[4379] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[11185] | 3 | * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[4379] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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[8053] | 22 | using System.Collections.Generic;
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[4379] | 23 | using HeuristicLab.Common;
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| 24 | using HeuristicLab.Core;
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| 25 | using HeuristicLab.Data;
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| 26 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 27 | using HeuristicLab.Problems.VehicleRouting.Encodings.General;
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| 28 | using HeuristicLab.Problems.VehicleRouting.Interfaces;
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| 29 | using HeuristicLab.Problems.VehicleRouting.Variants;
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| 30 |
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| 31 | namespace HeuristicLab.Problems.VehicleRouting.Encodings.GVR {
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| 32 | [Item("GVREncoding", "Represents a potvin encoding of VRP solutions. It is implemented as described in Pereira, F.B. et al (2002). GVR: a New Genetic Representation for the Vehicle Routing Problem. AICS 2002, LNAI 2464, pp. 95-102.")]
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| 33 | [StorableClass]
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| 34 | public class GVREncoding : TourEncoding {
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| 35 | public override List<Tour> GetTours() {
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[8053] | 36 | List<Tour> tours = new List<Tour>();
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[4379] | 37 |
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| 38 | foreach (Tour tour in base.Tours) {
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| 39 | Tour newTour = new Tour();
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| 40 | double currentDemand = 0;
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| 41 |
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| 42 | DoubleValue capacity = new DoubleValue(double.MaxValue);
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| 43 | if (ProblemInstance is IHomogenousCapacitatedProblemInstance) {
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| 44 | capacity.Value = (ProblemInstance as IHomogenousCapacitatedProblemInstance).Capacity.Value;
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| 45 | }
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| 46 |
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| 47 |
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| 48 | foreach (int city in tour.Stops) {
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[6851] | 49 | currentDemand += ProblemInstance.GetDemand(city);
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[4379] | 50 |
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| 51 | if (currentDemand > capacity.Value) {
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| 52 | if (newTour.Stops.Count > 0)
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| 53 | tours.Add(newTour);
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| 54 |
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| 55 | newTour = new Tour();
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| 56 | newTour.Stops.Add(city);
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[6851] | 57 | currentDemand = ProblemInstance.GetDemand(city);
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[4379] | 58 | } else {
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| 59 | newTour.Stops.Add(city);
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| 60 | }
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| 61 | }
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| 62 |
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| 63 | if (newTour.Stops.Count > 0)
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| 64 | tours.Add(newTour);
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| 65 | }
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| 66 |
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| 67 | //repair if there are too many vehicles used
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| 68 | while (tours.Count > ProblemInstance.Vehicles.Value) {
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| 69 | Tour tour = tours[tours.Count - 1];
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| 70 | tours[tours.Count - 2].Stops.AddRange(tour.Stops);
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| 71 |
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| 72 | tours.Remove(tour);
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[8053] | 73 | }
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[4379] | 74 |
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| 75 | return tours;
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| 76 | }
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[8053] | 77 |
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[4379] | 78 | public GVREncoding(IVRPProblemInstance problemInstance)
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| 79 | : base(problemInstance) {
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| 80 | }
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| 81 |
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| 82 | [StorableConstructor]
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[7906] | 83 | protected GVREncoding(bool serializing)
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[4379] | 84 | : base(serializing) {
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| 85 | }
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| 86 |
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[4752] | 87 | public override IDeepCloneable Clone(Cloner cloner) {
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| 88 | return new GVREncoding(this, cloner);
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| 89 | }
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| 90 |
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| 91 | protected GVREncoding(GVREncoding original, Cloner cloner)
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| 92 | : base(original, cloner) {
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| 93 | }
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| 94 |
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[4379] | 95 | public static GVREncoding ConvertFrom(IVRPEncoding encoding, IVRPProblemInstance problemInstance) {
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| 96 | GVREncoding solution = new GVREncoding(problemInstance);
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| 97 |
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| 98 | TourEncoding.ConvertFrom(encoding, solution, problemInstance);
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| 99 |
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| 100 | return solution;
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| 101 | }
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| 102 |
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| 103 | public static GVREncoding ConvertFrom(List<int> route, IVRPProblemInstance problemInstance) {
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| 104 | GVREncoding solution = new GVREncoding(problemInstance);
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| 105 |
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| 106 | TourEncoding.ConvertFrom(route, solution);
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| 107 |
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| 108 | return solution;
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| 109 | }
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| 110 |
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| 111 | internal void FindCustomer(int customer, out Tour tour, out int index) {
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| 112 | tour = null;
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| 113 | index = -1;
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| 114 |
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| 115 | int currentTour = 0;
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| 116 | while (tour == null && currentTour < Tours.Count) {
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| 117 | int currentCity = 0;
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| 118 | while (tour == null && currentCity < Tours[currentTour].Stops.Count) {
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| 119 | if (Tours[currentTour].Stops[currentCity] == customer) {
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| 120 | tour = Tours[currentTour];
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| 121 | index = currentCity;
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| 122 | }
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| 123 |
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| 124 | currentCity++;
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| 125 | }
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| 126 |
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| 127 | currentTour++;
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| 128 | }
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| 129 | }
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| 130 | }
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| 131 | }
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