@Override public HardSoftLongScore calculateScore(VehicleRoutingSolution solution, int initScore) { boolean timeWindowed = solution instanceof TimeWindowedVehicleRoutingSolution; List<Customer> customerList = solution.getCustomerList(); List<Vehicle> vehicleList = solution.getVehicleList(); Map<Vehicle, Integer> 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<Vehicle, Integer> 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 build-in hard constraint in // VehicleRoutingImporter return HardSoftLongScore.valueOf(initScore, hardScore, softScore); }