[2796] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 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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[2865] | 24 | using System.Drawing;
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[3153] | 25 | using System.IO;
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[2865] | 26 | using System.Linq;
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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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[2805] | 32 | using HeuristicLab.Parameters;
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[2796] | 33 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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[2865] | 34 | using HeuristicLab.PluginInfrastructure;
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[2796] | 35 |
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[3158] | 36 | namespace HeuristicLab.Problems.TravelingSalesman {
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[3159] | 37 | [Item("Traveling Salesman Problem", "Represents a symmetric Traveling Salesman Problem.")]
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[2796] | 38 | [Creatable("Problems")]
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[3017] | 39 | [StorableClass]
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[3159] | 40 | public sealed class TravelingSalesmanProblem : ParameterizedNamedItem, ISingleObjectiveProblem {
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[2865] | 41 | public override Image ItemImage {
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| 42 | get { return HeuristicLab.Common.Resources.VS2008ImageLibrary.Type; }
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[2805] | 43 | }
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| 44 |
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[2975] | 45 | #region Parameter Properties
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[3048] | 46 | public ValueParameter<BoolValue> MaximizationParameter {
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| 47 | get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
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[2805] | 48 | }
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[2975] | 49 | IParameter ISingleObjectiveProblem.MaximizationParameter {
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| 50 | get { return MaximizationParameter; }
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[2865] | 51 | }
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[3048] | 52 | public ValueParameter<DoubleMatrix> CoordinatesParameter {
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| 53 | get { return (ValueParameter<DoubleMatrix>)Parameters["Coordinates"]; }
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[2865] | 54 | }
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[3066] | 55 | public OptionalValueParameter<DoubleMatrix> DistanceMatrixParameter {
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| 56 | get { return (OptionalValueParameter<DoubleMatrix>)Parameters["DistanceMatrix"]; }
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| 57 | }
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| 58 | public ValueParameter<BoolValue> UseDistanceMatrixParameter {
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| 59 | get { return (ValueParameter<BoolValue>)Parameters["UseDistanceMatrix"]; }
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| 60 | }
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[2975] | 61 | public ValueParameter<IPermutationCreator> SolutionCreatorParameter {
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| 62 | get { return (ValueParameter<IPermutationCreator>)Parameters["SolutionCreator"]; }
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[2865] | 63 | }
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[2975] | 64 | IParameter IProblem.SolutionCreatorParameter {
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| 65 | get { return SolutionCreatorParameter; }
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[2865] | 66 | }
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[2975] | 67 | public ValueParameter<ITSPEvaluator> EvaluatorParameter {
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| 68 | get { return (ValueParameter<ITSPEvaluator>)Parameters["Evaluator"]; }
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| 69 | }
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| 70 | IParameter IProblem.EvaluatorParameter {
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| 71 | get { return EvaluatorParameter; }
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| 72 | }
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[3048] | 73 | public OptionalValueParameter<DoubleValue> BestKnownQualityParameter {
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| 74 | get { return (OptionalValueParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
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[2975] | 75 | }
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[3080] | 76 | IParameter ISingleObjectiveProblem.BestKnownQualityParameter {
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| 77 | get { return BestKnownQualityParameter; }
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| 78 | }
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[3151] | 79 | public OptionalValueParameter<Permutation> BestKnownSolutionParameter {
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| 80 | get { return (OptionalValueParameter<Permutation>)Parameters["BestKnownSolution"]; }
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| 81 | }
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[2975] | 82 | #endregion
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[2805] | 83 |
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[2975] | 84 | #region Properties
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[3048] | 85 | public DoubleMatrix Coordinates {
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[2975] | 86 | get { return CoordinatesParameter.Value; }
