[6773] | 1 | #region License Information
|
---|
| 2 | /* HeuristicLab
|
---|
[17180] | 3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
|
---|
[6773] | 4 | *
|
---|
| 5 | * This file is part of HeuristicLab.
|
---|
| 6 | *
|
---|
| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
|
---|
| 8 | * it under the terms of the GNU General Public License as published by
|
---|
| 9 | * the Free Software Foundation, either version 3 of the License, or
|
---|
| 10 | * (at your option) any later version.
|
---|
| 11 | *
|
---|
| 12 | * HeuristicLab is distributed in the hope that it will be useful,
|
---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 15 | * GNU General Public License for more details.
|
---|
| 16 | *
|
---|
| 17 | * You should have received a copy of the GNU General Public License
|
---|
| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
|
---|
| 19 | */
|
---|
| 20 | #endregion
|
---|
| 21 |
|
---|
[8053] | 22 | using System.Collections.Generic;
|
---|
| 23 | using HeuristicLab.Common;
|
---|
[6773] | 24 | using HeuristicLab.Core;
|
---|
| 25 | using HeuristicLab.Optimization;
|
---|
[8053] | 26 | using HeuristicLab.Parameters;
|
---|
[16565] | 27 | using HEAL.Attic;
|
---|
[6773] | 28 | using HeuristicLab.Problems.VehicleRouting.Interfaces;
|
---|
| 29 | using HeuristicLab.Problems.VehicleRouting.Variants;
|
---|
| 30 |
|
---|
| 31 | namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
|
---|
| 32 | [Item("PotvinPDShiftSingleMoveGenerator", "Generates a single shift move from a given PDP encoding.")]
|
---|
[16565] | 33 | [StorableType("32B14D12-CC48-439E-9DDD-780F866B764F")]
|
---|
[6773] | 34 | public sealed class PotvinPDShiftSingleMoveGenerator : PotvinPDShiftMoveGenerator,
|
---|
[8053] | 35 | ISingleMoveGenerator {
|
---|
[6773] | 36 | public ILookupParameter<IRandom> RandomParameter {
|
---|
| 37 | get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
|
---|
| 38 | }
|
---|
| 39 |
|
---|
| 40 | public override IDeepCloneable Clone(Cloner cloner) {
|
---|
| 41 | return new PotvinPDShiftSingleMoveGenerator(this, cloner);
|
---|
| 42 | }
|
---|
| 43 |
|
---|
| 44 | [StorableConstructor]
|
---|
[16565] | 45 | private PotvinPDShiftSingleMoveGenerator(StorableConstructorFlag _) : base(_) { }
|
---|
[6773] | 46 |
|
---|
| 47 | public PotvinPDShiftSingleMoveGenerator()
|
---|
| 48 | : base() {
|
---|
| 49 | Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator."));
|
---|
| 50 | }
|
---|
| 51 |
|
---|
| 52 | private PotvinPDShiftSingleMoveGenerator(PotvinPDShiftSingleMoveGenerator original, Cloner cloner)
|
---|
| 53 | : base(original, cloner) {
|
---|
| 54 | }
|
---|
| 55 |
|
---|
| 56 | public static PotvinPDShiftMove Apply(PotvinEncoding individual, IVRPProblemInstance problemInstance, IRandom rand) {
|
---|
| 57 | List<int> cities = new List<int>();
|
---|
| 58 |
|
---|
| 59 | IPickupAndDeliveryProblemInstance pdp = problemInstance as IPickupAndDeliveryProblemInstance;
|
---|
| 60 | for (int i = 1; i <= individual.Cities; i++) {
|
---|
[6909] | 61 | if (pdp == null || pdp.GetDemand(i) >= 0)
|
---|
[6773] | 62 | cities.Add(i);
|
---|
| 63 | }
|
---|
| 64 |
|
---|
[7791] | 65 | if (cities.Count >= 1) {
|
---|
[6909] | 66 | int city = cities[rand.Next(cities.Count)];
|
---|
| 67 | Tour oldTour = individual.Tours.Find(t => t.Stops.Contains(city));
|
---|
| 68 | int oldTourIndex = individual.Tours.IndexOf(oldTour);
|
---|
[6773] | 69 |
|
---|
[6909] | 70 | int max = individual.Tours.Count;
|
---|
[7791] | 71 | if (individual.Tours.Count >= problemInstance.Vehicles.Value)
|
---|
[6909] | 72 | max = max - 1;
|
---|
[6773] | 73 |
|
---|
[6909] | 74 | int newTourIndex = rand.Next(max);
|
---|
| 75 | if (newTourIndex >= oldTourIndex)
|
---|
| 76 | newTourIndex++;
|
---|
[6773] | 77 |
|
---|
[6909] | 78 | return new PotvinPDShiftMove(city, oldTourIndex, newTourIndex, individual);
|
---|
| 79 | } else {
|
---|
| 80 | return null;
|
---|
[8053] | 81 | }
|
---|
[6773] | 82 | }
|
---|
| 83 |
|
---|
| 84 | protected override PotvinPDShiftMove[] GenerateMoves(PotvinEncoding individual, IVRPProblemInstance problemInstance) {
|
---|
| 85 | List<PotvinPDShiftMove> result = new List<PotvinPDShiftMove>();
|
---|
| 86 |
|
---|
| 87 | PotvinPDShiftMove move = Apply(individual, ProblemInstance, RandomParameter.ActualValue);
|
---|
| 88 | if (move != null)
|
---|
| 89 | result.Add(move);
|
---|
| 90 |
|
---|
| 91 | return result.ToArray();
|
---|
| 92 | }
|
---|
| 93 | }
|
---|
| 94 | }
|
---|