[2796] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[16453] | 3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[2796] | 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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[2865] | 22 | using System;
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[2975] | 23 | using System.Collections.Generic;
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[3153] | 24 | using System.IO;
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[2865] | 25 | using System.Linq;
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[8478] | 26 | using HeuristicLab.Analysis;
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[2975] | 27 | using HeuristicLab.Common;
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[2796] | 28 | using HeuristicLab.Core;
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| 29 | using HeuristicLab.Data;
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[3053] | 30 | using HeuristicLab.Encodings.PermutationEncoding;
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[2834] | 31 | using HeuristicLab.Optimization;
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[12102] | 32 | using HeuristicLab.Optimization.Operators;
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[2805] | 33 | using HeuristicLab.Parameters;
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[16462] | 34 | using HEAL.Fossil;
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[2865] | 35 | using HeuristicLab.PluginInfrastructure;
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[7558] | 36 | using HeuristicLab.Problems.Instances;
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[2796] | 37 |
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[3158] | 38 | namespace HeuristicLab.Problems.TravelingSalesman {
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[13173] | 39 | [Item("Traveling Salesman Problem (TSP)", "Represents a symmetric Traveling Salesman Problem.")]
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[12504] | 40 | [Creatable(CreatableAttribute.Categories.CombinatorialProblems, Priority = 100)]
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[16462] | 41 | [StorableType("F0A3550C-2B8F-497D-BF32-5763F8D7592C")]
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[7558] | 42 | public sealed class TravelingSalesmanProblem : SingleObjectiveHeuristicOptimizationProblem<ITSPEvaluator, IPermutationCreator>, IStorableContent,
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| 43 | IProblemInstanceConsumer<TSPData> {
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| 44 | private static readonly int DistanceMatrixSizeLimit = 1000;
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[4419] | 45 | public string Filename { get; set; }
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| 46 |
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[2975] | 47 | #region Parameter Properties
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[7621] | 48 | public OptionalValueParameter<DoubleMatrix> CoordinatesParameter {
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| 49 | get { return (OptionalValueParameter<DoubleMatrix>)Parameters["Coordinates"]; }
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[2865] | 50 | }
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[4825] | 51 | public OptionalValueParameter<DistanceMatrix> DistanceMatrixParameter {
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| 52 | get { return (OptionalValueParameter<DistanceMatrix>)Parameters["DistanceMatrix"]; }
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[3066] | 53 | }
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| 54 | public ValueParameter<BoolValue> UseDistanceMatrixParameter {
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| 55 | get { return (ValueParameter<BoolValue>)Parameters["UseDistanceMatrix"]; }
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| 56 | }
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[3151] | 57 | public OptionalValueParameter<Permutation> BestKnownSolutionParameter {
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| 58 | get { return (OptionalValueParameter<Permutation>)Parameters["BestKnownSolution"]; }
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| 59 | }
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[2975] | 60 | #endregion
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[2805] | 61 |
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[2975] | 62 | #region Properties
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[3048] | 63 | public DoubleMatrix Coordinates {
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[2975] | 64 | get { return CoordinatesParameter.Value; }
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| 65 | set { CoordinatesParameter.Value = value; }
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[2865] | 66 | }
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[4825] | 67 | public DistanceMatrix DistanceMatrix {
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[3066] | 68 | get { return DistanceMatrixParameter.Value; }
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| 69 | set { DistanceMatrixParameter.Value = value; }
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| 70 | }
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| 71 | public BoolValue UseDistanceMatrix {
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| 72 | get { return UseDistanceMatrixParameter.Value; }
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| 73 | set { UseDistanceMatrixParameter.Value = value; }
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| 74 | }
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[3151] | 75 | public Permutation BestKnownSolution {
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| 76 | get { return BestKnownSolutionParameter.Value; }
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| 77 | set { BestKnownSolutionParameter.Value = value; }
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| 78 | }
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[3663] | 79 | private BestTSPSolutionAnalyzer BestTSPSolutionAnalyzer {