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| 87 | set { CoordinatesParameter.Value = value; }
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[2865] | 88 | }
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[3066] | 89 | public DoubleMatrix DistanceMatrix {
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| 90 | get { return DistanceMatrixParameter.Value; }
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| 91 | set { DistanceMatrixParameter.Value = value; }
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| 92 | }
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| 93 | public BoolValue UseDistanceMatrix {
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| 94 | get { return UseDistanceMatrixParameter.Value; }
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| 95 | set { UseDistanceMatrixParameter.Value = value; }
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| 96 | }
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[2975] | 97 | public IPermutationCreator SolutionCreator {
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[2865] | 98 | get { return SolutionCreatorParameter.Value; }
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[2975] | 99 | set { SolutionCreatorParameter.Value = value; }
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[2865] | 100 | }
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[2975] | 101 | ISolutionCreator IProblem.SolutionCreator {
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| 102 | get { return SolutionCreatorParameter.Value; }
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| 103 | }
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| 104 | public ITSPEvaluator Evaluator {
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[2865] | 105 | get { return EvaluatorParameter.Value; }
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[2975] | 106 | set { EvaluatorParameter.Value = value; }
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[2865] | 107 | }
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[2975] | 108 | ISingleObjectiveEvaluator ISingleObjectiveProblem.Evaluator {
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| 109 | get { return EvaluatorParameter.Value; }
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| 110 | }
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[2865] | 111 | IEvaluator IProblem.Evaluator {
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| 112 | get { return EvaluatorParameter.Value; }
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| 113 | }
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[3048] | 114 | public DoubleValue BestKnownQuality {
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[2975] | 115 | get { return BestKnownQualityParameter.Value; }
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| 116 | set { BestKnownQualityParameter.Value = value; }
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| 117 | }
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[3151] | 118 | public Permutation BestKnownSolution {
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| 119 | get { return BestKnownSolutionParameter.Value; }
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| 120 | set { BestKnownSolutionParameter.Value = value; }
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| 121 | }
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[3616] | 122 | private List<IOperator> operators;
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[2975] | 123 | public IEnumerable<IOperator> Operators {
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[3616] | 124 | get { return operators; }
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[2865] | 125 | }
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[3663] | 126 | private BestTSPSolutionAnalyzer BestTSPSolutionAnalyzer {
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| 127 | get { return operators.OfType<BestTSPSolutionAnalyzer>().FirstOrDefault(); }
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[3616] | 128 | }
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[2975] | 129 | #endregion
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[2865] | 130 |
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[3159] | 131 | public TravelingSalesmanProblem()
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[2796] | 132 | : base() {
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[2891] | 133 | RandomPermutationCreator creator = new RandomPermutationCreator();
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| 134 | TSPRoundedEuclideanPathEvaluator evaluator = new TSPRoundedEuclideanPathEvaluator();
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| 135 |
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[3048] | 136 | Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to false as the Traveling Salesman Problem is a minimization problem.", new BoolValue(false)));
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[3504] | 137 | Parameters.Add(new ValueParameter<DoubleMatrix>("Coordinates", "The x- and y-Coordinates of the cities."));
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[3066] | 138 | Parameters.Add(new OptionalValueParameter<DoubleMatrix>("DistanceMatrix", "The matrix which contains the distances between the cities."));
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| 139 | Parameters.Add(new ValueParameter<BoolValue>("UseDistanceMatrix", "True if a distance matrix should be calculated and used for evaluation, otherwise false.", new BoolValue(true)));
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[2891] | 140 | Parameters.Add(new ValueParameter<IPermutationCreator>("SolutionCreator", "The operator which should be used to create new TSP solutions.", creator));
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| 141 | Parameters.Add(new ValueParameter<ITSPEvaluator>("Evaluator", "The operator which should be used to evaluate TSP solutions.", evaluator));
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[3048] | 142 | Parameters.Add(new OptionalValueParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this TSP instance."));
