Я следую этому примеру , чтобы настроить MaxTimeInVehicleConstraint в Jsprit. Тем не менее, он возвращает исключение нулевого указателя в этом файле MaxTimeInVehicleConstraint.java в строке 106. Для моего наблюдения, stateManager.getActivityState () возвращает нулевое значение в minSlack.
Так я настраиваю проблему.
public class Test {
static int WHEELCHAIRSPACE_INDEX = 0;
static int PASSENGERSEATS_INDEX = 1;
private VehicleType vehicleType_wheelchair;
private VehicleType vehicleType_solelypassenger;
private VehicleImpl vehicle1,vehicle1_2,vehicle2,vehicle2_2;
private VehicleRoutingProblem.Builder vrpBuilder;
private HardRouteConstraint wheelchair_bus_passenger_pickup_constraint;
private VehicleRoutingAlgorithm algorithm;
private VehicleRoutingProblem problem;
private VehicleRoutingTransportCosts costMatrix;
private static final String FILENAME = "C:\\Users\\admin\\Desktop\\test.txt";
public static void main(String[] args) {
// TODO Auto-generated method stub
Examples.createOutputFolder();
Test test = new Test();
test.createVehicleType();
test.createVehicle();
test.createJob();
test.createConstraint();
test.createProblem();
test.searchSolution();
}
private void searchSolution() {
Collection<VehicleRoutingProblemSolution> solutions = algorithm.searchSolutions();
VehicleRoutingProblemSolution bestSolution = Solutions.bestOf(solutions);
SolutionPrinter.print(problem, bestSolution, SolutionPrinter.Print.VERBOSE);
for(VehicleRoutingProblemSolution solution:solutions) {
System.out.println("*****************************************************************************************************************************************************************************************************");
//SolutionPrinter.print(problem, solution, SolutionPrinter.Print.VERBOSE);
System.out.println("*****************************************************************************************************************************************************************************************************");
}
Plotter problemPlotter = new Plotter(problem);
problemPlotter.plotShipments(true);
problemPlotter.setLabel(Plotter.Label.SIZE);
problemPlotter.plot("output/transportOfDisabledPeopleExample_problem.png", "disabled people tp");
Plotter solutionPlotter = new Plotter(problem, Solutions.bestOf(solutions));
solutionPlotter.plotShipments(true);
solutionPlotter.setLabel(Plotter.Label.SIZE);
solutionPlotter.plot("output/transportOfDisabledPeopleExample_solution.png", "disabled people tp");
}
private void createProblem() {
StateManager stateManager = new StateManager(problem);
StateId id = stateManager.createStateId("max-time");
StateId openJobsId = stateManager.createStateId("open-jobs-id");
stateManager.addStateUpdater(new UpdateMaxTimeInVehicle(stateManager, id, problem.getTransportCosts(), problem.getActivityCosts(), openJobsId));
ConstraintManager constraintManager = new ConstraintManager(problem, stateManager);
constraintManager.addConstraint(wheelchair_bus_passenger_pickup_constraint);
constraintManager.addConstraint(new MaxTimeInVehicleConstraint(problem.getTransportCosts(), problem.getActivityCosts(), id, stateManager, problem, openJobsId), ConstraintManager.Priority.CRITICAL);
algorithm = Jsprit.Builder.newInstance(problem).setStateAndConstraintManager(stateManager,constraintManager).buildAlgorithm();