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[6938] | 80 | get { return Operators.OfType<BestTSPSolutionAnalyzer>().FirstOrDefault(); }
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[3616] | 81 | }
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[4623] | 82 | private TSPAlleleFrequencyAnalyzer TSPAlleleFrequencyAnalyzer {
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[6938] | 83 | get { return Operators.OfType<TSPAlleleFrequencyAnalyzer>().FirstOrDefault(); }
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[4623] | 84 | }
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[2975] | 85 | #endregion
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[2865] | 86 |
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[6938] | 87 | // BackwardsCompatibility3.3
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| 88 | #region Backwards compatible code, remove with 3.4
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| 89 | [Obsolete]
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| 90 | [Storable(Name = "operators")]
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| 91 | private IEnumerable<IOperator> oldOperators {
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| 92 | get { return null; }
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| 93 | set {
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| 94 | if (value != null && value.Any())
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| 95 | Operators.AddRange(value);
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| 96 | }
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| 97 | }
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| 98 | #endregion
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[4098] | 99 |
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| 100 | [StorableConstructor]
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[16462] | 101 | private TravelingSalesmanProblem(StorableConstructorFlag _) : base(_) { }
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[4722] | 102 | private TravelingSalesmanProblem(TravelingSalesmanProblem original, Cloner cloner)
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| 103 | : base(original, cloner) {
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[7351] | 104 | RegisterEventHandlers();
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[4722] | 105 | }
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| 106 | public override IDeepCloneable Clone(Cloner cloner) {
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| 107 | return new TravelingSalesmanProblem(this, cloner);
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| 108 | }
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[3159] | 109 | public TravelingSalesmanProblem()
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[6938] | 110 | : base(new TSPRoundedEuclideanPathEvaluator(), new RandomPermutationCreator()) {
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[7621] | 111 | Parameters.Add(new OptionalValueParameter<DoubleMatrix>("Coordinates", "The x- and y-Coordinates of the cities."));
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[4825] | 112 | Parameters.Add(new OptionalValueParameter<DistanceMatrix>("DistanceMatrix", "The matrix which contains the distances between the cities."));
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[8221] | 113 | Parameters.Add(new ValueParameter<BoolValue>("UseDistanceMatrix", "True if the coordinates based evaluators should calculate the distance matrix from the coordinates and use it for evaluation similar to the distance matrix evaluator, otherwise false.", new BoolValue(true)));
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[3151] | 114 | Parameters.Add(new OptionalValueParameter<Permutation>("BestKnownSolution", "The best known solution of this TSP instance."));
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[2865] | 115 |
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[6939] | 116 | Maximization.Value = false;
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[6051] | 117 | MaximizationParameter.Hidden = true;
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[8221] | 118 | UseDistanceMatrixParameter.Hidden = true;
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[4825] | 119 | DistanceMatrixParameter.ReactOnValueToStringChangedAndValueItemImageChanged = false;
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| 120 |
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[3504] | 121 | Coordinates = new DoubleMatrix(new double[,] {
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| 122 | { 100, 100 }, { 100, 200 }, { 100, 300 }, { 100, 400 },
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| 123 | { 200, 100 }, { 200, 200 }, { 200, 300 }, { 200, 400 },
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| 124 | { 300, 100 }, { 300, 200 }, { 300, 300 }, { 300, 400 },
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| 125 | { 400, 100 }, { 400, 200 }, { 400, 300 }, { 400, 400 }
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| 126 | });
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| 127 |
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[6938] | 128 | SolutionCreator.PermutationParameter.ActualName = "TSPTour";
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| 129 | Evaluator.QualityParameter.ActualName = "TSPTourLength";
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[2975] | 130 | ParameterizeSolutionCreator();
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| 131 | ParameterizeEvaluator();
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[2865] | 132 |
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[4098] | 133 | InitializeOperators();
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[7351] | 134 | RegisterEventHandlers();
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[2975] | 135 | }
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[2891] | 136 |
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[2975] | 137 | #region Events
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[6938] | 138 | protected override void OnSolutionCreatorChanged() {
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| 139 | base.OnSolutionCreatorChanged();