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[3151] | 143 | Parameters.Add(new OptionalValueParameter<Permutation>("BestKnownSolution", "The best known solution of this TSP instance."));
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[2865] | 144 |
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[3504] | 145 | Coordinates = new DoubleMatrix(new double[,] {
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| 146 | { 100, 100 }, { 100, 200 }, { 100, 300 }, { 100, 400 },
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| 147 | { 200, 100 }, { 200, 200 }, { 200, 300 }, { 200, 400 },
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| 148 | { 300, 100 }, { 300, 200 }, { 300, 300 }, { 300, 400 },
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| 149 | { 400, 100 }, { 400, 200 }, { 400, 300 }, { 400, 400 }
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| 150 | });
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| 151 |
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[2865] | 152 | creator.PermutationParameter.ActualName = "TSPTour";
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| 153 | evaluator.QualityParameter.ActualName = "TSPTourLength";
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[2975] | 154 | ParameterizeSolutionCreator();
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| 155 | ParameterizeEvaluator();
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[2865] | 156 |
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[2986] | 157 | Initialize();
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[2975] | 158 | }
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[2986] | 159 | [StorableConstructor]
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[3159] | 160 | private TravelingSalesmanProblem(bool deserializing) : base() { }
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[2891] | 161 |
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[2975] | 162 | public override IDeepCloneable Clone(Cloner cloner) {
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[3159] | 163 | TravelingSalesmanProblem clone = (TravelingSalesmanProblem)base.Clone(cloner);
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[3430] | 164 | clone.DistanceMatrixParameter.Value = DistanceMatrixParameter.Value;
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[2986] | 165 | clone.Initialize();
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[2975] | 166 | return clone;
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[2805] | 167 | }
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[2796] | 168 |
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[3151] | 169 | public void ImportFromTSPLIB(string tspFileName, string optimalTourFileName) {
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| 170 | TSPLIBParser tspParser = new TSPLIBParser(tspFileName);
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| 171 | tspParser.Parse();
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| 172 | Name = tspParser.Name + " TSP (imported from TSPLIB)";
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| 173 | if (!string.IsNullOrEmpty(tspParser.Comment)) Description = tspParser.Comment;
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| 174 | Coordinates = new DoubleMatrix(tspParser.Vertices);
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[3155] | 175 | if (tspParser.WeightType == TSPLIBParser.TSPLIBEdgeWeightType.EUC_2D) {
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| 176 | TSPRoundedEuclideanPathEvaluator evaluator = new TSPRoundedEuclideanPathEvaluator();
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| 177 | evaluator.QualityParameter.ActualName = "TSPTourLength";
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| 178 | Evaluator = evaluator;
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| 179 | } else if (tspParser.WeightType == TSPLIBParser.TSPLIBEdgeWeightType.GEO) {
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| 180 | TSPGeoPathEvaluator evaluator = new TSPGeoPathEvaluator();
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| 181 | evaluator.QualityParameter.ActualName = "TSPTourLength";
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| 182 | Evaluator = evaluator;
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| 183 | }
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[3151] | 184 | BestKnownQuality = null;
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[3153] | 185 | BestKnownSolution = null;
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[3155] | 186 |
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[3151] | 187 | if (!string.IsNullOrEmpty(optimalTourFileName)) {
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| 188 | TSPLIBTourParser tourParser = new TSPLIBTourParser(optimalTourFileName);
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| 189 | tourParser.Parse();
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[3153] | 190 | if (tourParser.Tour.Length != Coordinates.Rows) throw new InvalidDataException("Length of optimal tour is not equal to number of cities.");
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[3231] | 191 | BestKnownSolution = new Permutation(PermutationTypes.RelativeUndirected, tourParser.Tour);
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[3151] | 192 | }
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[3739] | 193 | OnReset();
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[2796] | 194 | }
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[3151] | 195 | public void ImportFromTSPLIB(string tspFileName, string optimalTourFileName, double bestKnownQuality) {
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| 196 | ImportFromTSPLIB(tspFileName, optimalTourFileName);
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| 197 | BestKnownQuality = new DoubleValue(bestKnownQuality);
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| 198 | }
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[2865] | 199 |