algorithm.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(100));
}
private void createConstraint() {
wheelchair_bus_passenger_pickup_constraint = new HardRouteConstraint() {
@Override
public boolean fulfilled(JobInsertionContext insertionContext) {
Object shipment2insert;
Capacity capacity;
try {
shipment2insert = ((Shipment) insertionContext.getJob());
capacity = ((Shipment) shipment2insert).getSize();
}catch(Exception e) {
shipment2insert = ((Service) insertionContext.getJob());
capacity = ((Service) shipment2insert).getSize();
}
if (insertionContext.getNewVehicle().getId().equals("wheelchair_bus")) {
if (capacity.get(PASSENGERSEATS_INDEX) > 2) {
return false;
}
}
return true;
}
};
}
private void createJob() {
com.graphhopper.jsprit.core.problem.job.Shipment.Builder builder1 = Shipment.Builder.newInstance("1");
builder1.addSizeDimension(PASSENGERSEATS_INDEX, 1);
builder1.setPickupLocation(Location.newInstance("1a"));
builder1.setDeliveryLocation(Location.newInstance("1b"));
builder1.setDeliveryServiceTime(0);
builder1.setMaxTimeInVehicle(10);
builder1.setPickupTimeWindow(new TimeWindow(0,2));
builder1.setDeliveryTimeWindow(new TimeWindow(4,5));
Shipment shipment1 = builder1.build();
com.graphhopper.jsprit.core.problem.job.Shipment.Builder builder2 = Shipment.Builder.newInstance("2");
builder2.addSizeDimension(PASSENGERSEATS_INDEX, 2);
builder2.setPickupLocation(Location.newInstance("2a"));
builder2.setDeliveryLocation(Location.newInstance("2b"));
builder2.setDeliveryServiceTime(1);
builder2.addRequiredSkill("first");
builder2.setMaxTimeInVehicle(10);
Shipment shipment2 = builder2.build();
com.graphhopper.jsprit.core.problem.job.Shipment.Builder builder3 = Shipment.Builder.newInstance("3");
builder3.addSizeDimension(PASSENGERSEATS_INDEX, 1);
builder3.setPickupLocation(Location.newInstance("3a"));
builder3.setDeliveryLocation(Location.newInstance("3b"));
builder3.setDeliveryServiceTime(0);
builder3.setMaxTimeInVehicle(10);
builder3.setPickupTimeWindow(new TimeWindow(0,7));
builder3.setDeliveryTimeWindow(new TimeWindow(8,10));
Shipment shipment3 = builder3.build();
com.graphhopper.jsprit.core.problem.job.Shipment.Builder builder4 = Shipment.Builder.newInstance("4");
builder4.addSizeDimension(PASSENGERSEATS_INDEX, 1);
builder4.setPickupLocation(Location.newInstance("4a"));
builder4.setDeliveryLocation(Location.newInstance("4b"));
builder4.setDeliveryServiceTime(1);
builder4.setMaxTimeInVehicle(10);
Shipment shipment4 = builder4.build();
com.graphhopper.jsprit.core.problem.job.Shipment.Builder builder5 = Shipment.Builder.newInstance("5");
builder5.addSizeDimension(PASSENGERSEATS_INDEX, 1);
builder5.setPickupLocation(Location.newInstance("5a"));
builder5.setDeliveryLocation(Location.newInstance("5b"));
builder5.setDeliveryServiceTime(0);
builder5.setMaxTimeInVehicle(10);
Shipment shipment5 = builder5.build();
setTransportCost();
vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
vrpBuilder.addVehicle(vehicle1);
vrpBuilder.addVehicle(vehicle2);
vrpBuilder.addVehicle(vehicle1_2);
vrpBuilder.addVehicle(vehicle2_2);
vrpBuilder.addJob(shipment1).addJob(shipment2).addJob(shipment3).addJob(shipment4);
vrpBuilder.addJob(shipment5);
vrpBuilder.setFleetSize(FleetSize.FINITE);
vrpBuilder.setRoutingCost(costMatrix);
problem = vrpBuilder.build();
}