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| 140 | SolutionCreator.PermutationParameter.ActualNameChanged += new EventHandler(SolutionCreator_PermutationParameter_ActualNameChanged);
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| 141 | ParameterizeSolutionCreator();
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| 142 | ParameterizeEvaluator();
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| 143 | ParameterizeAnalyzers();
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| 144 | ParameterizeOperators();
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[2865] | 145 | }
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[6938] | 146 | protected override void OnEvaluatorChanged() {
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| 147 | base.OnEvaluatorChanged();
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| 148 | Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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| 149 | ParameterizeEvaluator();
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[7621] | 150 | ParameterizeSolutionCreator();
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[6938] | 151 | UpdateMoveEvaluators();
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| 152 | ParameterizeAnalyzers();
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[8221] | 153 | if (Evaluator is ITSPCoordinatesPathEvaluator && Coordinates != null)
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| 154 | ClearDistanceMatrix();
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[2975] | 155 | }
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| 156 | private void CoordinatesParameter_ValueChanged(object sender, EventArgs e) {
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[7621] | 157 | if (Coordinates != null) {
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| 158 | Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(Coordinates_ItemChanged);
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| 159 | Coordinates.Reset += new EventHandler(Coordinates_Reset);
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| 160 | }
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[8221] | 161 | if (Evaluator is ITSPCoordinatesPathEvaluator) {
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| 162 | ParameterizeSolutionCreator();
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| 163 | ClearDistanceMatrix();
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| 164 | }
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[2975] | 165 | }
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| 166 | private void Coordinates_ItemChanged(object sender, EventArgs<int, int> e) {
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[8221] | 167 | if (Evaluator is ITSPCoordinatesPathEvaluator) {
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| 168 | ClearDistanceMatrix();
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| 169 | }
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[2975] | 170 | }
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| 171 | private void Coordinates_Reset(object sender, EventArgs e) {
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[8221] | 172 | if (Evaluator is ITSPCoordinatesPathEvaluator) {
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| 173 | ParameterizeSolutionCreator();
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| 174 | ClearDistanceMatrix();
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| 175 | }
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[2975] | 176 | }
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| 177 | private void SolutionCreator_PermutationParameter_ActualNameChanged(object sender, EventArgs e) {
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| 178 | ParameterizeEvaluator();
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[4623] | 179 | ParameterizeAnalyzers();
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[2975] | 180 | ParameterizeOperators();
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| 181 | }
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[3139] | 182 | private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
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[4623] | 183 | ParameterizeAnalyzers();
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[3139] | 184 | }
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[2975] | 185 | #endregion
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[2865] | 186 |
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[2975] | 187 | #region Helpers
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[2986] | 188 | [StorableHook(HookType.AfterDeserialization)]
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[4722] | 189 | private void AfterDeserialization() {
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[4118] | 190 | // BackwardsCompatibility3.3
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| 191 | #region Backwards compatible code (remove with 3.4)
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[4825] | 192 | OptionalValueParameter<DoubleMatrix> oldDistanceMatrixParameter = Parameters["DistanceMatrix"] as OptionalValueParameter<DoubleMatrix>;
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| 193 | if (oldDistanceMatrixParameter != null) {
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| 194 | Parameters.Remove(oldDistanceMatrixParameter);
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| 195 | Parameters.Add(new OptionalValueParameter<DistanceMatrix>("DistanceMatrix", "The matrix which contains the distances between the cities."));
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| 196 | DistanceMatrixParameter.GetsCollected = oldDistanceMatrixParameter.GetsCollected;
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| 197 | DistanceMatrixParameter.ReactOnValueToStringChangedAndValueItemImageChanged = false;
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| 198 | if (oldDistanceMatrixParameter.Value != null) {
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| 199 | DoubleMatrix oldDM = oldDistanceMatrixParameter.Value;
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| 200 | DistanceMatrix newDM = new DistanceMatrix(oldDM.Rows, oldDM.Columns, oldDM.ColumnNames, oldDM.RowNames);