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[2975] | 200 | #region Events
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| 201 | public event EventHandler SolutionCreatorChanged;
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| 202 | private void OnSolutionCreatorChanged() {
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[3739] | 203 | EventHandler handler = SolutionCreatorChanged;
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| 204 | if (handler != null) handler(this, EventArgs.Empty);
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[2865] | 205 | }
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[2975] | 206 | public event EventHandler EvaluatorChanged;
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| 207 | private void OnEvaluatorChanged() {
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[3739] | 208 | EventHandler handler = EvaluatorChanged;
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| 209 | if (handler != null) handler(this, EventArgs.Empty);
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[2975] | 210 | }
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| 211 | public event EventHandler OperatorsChanged;
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| 212 | private void OnOperatorsChanged() {
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[3739] | 213 | EventHandler handler = OperatorsChanged;
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| 214 | if (handler != null) handler(this, EventArgs.Empty);
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[2975] | 215 | }
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[3739] | 216 | public event EventHandler Reset;
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| 217 | private void OnReset() {
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| 218 | EventHandler handler = Reset;
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| 219 | if (handler != null) handler(this, EventArgs.Empty);
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| 220 | }
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[2975] | 221 |
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| 222 | private void CoordinatesParameter_ValueChanged(object sender, EventArgs e) {
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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 | ParameterizeSolutionCreator();
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[3066] | 226 | ClearDistanceMatrix();
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[2975] | 227 | }
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| 228 | private void Coordinates_ItemChanged(object sender, EventArgs<int, int> e) {
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[3066] | 229 | ClearDistanceMatrix();
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[2975] | 230 | }
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| 231 | private void Coordinates_Reset(object sender, EventArgs e) {
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| 232 | ParameterizeSolutionCreator();
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[3066] | 233 | ClearDistanceMatrix();
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[2975] | 234 | }
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[2865] | 235 | private void SolutionCreatorParameter_ValueChanged(object sender, EventArgs e) {
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[2975] | 236 | SolutionCreator.PermutationParameter.ActualNameChanged += new EventHandler(SolutionCreator_PermutationParameter_ActualNameChanged);
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| 237 | ParameterizeSolutionCreator();
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| 238 | ParameterizeEvaluator();
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[3662] | 239 | ParameterizeAnalyzer();
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[2975] | 240 | ParameterizeOperators();
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[2865] | 241 | OnSolutionCreatorChanged();
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| 242 | }
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[2975] | 243 | private void SolutionCreator_PermutationParameter_ActualNameChanged(object sender, EventArgs e) {
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| 244 | ParameterizeEvaluator();
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[3662] | 245 | ParameterizeAnalyzer();
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[2975] | 246 | ParameterizeOperators();
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| 247 | }
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[2865] | 248 | private void EvaluatorParameter_ValueChanged(object sender, EventArgs e) {
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[3139] | 249 | Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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[2975] | 250 | ParameterizeEvaluator();
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[3209] | 251 | UpdateMoveEvaluators();
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[3662] | 252 | ParameterizeAnalyzer();
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[3066] | 253 | ClearDistanceMatrix();
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[2865] | 254 | OnEvaluatorChanged();
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| 255 | }
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[3139] | 256 | private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
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[3662] | 257 | ParameterizeAnalyzer();
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[3139] | 258 | }
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[3232] | 259 | private void MoveGenerator_InversionMoveParameter_ActualNameChanged(object sender, EventArgs e) {
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| 260 | string name = ((ILookupParameter<InversionMove>)sender).ActualName;
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| 261 | foreach (IPermutationInversionMoveOperator op in Operators.OfType<IPermutationInversionMoveOperator>()) {