private void setTransportCost() {
// TODO Auto-generated method stub
VehicleRoutingTransportCostsMatrix.Builder costMatrixBuilder = VehicleRoutingTransportCostsMatrix.Builder.newInstance(true);
costMatrixBuilder.addTransportTime("0", "0", 0.0);
costMatrixBuilder.addTransportTime("0", "1a", 2.0);
costMatrixBuilder.addTransportTime("0", "1b", 3.3);
costMatrixBuilder.addTransportTime("0", "2a", 2.0);
costMatrixBuilder.addTransportTime("0", "2b", 4.3);
costMatrixBuilder.addTransportTime("0", "3a", 3.5);
costMatrixBuilder.addTransportTime("0", "3b", 3.0);
costMatrixBuilder.addTransportTime("0", "4a", 1.5);
costMatrixBuilder.addTransportTime("0", "4b", 2.7);
costMatrixBuilder.addTransportTime("0", "5a", 1.2);
costMatrixBuilder.addTransportTime("0", "5b", 3.5);
costMatrixBuilder.addTransportTime("1a", "0", 2.0);
costMatrixBuilder.addTransportTime("1a", "1a", 0.0);
costMatrixBuilder.addTransportTime("1a", "1b", 2.5);
costMatrixBuilder.addTransportTime("1a", "2a", 2.3);
costMatrixBuilder.addTransportTime("1a", "2b", 4.4);
costMatrixBuilder.addTransportTime("1a", "3a", 4.0);
costMatrixBuilder.addTransportTime("1a", "3b", 4.0);
costMatrixBuilder.addTransportTime("1a", "4a", 2.3);
costMatrixBuilder.addTransportTime("1a", "4b", 4.5);
costMatrixBuilder.addTransportTime("1a", "5a", 3.2);
costMatrixBuilder.addTransportTime("1a", "5b", 1.5);
costMatrixBuilder.addTransportTime("1b", "0", 3.3);
costMatrixBuilder.addTransportTime("1b", "1a", 2.5);
costMatrixBuilder.addTransportTime("1b", "1b", 0.0);
costMatrixBuilder.addTransportTime("1b", "2a", 1.7);
costMatrixBuilder.addTransportTime("1b", "2b", 2.2);
costMatrixBuilder.addTransportTime("1b", "3a", 2.5);
costMatrixBuilder.addTransportTime("1b", "3b", 3.4);
costMatrixBuilder.addTransportTime("1b", "4a", 4.5);
costMatrixBuilder.addTransportTime("1b", "4b", 5.0);
costMatrixBuilder.addTransportTime("1b", "5a", 4.5);
costMatrixBuilder.addTransportTime("1b", "5b", 2.2);
costMatrixBuilder.addTransportTime("2a", "0", 2.0);
costMatrixBuilder.addTransportTime("2a", "1a", 2.3);
costMatrixBuilder.addTransportTime("2a", "1b", 1.7);
costMatrixBuilder.addTransportTime("2a", "2a", 0.0);
costMatrixBuilder.addTransportTime("2a", "2b", 2.3);
costMatrixBuilder.addTransportTime("2a", "3a", 1.7);
costMatrixBuilder.addTransportTime("2a", "3b", 1.8);
costMatrixBuilder.addTransportTime("2a", "4a", 3.3);
costMatrixBuilder.addTransportTime("2a", "4b", 3.2);
costMatrixBuilder.addTransportTime("2a", "5a", 3.0);
costMatrixBuilder.addTransportTime("2a", "5b", 2.9);
costMatrixBuilder.addTransportTime("2b", "0", 4.3);
costMatrixBuilder.addTransportTime("2b", "1a", 4.4);
costMatrixBuilder.addTransportTime("2b", "1b", 2.2);
costMatrixBuilder.addTransportTime("2b", "2a", 2.3);
costMatrixBuilder.addTransportTime("2b", "2b", 0.0);
costMatrixBuilder.addTransportTime("2b", "3a", 1.2);
costMatrixBuilder.addTransportTime("2b", "3b", 2.8);
costMatrixBuilder.addTransportTime("2b", "4a", 5.7);
costMatrixBuilder.addTransportTime("2b", "4b", 4.5);
costMatrixBuilder.addTransportTime("2b", "5a", 5.2);
costMatrixBuilder.addTransportTime("2b", "5b", 4.3);
costMatrixBuilder.addTransportTime("3a", "0", 3.5);
costMatrixBuilder.addTransportTime("3a", "1a", 4.0);
costMatrixBuilder.addTransportTime("3a", "1b", 2.5);
costMatrixBuilder.addTransportTime("3a", "2a", 1.7);