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| 201 | newDM.SortableView = oldDM.SortableView;
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| 202 | for (int i = 0; i < newDM.Rows; i++)
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| 203 | for (int j = 0; j < newDM.Columns; j++)
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| 204 | newDM[i, j] = oldDM[i, j];
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| 205 | DistanceMatrixParameter.Value = (DistanceMatrix)newDM.AsReadOnly();
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| 206 | }
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| 207 | }
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| 208 |
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[7621] | 209 | ValueParameter<DoubleMatrix> oldCoordinates = (Parameters["Coordinates"] as ValueParameter<DoubleMatrix>);
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| 210 | if (oldCoordinates != null) {
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| 211 | Parameters.Remove(oldCoordinates);
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| 212 | Parameters.Add(new OptionalValueParameter<DoubleMatrix>("Coordinates", "The x- and y-Coordinates of the cities.", oldCoordinates.Value, oldCoordinates.GetsCollected));
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| 213 | }
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| 214 |
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[6938] | 215 | if (Operators.Count == 0) InitializeOperators();
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[4118] | 216 | #endregion
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[7351] | 217 | RegisterEventHandlers();
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[4118] | 218 | }
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| 219 |
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[7351] | 220 | private void RegisterEventHandlers() {
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[2975] | 221 | CoordinatesParameter.ValueChanged += new EventHandler(CoordinatesParameter_ValueChanged);
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[7621] | 222 | if (Coordinates != null) {
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| 223 | Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(Coordinates_ItemChanged);
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| 224 | Coordinates.Reset += new EventHandler(Coordinates_Reset);
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| 225 | }
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[2975] | 226 | SolutionCreator.PermutationParameter.ActualNameChanged += new EventHandler(SolutionCreator_PermutationParameter_ActualNameChanged);
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[3139] | 227 | Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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[2865] | 228 | }
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[3139] | 229 |
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[3099] | 230 | private void InitializeOperators() {
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[8334] | 231 | Operators.Add(new TSPImprovementOperator());
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| 232 | Operators.Add(new TSPMultipleGuidesPathRelinker());
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| 233 | Operators.Add(new TSPPathRelinker());
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| 234 | Operators.Add(new TSPSimultaneousPathRelinker());
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[15069] | 235 |
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| 236 | Operators.Add(new HammingSimilarityCalculator());
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[12126] | 237 | Operators.Add(new QualitySimilarityCalculator());
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[15069] | 238 | Operators.Add(new PopulationSimilarityAnalyzer(Operators.OfType<ISolutionSimilarityCalculator>()));
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[8334] | 239 |
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[6938] | 240 | Operators.Add(new BestTSPSolutionAnalyzer());
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| 241 | Operators.Add(new TSPAlleleFrequencyAnalyzer());
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[4623] | 242 | ParameterizeAnalyzers();
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[7658] | 243 | var operators = new HashSet<IPermutationOperator>(new IPermutationOperator[] {
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[7626] | 244 | new OrderCrossover2(),
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| 245 | new InversionManipulator(),
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| 246 | new StochasticInversionMultiMoveGenerator()
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[7658] | 247 | }, new TypeEqualityComparer<IPermutationOperator>());
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| 248 | foreach (var op in ApplicationManager.Manager.GetInstances<IPermutationOperator>())
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| 249 | operators.Add(op);
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| 250 | Operators.AddRange(operators);
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[3199] | 251 | ParameterizeOperators();
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[3209] | 252 | UpdateMoveEvaluators();
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[3099] | 253 | }
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[3209] | 254 | private void UpdateMoveEvaluators() {
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[6938] | 255 | Operators.RemoveAll(x => x is ISingleObjectiveMoveEvaluator);
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[12978] | 256 | foreach (var op in ApplicationManager.Manager.GetInstances<ITSPMoveEvaluator>())
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[3303] | 257 | if (op.EvaluatorType == Evaluator.GetType()) {
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[6938] | 258 | Operators.Add(op);
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[3303] | 259 | }
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| 260 | ParameterizeOperators();