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| 262 | op.InversionMoveParameter.ActualName = name;
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[3074] | 263 | }
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| 264 | }
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[3232] | 265 | private void MoveGenerator_TranslocationMoveParameter_ActualNameChanged(object sender, EventArgs e) {
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| 266 | string name = ((ILookupParameter<TranslocationMove>)sender).ActualName;
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| 267 | foreach (IPermutationTranslocationMoveOperator op in Operators.OfType<IPermutationTranslocationMoveOperator>()) {
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| 268 | op.TranslocationMoveParameter.ActualName = name;
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[3074] | 269 | }
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| 270 | }
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[2975] | 271 | #endregion
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[2865] | 272 |
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[2975] | 273 | #region Helpers
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[2986] | 274 | [StorableHook(HookType.AfterDeserialization)]
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| 275 | private void Initialize() {
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| 276 | InitializeOperators();
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[2975] | 277 | CoordinatesParameter.ValueChanged += new EventHandler(CoordinatesParameter_ValueChanged);
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| 278 | Coordinates.ItemChanged += new EventHandler<EventArgs<int, int>>(Coordinates_ItemChanged);
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| 279 | Coordinates.Reset += new EventHandler(Coordinates_Reset);
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| 280 | SolutionCreatorParameter.ValueChanged += new EventHandler(SolutionCreatorParameter_ValueChanged);
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| 281 | SolutionCreator.PermutationParameter.ActualNameChanged += new EventHandler(SolutionCreator_PermutationParameter_ActualNameChanged);
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| 282 | EvaluatorParameter.ValueChanged += new EventHandler(EvaluatorParameter_ValueChanged);
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[3139] | 283 | Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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[2865] | 284 | }
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[3139] | 285 |
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[3099] | 286 | private void InitializeOperators() {
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[3616] | 287 | operators = new List<IOperator>();
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[3663] | 288 | operators.Add(new BestTSPSolutionAnalyzer());
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[3662] | 289 | ParameterizeAnalyzer();
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[3616] | 290 | operators.AddRange(ApplicationManager.Manager.GetInstances<IPermutationOperator>().Cast<IOperator>());
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[3199] | 291 | ParameterizeOperators();
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[3209] | 292 | UpdateMoveEvaluators();
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[3099] | 293 | InitializeMoveGenerators();
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| 294 | }
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| 295 | private void InitializeMoveGenerators() {
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[3232] | 296 | foreach (IPermutationInversionMoveOperator op in Operators.OfType<IPermutationInversionMoveOperator>()) {
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[3099] | 297 | if (op is IMoveGenerator) {
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[3232] | 298 | op.InversionMoveParameter.ActualNameChanged += new EventHandler(MoveGenerator_InversionMoveParameter_ActualNameChanged);
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[3099] | 299 | }
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| 300 | }
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[3232] | 301 | foreach (IPermutationTranslocationMoveOperator op in Operators.OfType<IPermutationTranslocationMoveOperator>()) {
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[3099] | 302 | if (op is IMoveGenerator) {
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[3232] | 303 | op.TranslocationMoveParameter.ActualNameChanged += new EventHandler(MoveGenerator_TranslocationMoveParameter_ActualNameChanged);
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[3099] | 304 | }
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| 305 | }
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| 306 | }
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[3209] | 307 | private void UpdateMoveEvaluators() {
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[3303] | 308 | foreach (ITSPPathMoveEvaluator op in Operators.OfType<ITSPPathMoveEvaluator>().ToList())
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| 309 | operators.Remove(op);
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| 310 | foreach (ITSPPathMoveEvaluator op in ApplicationManager.Manager.GetInstances<ITSPPathMoveEvaluator>())
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| 311 | if (op.EvaluatorType == Evaluator.GetType()) {
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| 312 | operators.Add(op);
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| 313 | }
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| 314 | ParameterizeOperators();
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| 315 | OnOperatorsChanged();
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[3209] | 316 | }
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[2975] | 317 | private void ParameterizeSolutionCreator() {