costMatrixBuilder.addTransportTime("3a", "2b", 1.2);
costMatrixBuilder.addTransportTime("3a", "3a", 0.0);
costMatrixBuilder.addTransportTime("3a", "3b", 1.5);
costMatrixBuilder.addTransportTime("3a", "4a", 5.0);
costMatrixBuilder.addTransportTime("3a", "4b", 3.3);
costMatrixBuilder.addTransportTime("3a", "5a", 4.2);
costMatrixBuilder.addTransportTime("3a", "5b", 4.3);
costMatrixBuilder.addTransportTime("3b", "0", 3.0);
costMatrixBuilder.addTransportTime("3b", "1a", 4.0);
costMatrixBuilder.addTransportTime("3b", "1b", 3.4);
costMatrixBuilder.addTransportTime("3b", "2a", 1.8);
costMatrixBuilder.addTransportTime("3b", "2b", 2.8);
costMatrixBuilder.addTransportTime("3b", "3a", 1.5);
costMatrixBuilder.addTransportTime("3b", "3b", 0.0);
costMatrixBuilder.addTransportTime("3b", "4a", 4.3);
costMatrixBuilder.addTransportTime("3b", "4b", 1.8);
costMatrixBuilder.addTransportTime("3b", "5a", 2.8);
costMatrixBuilder.addTransportTime("3b", "5b", 5.0);
costMatrixBuilder.addTransportTime("4a", "0", 1.5);
costMatrixBuilder.addTransportTime("4a", "1a", 2.3);
costMatrixBuilder.addTransportTime("4a", "1b", 4.5);
costMatrixBuilder.addTransportTime("4a", "2a", 3.3);
costMatrixBuilder.addTransportTime("4a", "2b", 5.7);
costMatrixBuilder.addTransportTime("4a", "3a", 5.0);
costMatrixBuilder.addTransportTime("4a", "3b", 4.3);
costMatrixBuilder.addTransportTime("4a", "4a", 0.0);
costMatrixBuilder.addTransportTime("4a", "4b", 3.6);
costMatrixBuilder.addTransportTime("4a", "5a", 1.7);
costMatrixBuilder.addTransportTime("4a", "5b", 3.8);
costMatrixBuilder.addTransportTime("4b", "0", 2.7);
costMatrixBuilder.addTransportTime("4b", "1a", 4.5);
costMatrixBuilder.addTransportTime("4b", "1b", 5.0);
costMatrixBuilder.addTransportTime("4b", "2a", 3.2);
costMatrixBuilder.addTransportTime("4b", "2b", 4.5);
costMatrixBuilder.addTransportTime("4b", "3a", 3.3);
costMatrixBuilder.addTransportTime("4b", "3b", 1.8);
costMatrixBuilder.addTransportTime("4b", "4a", 3.6);
costMatrixBuilder.addTransportTime("4b", "4b", 0.0);
costMatrixBuilder.addTransportTime("4b", "5a", 1.9);
costMatrixBuilder.addTransportTime("4b", "5b", 5.7);
costMatrixBuilder.addTransportTime("5a", "0", 1.2);
costMatrixBuilder.addTransportTime("5a", "1a", 3.2);
costMatrixBuilder.addTransportTime("5a", "1b", 4.5);
costMatrixBuilder.addTransportTime("5a", "2a", 3.0);
costMatrixBuilder.addTransportTime("5a", "2b", 5.2);
costMatrixBuilder.addTransportTime("5a", "3a", 4.2);
costMatrixBuilder.addTransportTime("5a", "3b", 2.8);
costMatrixBuilder.addTransportTime("5a", "4a", 1.7);
costMatrixBuilder.addTransportTime("5a", "4b", 1.9);
costMatrixBuilder.addTransportTime("5a", "5a", 0.0);
costMatrixBuilder.addTransportTime("5a", "5b", 4.7);
costMatrixBuilder.addTransportTime("5b", "0", 3.5);
costMatrixBuilder.addTransportTime("5b", "1a", 1.5);
costMatrixBuilder.addTransportTime("5b", "1b", 2.2);
costMatrixBuilder.addTransportTime("5b", "2a", 2.9);
costMatrixBuilder.addTransportTime("5b", "2b", 4.3);
costMatrixBuilder.addTransportTime("5b", "3a", 4.3);
costMatrixBuilder.addTransportTime("5b", "3b", 5.0);
costMatrixBuilder.addTransportTime("5b", "4a", 3.8);
costMatrixBuilder.addTransportTime("5b", "4b", 5.7);
costMatrixBuilder.addTransportTime("5b", "5a", 4.7);
costMatrixBuilder.addTransportTime("5b", "5b", 0.0);
costMatrix = costMatrixBuilder.build();
}