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| 261 | OnOperatorsChanged();
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[3209] | 262 | }
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[2975] | 263 | private void ParameterizeSolutionCreator() {
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[7621] | 264 | if (Evaluator is ITSPDistanceMatrixEvaluator && DistanceMatrix != null)
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| 265 | SolutionCreator.LengthParameter.Value = new IntValue(DistanceMatrix.Rows);
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| 266 | else if (Evaluator is ITSPCoordinatesPathEvaluator && Coordinates != null)
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| 267 | SolutionCreator.LengthParameter.Value = new IntValue(Coordinates.Rows);
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[8208] | 268 | else {
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| 269 | SolutionCreator.LengthParameter.Value = null;
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| 270 | string error = "The given problem does not support the selected evaluator.";
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| 271 | if (Evaluator is ITSPDistanceMatrixEvaluator)
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| 272 | error += Environment.NewLine + "Please review that the " + DistanceMatrixParameter.Name + " parameter is defined or choose another evaluator.";
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| 273 | else error += Environment.NewLine + "Please review that the " + CoordinatesParameter.Name + " parameter is defined or choose another evaluator.";
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| 274 | PluginInfrastructure.ErrorHandling.ShowErrorDialog(error, null);
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| 275 | }
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[7621] | 276 | SolutionCreator.LengthParameter.Hidden = SolutionCreator.LengthParameter.Value != null;
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[3231] | 277 | SolutionCreator.PermutationTypeParameter.Value = new PermutationType(PermutationTypes.RelativeUndirected);
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[6051] | 278 | SolutionCreator.PermutationTypeParameter.Hidden = true;
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[2865] | 279 | }
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[2975] | 280 | private void ParameterizeEvaluator() {
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[6051] | 281 | if (Evaluator is ITSPPathEvaluator) {
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| 282 | ITSPPathEvaluator evaluator = (ITSPPathEvaluator)Evaluator;
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| 283 | evaluator.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 284 | evaluator.PermutationParameter.Hidden = true;
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| 285 | }
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[3066] | 286 | if (Evaluator is ITSPCoordinatesPathEvaluator) {
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| 287 | ITSPCoordinatesPathEvaluator evaluator = (ITSPCoordinatesPathEvaluator)Evaluator;
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| 288 | evaluator.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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[6051] | 289 | evaluator.CoordinatesParameter.Hidden = true;
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[3066] | 290 | evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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[6051] | 291 | evaluator.DistanceMatrixParameter.Hidden = true;
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[3066] | 292 | evaluator.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
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[6051] | 293 | evaluator.UseDistanceMatrixParameter.Hidden = true;
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[3066] | 294 | }
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[7558] | 295 | if (Evaluator is ITSPDistanceMatrixEvaluator) {
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| 296 | var evaluator = (ITSPDistanceMatrixEvaluator)Evaluator;
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| 297 | evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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| 298 | evaluator.DistanceMatrixParameter.Hidden = true;
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| 299 | }
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[2865] | 300 | }
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[4623] | 301 | private void ParameterizeAnalyzers() {
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[4641] | 302 | if (BestTSPSolutionAnalyzer != null) {
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| 303 | BestTSPSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
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| 304 | BestTSPSolutionAnalyzer.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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| 305 | BestTSPSolutionAnalyzer.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 306 | BestTSPSolutionAnalyzer.ResultsParameter.ActualName = "Results";
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| 307 | BestTSPSolutionAnalyzer.BestKnownQualityParameter.ActualName = BestKnownQualityParameter.Name;
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| 308 | BestTSPSolutionAnalyzer.BestKnownSolutionParameter.ActualName = BestKnownSolutionParameter.Name;
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| 309 | BestTSPSolutionAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
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| 310 | }
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[4623] | 311 |
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[4641] | 312 | if (TSPAlleleFrequencyAnalyzer != null) {
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| 313 | TSPAlleleFrequencyAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
