner.examples.tsp.domain.TspSolution;
public class DomicileDistanceStandstillStrengthWeightFactory implements SelectionSorterWeightFactory<TspSolution, Standstill> {
@Override
public Comparable createSorterWeight(TspSolution tspSolution, Standstill standstill) {
Domicile domicile = tspSolution.getDomicile();
long domicileRoundTripDistance = domicile.getDistanceTo(standstill) + standstill.getDistanceTo(domicile);
return new DomicileDistanceStandstillStrengthWeight(standstill, domicileRoundTripDistance);
}
public static class DomicileDistanceStandstillStrengthWeight implements Comparable<DomicileDistanceStandstillStrengthWeight> {
private final Standstill standstill;
private final long domicileRoundTripDistance;
public DomicileDistanceStandstillStrengthWeight(Standstill standstill, long domicileRoundTripDistance) {
this.standstill = standstill;
this.domicileRoundTripDistance = domicileRoundTripDistance;
}
@Override
public int compareTo(DomicileDistanceStandstillStrengthWeight other) {
return new CompareToBuilder()
.append(other.domicileRoundTripDistance, domicileRoundTripDistance) // Decreasing: closer to depot is stronger
.append(standstill.getLocation().getLatitude(), other.standstill.getLocation().getLatitude())
.append(standstill.getLocation().getLongitude(), other.standstill.getLocation().getLongitude())
.toComparison();
}
}
}