1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Linq;
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4 | using System.Text;
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5 | using HeuristicLab.Core;
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6 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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7 | using HeuristicLab.Common;
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8 | using HeuristicLab.Optimization;
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9 | using HeuristicLab.Parameters;
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10 | using HeuristicLab.Data;
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11 | using HeuristicLab.Analysis;
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12 | using HeuristicLab.Random;
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13 | using HeuristicLab.Optimization.Operators;
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14 | using HeuristicLab.Operators;
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15 |
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16 | namespace HeuristicLab.Algorithms.VariableNeighborhoodSearch {
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17 | [Item("Variable Neighborhood Search", "A variable neighborhood search algorithm.")]
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18 | [Creatable("Algorithms")]
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19 | [StorableClass]
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20 | public sealed class VariableNeighborhoodSearch : EngineAlgorithm, IStorableContent {
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21 | public string Filename { get; set; }
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22 |
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23 | #region Problem Properties
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24 | public override Type ProblemType {
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25 | get { return typeof(ISingleObjectiveProblem); }
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26 | }
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27 | public new ISingleObjectiveProblem Problem {
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28 | get { return (ISingleObjectiveProblem)base.Problem; }
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29 | set { base.Problem = value; }
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30 | }
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31 | #endregion
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32 |
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33 | #region Parameter Properties
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34 | private ValueParameter<IntValue> SeedParameter {
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35 | get { return (ValueParameter<IntValue>)Parameters["Seed"]; }
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36 | }
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37 | private ValueParameter<BoolValue> SetSeedRandomlyParameter {
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38 | get { return (ValueParameter<BoolValue>)Parameters["SetSeedRandomly"]; }
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39 | }
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40 | public /*Constrained*/ValueParameter<ISingleObjectiveEvaluator> EvaluatorParameter {
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41 | get { return (/*Constrained*/ValueParameter<ISingleObjectiveEvaluator>)Parameters["Evaluator"]; }
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42 | }
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43 | private ValueParameter<ILocalImprovement> LocalImprovementParameter {
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44 | get { return (ValueParameter<ILocalImprovement>)Parameters["LocalImprovement"]; }
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45 | }
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46 | private ValueParameter<ShakingOperator> ShakingParameter {
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47 | get { return (ValueParameter<ShakingOperator>)Parameters["Shaking"]; }
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48 | }
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49 | private ValueParameter<IntValue> MaximumIterationsParameter {
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50 | get { return (ValueParameter<IntValue>)Parameters["MaximumIterations"]; }
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51 | }
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52 | private ValueParameter<MultiAnalyzer> AnalyzerParameter {
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53 | get { return (ValueParameter<MultiAnalyzer>)Parameters["Analyzer"]; }
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54 | }
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55 | #endregion
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56 |
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57 | #region Properties
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58 | private RandomCreator RandomCreator {
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59 | get { return (RandomCreator)OperatorGraph.InitialOperator; }
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60 | }
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61 | #endregion
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62 |
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63 | [StorableConstructor]
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64 | private VariableNeighborhoodSearch(bool deserializing) : base(deserializing) { }
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65 | [StorableHook(HookType.AfterDeserialization)]
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66 | private void AfterDeserialization() {
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67 |
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68 | }
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69 | private VariableNeighborhoodSearch(VariableNeighborhoodSearch original, Cloner cloner)
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70 | : base(original, cloner) {
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71 |
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72 | }
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73 | public override IDeepCloneable Clone(Cloner cloner) {
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74 | return new VariableNeighborhoodSearch(this, cloner);
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75 | }
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76 | public VariableNeighborhoodSearch()
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77 | : base() {
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78 | Parameters.Add(new ValueParameter<IntValue>("Seed", "The random seed used to initialize the new pseudo random number generator.", new IntValue(0)));
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79 | Parameters.Add(new ValueParameter<BoolValue>("SetSeedRandomly", "True if the random seed should be set to a random value, otherwise false.", new BoolValue(true)));
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80 | Parameters.Add(new /*Constrained*/ValueParameter<ISingleObjectiveEvaluator>("Evaluator", "The operator used to evaluate the solutions."));
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81 | Parameters.Add(new ValueParameter<ILocalImprovement>("LocalImprovement", "The local improvement operation", new LocalSearchImprovement()));
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82 | Parameters.Add(new ValueParameter<ShakingOperator>("Shaking", "The shaking operation", new ShakingOperator()));
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83 | Parameters.Add(new ValueParameter<IntValue>("MaximumIterations", "The maximum number of generations which should be processed.", new IntValue(1000)));
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84 | Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze the solution and moves.", new MultiAnalyzer()));
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85 |
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86 | RandomCreator randomCreator = new RandomCreator();
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87 | SolutionsCreator solutionsCreator = new SolutionsCreator();
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88 | VariableCreator variableCreator = new VariableCreator();
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89 | ResultsCollector resultsCollector = new ResultsCollector();
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90 | VariableNeighborhoodSearchMainLoop mainLoop = new VariableNeighborhoodSearchMainLoop();
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91 | OperatorGraph.InitialOperator = randomCreator;
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92 |
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93 | randomCreator.RandomParameter.ActualName = "Random";
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94 | randomCreator.SeedParameter.ActualName = SeedParameter.Name;
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95 | randomCreator.SeedParameter.Value = null;
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96 | randomCreator.SetSeedRandomlyParameter.ActualName = SetSeedRandomlyParameter.Name;
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97 | randomCreator.SetSeedRandomlyParameter.Value = null;
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98 | randomCreator.Successor = solutionsCreator;
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99 |
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100 | solutionsCreator.NumberOfSolutions = new IntValue(1);
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101 | solutionsCreator.Successor = variableCreator;
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102 |
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103 | variableCreator.Name = "Initialize Evaluated Solutions";
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104 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("EvaluatedSolutions", new IntValue()));
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105 | variableCreator.Successor = resultsCollector;
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106 |
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107 | resultsCollector.CollectedValues.Add(new LookupParameter<IntValue>("Evaluated Solutions", null, "EvaluatedSolutions"));
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108 | resultsCollector.ResultsParameter.ActualName = "Results";
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109 | resultsCollector.Successor = mainLoop;
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110 |
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111 | mainLoop.LocalImprovementParameter.ActualName = LocalImprovementParameter.Name;
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112 | mainLoop.ShakingParameter.ActualName = ShakingParameter.Name;
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113 | mainLoop.EvaluatorParameter.ActualName = EvaluatorParameter.Name;
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114 | mainLoop.MaximumIterationsParameter.ActualName = MaximumIterationsParameter.Name;
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115 | mainLoop.RandomParameter.ActualName = RandomCreator.RandomParameter.ActualName;
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116 | mainLoop.ResultsParameter.ActualName = "Results";
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117 | mainLoop.AnalyzerParameter.ActualName = AnalyzerParameter.Name;
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118 | mainLoop.EvaluatedSolutionsParameter.ActualName = "EvaluatedSolutions";
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119 |
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120 | /*Initialize();*/
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121 | }
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122 | }
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123 | }
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