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| 314 | TSPAlleleFrequencyAnalyzer.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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[4866] | 315 | TSPAlleleFrequencyAnalyzer.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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[4641] | 316 | TSPAlleleFrequencyAnalyzer.SolutionParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 317 | TSPAlleleFrequencyAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
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| 318 | TSPAlleleFrequencyAnalyzer.BestKnownSolutionParameter.ActualName = BestKnownSolutionParameter.Name;
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| 319 | TSPAlleleFrequencyAnalyzer.ResultsParameter.ActualName = "Results";
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| 320 | }
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[3107] | 321 | }
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[2975] | 322 | private void ParameterizeOperators() {
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| 323 | foreach (IPermutationCrossover op in Operators.OfType<IPermutationCrossover>()) {
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| 324 | op.ParentsParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[6051] | 325 | op.ParentsParameter.Hidden = true;
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[2975] | 326 | op.ChildParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[6051] | 327 | op.ChildParameter.Hidden = true;
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[2975] | 328 | }
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| 329 | foreach (IPermutationManipulator op in Operators.OfType<IPermutationManipulator>()) {
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| 330 | op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[6051] | 331 | op.PermutationParameter.Hidden = true;
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[2975] | 332 | }
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[3074] | 333 | foreach (IPermutationMoveOperator op in Operators.OfType<IPermutationMoveOperator>()) {
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| 334 | op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[6051] | 335 | op.PermutationParameter.Hidden = true;
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[3074] | 336 | }
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| 337 | foreach (ITSPPathMoveEvaluator op in Operators.OfType<ITSPPathMoveEvaluator>()) {
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| 338 | op.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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[6051] | 339 | op.CoordinatesParameter.Hidden = true;
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[3074] | 340 | op.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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[6051] | 341 | op.DistanceMatrixParameter.Hidden = true;
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[3074] | 342 | op.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
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[6051] | 343 | op.UseDistanceMatrixParameter.Hidden = true;
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[3209] | 344 | op.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
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[6051] | 345 | op.QualityParameter.Hidden = true;
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[3209] | 346 | op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[6051] | 347 | op.PermutationParameter.Hidden = true;
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[3074] | 348 | }
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[6051] | 349 | foreach (IPermutationMultiNeighborhoodShakingOperator op in Operators.OfType<IPermutationMultiNeighborhoodShakingOperator>()) {
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[6042] | 350 | op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[6051] | 351 | op.PermutationParameter.Hidden = true;
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| 352 | }
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[8334] | 353 | foreach (ISingleObjectiveImprovementOperator op in Operators.OfType<ISingleObjectiveImprovementOperator>()) {
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| 354 | op.SolutionParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 355 | op.SolutionParameter.Hidden = true;
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| 356 | }
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| 357 | foreach (ISingleObjectivePathRelinker op in Operators.OfType<ISingleObjectivePathRelinker>()) {
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| 358 | op.ParentsParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 359 | op.ParentsParameter.Hidden = true;
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| 360 | }
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[12126] | 361 | foreach (ISolutionSimilarityCalculator op in Operators.OfType<ISolutionSimilarityCalculator>()) {
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[8334] | 362 | op.SolutionVariableName = SolutionCreator.PermutationParameter.ActualName;
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| 363 | op.QualityVariableName = Evaluator.QualityParameter.ActualName;
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| 364 | }
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[2975] | 365 | }
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[3074] | 366 |
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[3066] | 367 | private void ClearDistanceMatrix() {
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[8221] | 368 | DistanceMatrixParameter.Value = null;
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[3066] | 369 | }
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[2975] | 370 | #endregion
|
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[4098] | 371 |
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[7558] | 372 | public void Load(TSPData data) {
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| 373 | if (data.Coordinates == null && data.Distances == null)
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[7621] | 374 | throw new System.IO.InvalidDataException("The given instance specifies neither coordinates nor distances!");