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[3048] | 318 | SolutionCreator.LengthParameter.Value = new IntValue(Coordinates.Rows);
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[3231] | 319 | SolutionCreator.PermutationTypeParameter.Value = new PermutationType(PermutationTypes.RelativeUndirected);
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[2865] | 320 | }
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[2975] | 321 | private void ParameterizeEvaluator() {
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| 322 | if (Evaluator is ITSPPathEvaluator)
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| 323 | ((ITSPPathEvaluator)Evaluator).PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[3066] | 324 | if (Evaluator is ITSPCoordinatesPathEvaluator) {
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| 325 | ITSPCoordinatesPathEvaluator evaluator = (ITSPCoordinatesPathEvaluator)Evaluator;
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| 326 | evaluator.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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| 327 | evaluator.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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| 328 | evaluator.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
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| 329 | }
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[2865] | 330 | }
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[3662] | 331 | private void ParameterizeAnalyzer() {
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| 332 | BestTSPSolutionAnalyzer.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
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| 333 | BestTSPSolutionAnalyzer.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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| 334 | BestTSPSolutionAnalyzer.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 335 | BestTSPSolutionAnalyzer.ResultsParameter.ActualName = "Results";
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[3789] | 336 | BestTSPSolutionAnalyzer.BestKnownQualityParameter.ActualName = BestKnownQualityParameter.Name;
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| 337 | BestTSPSolutionAnalyzer.BestKnownSolutionParameter.ActualName = BestKnownSolutionParameter.Name;
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| 338 | BestTSPSolutionAnalyzer.MaximizationParameter.ActualName = MaximizationParameter.Name;
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[3107] | 339 | }
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[2975] | 340 | private void ParameterizeOperators() {
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| 341 | foreach (IPermutationCrossover op in Operators.OfType<IPermutationCrossover>()) {
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| 342 | op.ParentsParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 343 | op.ChildParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 344 | }
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| 345 | foreach (IPermutationManipulator op in Operators.OfType<IPermutationManipulator>()) {
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| 346 | op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 347 | }
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[3074] | 348 | foreach (IPermutationMoveOperator op in Operators.OfType<IPermutationMoveOperator>()) {
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| 349 | op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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| 350 | }
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| 351 | foreach (ITSPPathMoveEvaluator op in Operators.OfType<ITSPPathMoveEvaluator>()) {
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| 352 | op.CoordinatesParameter.ActualName = CoordinatesParameter.Name;
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| 353 | op.DistanceMatrixParameter.ActualName = DistanceMatrixParameter.Name;
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| 354 | op.UseDistanceMatrixParameter.ActualName = UseDistanceMatrixParameter.Name;
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[3209] | 355 | op.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
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| 356 | op.PermutationParameter.ActualName = SolutionCreator.PermutationParameter.ActualName;
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[3074] | 357 | }
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[3340] | 358 | string inversionMove = Operators.OfType<IMoveGenerator>().OfType<IPermutationInversionMoveOperator>().First().InversionMoveParameter.ActualName;
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| 359 | foreach (IPermutationInversionMoveOperator op in Operators.OfType<IPermutationInversionMoveOperator>())
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| 360 | op.InversionMoveParameter.ActualName = inversionMove;
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| 361 | string translocationMove = Operators.OfType<IMoveGenerator>().OfType<IPermutationTranslocationMoveOperator>().First().TranslocationMoveParameter.ActualName;
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| 362 | foreach (IPermutationTranslocationMoveOperator op in Operators.OfType<IPermutationTranslocationMoveOperator>())
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| 363 | op.TranslocationMoveParameter.ActualName = translocationMove;
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[2975] | 364 | }
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[3074] | 365 |
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[3066] | 366 | private void ClearDistanceMatrix() {
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| 367 | DistanceMatrixParameter.Value = null;
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| 368 | }
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[2975] | 369 | #endregion
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[2796] | 370 | }
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| 371 | }
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