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OptaPlanner solves planning problems.
This lightweight, embeddable planning engine implements powerful and scalable algorithms
to optimize business resource scheduling and planning.
This module contains the examples which demonstrate how to use it in a normal Java application.
/*
* Copyright 2013 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.vehiclerouting.solver.score;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.optaplanner.core.api.score.buildin.hardsoftlong.HardSoftLongScore;
import org.optaplanner.core.impl.score.director.easy.EasyScoreCalculator;
import org.optaplanner.examples.vehiclerouting.domain.Customer;
import org.optaplanner.examples.vehiclerouting.domain.Standstill;
import org.optaplanner.examples.vehiclerouting.domain.Vehicle;
import org.optaplanner.examples.vehiclerouting.domain.VehicleRoutingSolution;
import org.optaplanner.examples.vehiclerouting.domain.timewindowed.TimeWindowedCustomer;
import org.optaplanner.examples.vehiclerouting.domain.timewindowed.TimeWindowedVehicleRoutingSolution;
public class VehicleRoutingEasyScoreCalculator implements EasyScoreCalculator {
@Override
public HardSoftLongScore calculateScore(VehicleRoutingSolution solution) {
boolean timeWindowed = solution instanceof TimeWindowedVehicleRoutingSolution;
List customerList = solution.getCustomerList();
List vehicleList = solution.getVehicleList();
Map vehicleDemandMap = new HashMap<>(vehicleList.size());
for (Vehicle vehicle : vehicleList) {
vehicleDemandMap.put(vehicle, 0);
}
long hardScore = 0L;
long softScore = 0L;
for (Customer customer : customerList) {
Standstill previousStandstill = customer.getPreviousStandstill();
if (previousStandstill != null) {
Vehicle vehicle = customer.getVehicle();
vehicleDemandMap.put(vehicle, vehicleDemandMap.get(vehicle) + customer.getDemand());
// Score constraint distanceToPreviousStandstill
softScore -= customer.getDistanceFromPreviousStandstill();
if (customer.getNextCustomer() == null) {
// Score constraint distanceFromLastCustomerToDepot
softScore -= customer.getLocation().getDistanceTo(vehicle.getLocation());
}
if (timeWindowed) {
TimeWindowedCustomer timeWindowedCustomer = (TimeWindowedCustomer) customer;
long dueTime = timeWindowedCustomer.getDueTime();
Long arrivalTime = timeWindowedCustomer.getArrivalTime();
if (dueTime < arrivalTime) {
// Score constraint arrivalAfterDueTime
hardScore -= (arrivalTime - dueTime);
}
}
}
}
for (Map.Entry entry : vehicleDemandMap.entrySet()) {
int capacity = entry.getKey().getCapacity();
int demand = entry.getValue();
if (demand > capacity) {
// Score constraint vehicleCapacity
hardScore -= (demand - capacity);
}
}
// Score constraint arrivalAfterDueTimeAtDepot is a built-in hard constraint in VehicleRoutingImporter
return HardSoftLongScore.of(hardScore, softScore);
}
}