private void createVehicle() {
Builder vehicleBuilder1 = VehicleImpl.Builder.newInstance("wheelchair_bus");
vehicleBuilder1.setStartLocation(Location.newInstance("0")).setEndLocation(Location.newInstance("0"));
vehicleBuilder1.setType(vehicleType_wheelchair);
vehicleBuilder1.setEarliestStart(0);
vehicleBuilder1.setLatestArrival(100);
Break myFirstBreak = Break.Builder.newInstance("myFirstBreak")
.setTimeWindow(TimeWindow.newInstance(5, 7)).setServiceTime(3).build();
vehicleBuilder1.setBreak(myFirstBreak);
vehicleBuilder1.addSkill("first");
vehicle1 = vehicleBuilder1.build();
Builder vehicleBuilder1_2 = VehicleImpl.Builder.newInstance("wheelchair_bus_2");
vehicleBuilder1_2.setStartLocation(Location.newInstance("0")).setEndLocation(Location.newInstance("0"));
vehicleBuilder1_2.setType(vehicleType_wheelchair);
vehicleBuilder1_2.setEarliestStart(0);
vehicleBuilder1_2.setLatestArrival(20);
vehicle1_2 = vehicleBuilder1_2.build();
Builder vehicleBuilder2 = VehicleImpl.Builder.newInstance("passenger_bus");
vehicleBuilder2.setStartLocation(Location.newInstance("0")).setEndLocation(Location.newInstance("0"));
vehicleBuilder2.setType(vehicleType_solelypassenger);
vehicleBuilder2.setEarliestStart(0);
vehicleBuilder2.setLatestArrival(20);
vehicleBuilder2.addSkill("second");
vehicle2 = vehicleBuilder2.build();
Builder vehicleBuilder2_2 = VehicleImpl.Builder.newInstance("passenger_bus_2");
vehicleBuilder2_2.setStartLocation(Location.newInstance("0")).setEndLocation(Location.newInstance("0"));
vehicleBuilder2_2.setType(vehicleType_solelypassenger);
vehicleBuilder2_2.setEarliestStart(0);
vehicleBuilder2_2.setLatestArrival(20);
vehicleBuilder2_2.addSkill("third");
vehicle2_2 = vehicleBuilder2_2.build();
}
private void createVehicleType() {
VehicleTypeImpl.Builder wheelChairTypeBuilder = VehicleTypeImpl.Builder.newInstance("wheelChairBusType");
//wheelChairTypeBuilder.addCapacityDimension(WHEELCHAIRSPACE_INDEX, 2);
wheelChairTypeBuilder.addCapacityDimension(PASSENGERSEATS_INDEX, 5);
//wheelChairTypeBuilder.setCostPerDistance(1);
wheelChairTypeBuilder.setCostPerTransportTime(2);
wheelChairTypeBuilder.setFixedCost(0);
vehicleType_wheelchair = wheelChairTypeBuilder.build();
VehicleTypeImpl.Builder soleyPassengerTypeBuilder = VehicleTypeImpl.Builder.newInstance("passengerBusType");
soleyPassengerTypeBuilder.addCapacityDimension(PASSENGERSEATS_INDEX, 6);
//soleyPassengerTypeBuilder.setCostPerDistance(1);
soleyPassengerTypeBuilder.setCostPerTransportTime(2);
soleyPassengerTypeBuilder.setFixedCost(0);
vehicleType_solelypassenger = soleyPassengerTypeBuilder.build();
}
private static Location loc(Coordinate coordinate) {
return Location.Builder.newInstance().setCoordinate(coordinate).build();
}
}
Это ошибка после запуска моей проблемы.
Я попытался назначить значение по умолчанию для minSlack, когда оно ловит исключение нулевого указателя. Тогда Jsprit запустится полностью. Однако я не уверен, что этот метод правильный или нет.
Вот так я редактирую MaxTimeInVehicleConstraint.java в строке 106
double minSlack = Double.MAX_VALUE;
try{
if (!(nextAct instanceof End)) {
minSlack = stateManager.getActivityState(nextAct, iFacts.getNewVehicle(), minSlackId, Double.class);
}
}catch(Exception e) {
}
Это ошибка в Jspirt? Правильно ли мое решение? У кого-нибудь есть лучшее решение для этой проблемы?