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[7872] | 375 | if (data.Dimension > DistanceMatrixSizeLimit && (data.DistanceMeasure == DistanceMeasure.Att
|
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| 376 | || data.DistanceMeasure == DistanceMeasure.Manhattan
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[9848] | 377 | || data.DistanceMeasure == DistanceMeasure.Maximum))
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[7558] | 378 | throw new System.IO.InvalidDataException("The given instance uses an unsupported distance measure and is too large for using a distance matrix.");
|
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| 379 | if (data.Coordinates != null && data.Coordinates.GetLength(1) != 2)
|
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| 380 | throw new System.IO.InvalidDataException("The coordinates of the given instance are not in the right format, there need to be one row for each customer and two columns for the x and y coordinates.");
|
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| 381 |
|
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| 382 | Name = data.Name;
|
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| 383 | Description = data.Description;
|
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| 384 |
|
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[8221] | 385 | bool clearCoordinates = false, clearDistanceMatrix = false;
|
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[7558] | 386 | if (data.Coordinates != null && data.Coordinates.GetLength(0) > 0)
|
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| 387 | Coordinates = new DoubleMatrix(data.Coordinates);
|
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[8221] | 388 | else clearCoordinates = true;
|
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[7558] | 389 |
|
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| 390 | TSPEvaluator evaluator;
|
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[7872] | 391 | if (data.DistanceMeasure == DistanceMeasure.Att
|
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| 392 | || data.DistanceMeasure == DistanceMeasure.Manhattan
|
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[9848] | 393 | || data.DistanceMeasure == DistanceMeasure.Maximum) {
|
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[7558] | 394 | evaluator = new TSPDistanceMatrixEvaluator();
|
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| 395 | UseDistanceMatrix = new BoolValue(true);
|
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| 396 | DistanceMatrix = new DistanceMatrix(data.GetDistanceMatrix());
|
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[7872] | 397 | } else if (data.DistanceMeasure == DistanceMeasure.Direct && data.Distances != null) {
|
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[7558] | 398 | evaluator = new TSPDistanceMatrixEvaluator();
|
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| 399 | UseDistanceMatrix = new BoolValue(true);
|
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| 400 | DistanceMatrix = new DistanceMatrix(data.Distances);
|
---|
| 401 | } else {
|
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[8221] | 402 | clearDistanceMatrix = true;
|
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[7558] | 403 | UseDistanceMatrix = new BoolValue(data.Dimension <= DistanceMatrixSizeLimit);
|
---|
| 404 | switch (data.DistanceMeasure) {
|
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[7872] | 405 | case DistanceMeasure.Euclidean:
|
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[7558] | 406 | evaluator = new TSPEuclideanPathEvaluator();
|
---|
| 407 | break;
|
---|
[7872] | 408 | case DistanceMeasure.RoundedEuclidean:
|
---|
[7558] | 409 | evaluator = new TSPRoundedEuclideanPathEvaluator();
|
---|
| 410 | break;
|
---|
[9848] | 411 | case DistanceMeasure.UpperEuclidean:
|
---|
| 412 | evaluator = new TSPUpperEuclideanPathEvaluator();
|
---|
| 413 | break;
|
---|
[7872] | 414 | case DistanceMeasure.Geo:
|
---|
[7558] | 415 | evaluator = new TSPGeoPathEvaluator();
|
---|
| 416 | break;
|
---|
| 417 | default:
|
---|
| 418 | throw new InvalidDataException("An unknown distance measure is given in the instance!");
|
---|
| 419 | }
|
---|
[4098] | 420 | }
|
---|
[7558] | 421 | evaluator.QualityParameter.ActualName = "TSPTourLength";
|
---|
| 422 | Evaluator = evaluator;
|
---|
| 423 |
|
---|
[8221] | 424 | // reset them after assigning the evaluator
|
---|
| 425 | if (clearCoordinates) Coordinates = null;
|
---|
| 426 | if (clearDistanceMatrix) DistanceMatrix = null;
|
---|
| 427 |
|
---|
[7558] | 428 | BestKnownSolution = null;
|
---|
[4098] | 429 | BestKnownQuality = null;
|
---|
| 430 |
|
---|
[7558] | 431 | if (data.BestKnownTour != null) {
|
---|
| 432 | try {
|
---|
| 433 | EvaluateAndLoadTour(data.BestKnownTour);
|
---|
[12978] | 434 | } catch (InvalidOperationException) {
|
---|
[7558] | 435 | if (data.BestKnownQuality.HasValue)
|
---|
| 436 | BestKnownQuality = new DoubleValue(data.BestKnownQuality.Value);
|
---|
| 437 | }
|
---|
| 438 | } else if (data.BestKnownQuality.HasValue) {
|
---|
| 439 | BestKnownQuality = new DoubleValue(data.BestKnownQuality.Value);
|
---|
[4098] | 440 | }
|
---|
| 441 | OnReset();
|
---|
| 442 | }
|
---|
[7558] | 443 |
|
---|
| 444 | public void EvaluateAndLoadTour(int[] tour) {
|
---|
| 445 | var route = new Permutation(PermutationTypes.RelativeUndirected, tour);
|
---|
| 446 | BestKnownSolution = route;
|
---|
| 447 |
|
---|
| 448 | double quality;
|
---|
[7621] | 449 | if (Evaluator is ITSPDistanceMatrixEvaluator) {
|
---|
[7558] | 450 | quality = TSPDistanceMatrixEvaluator.Apply(DistanceMatrix, route);
|
---|
[7621] | 451 | } else if (Evaluator is ITSPCoordinatesPathEvaluator) {
|
---|
[7558] | 452 | quality = TSPCoordinatesPathEvaluator.Apply((TSPCoordinatesPathEvaluator)Evaluator, Coordinates, route);
|
---|
| 453 | } else {
|
---|
| 454 | throw new InvalidOperationException("Cannot calculate solution quality, evaluator type is unknown.");
|
---|
| 455 | }
|
---|
| 456 | BestKnownQuality = new DoubleValue(quality);
|
---|
[4098] | 457 | }
|
---|
[2796] | 458 | }
|
---|
| 459 | }
|
---|