1 | using System.Linq;
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2 | using HeuristicLab.Common;
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3 | using HeuristicLab.Core;
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4 | using HeuristicLab.Data;
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5 | using HeuristicLab.Operators;
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6 | using HeuristicLab.Optimization;
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7 | using HeuristicLab.Parameters;
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8 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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9 |
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10 | namespace HeuristicLab.EvolutionTracking {
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11 | [StorableClass]
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12 | [Item("GenealogyAnalyzer", "An analyzer which performs the necessary instrumentation to record the evolution of a genetic algorithm.")]
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13 | public class GenealogyAnalyzer<T> : SingleSuccessorOperator, IAnalyzer
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14 | where T : class,IItem {
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15 |
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16 | public string CrossoverParentsParameterName { get; set; }
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17 | public string CrossoverChildParameterName { get; set; }
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18 | public string ManipulatorChildParameterName { get; set; }
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19 |
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20 | public IScopeTreeLookupParameter<DoubleValue> QualityParameter;
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21 | public IScopeTreeLookupParameter<T> PopulationParameter;
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22 |
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23 | public ICrossoverOperator<T> BeforeCrossoverOperator { get; set; }
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24 | public ICrossoverOperator<T> AfterCrossoverOperator { get; set; }
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25 | public IManipulatorOperator<T> BeforeManipulatorOperator { get; set; }
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26 | public IManipulatorOperator<T> AfterManipulatorOperator { get; set; }
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27 |
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28 | private const string PopulationParameterName = "Population";
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29 | private const string QualityParameterName = "Quality";
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30 |
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31 | private const string GenerationsParameterName = "Generations";
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32 | private const string ResultsParameterName = "Results";
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33 | private const string PopulationGraphParameterName = "PopulationGraph";
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34 |
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35 | private const string CrossoverParameterName = "Crossover";
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36 | private const string ManipulatorParameterName = "Mutator";
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37 | private const string SolutionCreatorParameterName = "SolutionCreator";
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38 |
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39 | private const string EnableCrossoverTrackingParameterName = "EnableCrossoverTracking";
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40 | private const string EnableManipulatorTrackingParameterName = "EnableManipulatorTracking";
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41 | private const string EnableSolutionCreatorTrackingParameterName = "EnableSolutionCreatorTracking"; // should always be enabled. maybe superfluous
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42 |
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43 | #region parameter properties
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44 | public ILookupParameter<ResultCollection> ResultsParameter {
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45 | get { return (ILookupParameter<ResultCollection>)Parameters[ResultsParameterName]; }
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46 | }
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47 | public ILookupParameter<IntValue> GenerationsParameter {
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48 | get { return (ILookupParameter<IntValue>)Parameters[GenerationsParameterName]; }
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49 | }
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50 | public IValueParameter<BoolValue> EnableCrossoverTrackingParameter {
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51 | get { return (IValueParameter<BoolValue>)Parameters[EnableCrossoverTrackingParameterName]; }
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52 | }
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53 | public IValueParameter<BoolValue> EnableManipulatorTrackingParameter {
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54 | get { return (IValueParameter<BoolValue>)Parameters[EnableManipulatorTrackingParameterName]; }
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55 | }
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56 | public IValueParameter<BoolValue> EnableSolutionCreatorTrackingParameter {
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57 | get { return (IValueParameter<BoolValue>)Parameters[EnableSolutionCreatorTrackingParameterName]; }
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58 | }
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59 | public ILookupParameter<ICrossover> CrossoverParameter {
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60 | get { return (ILookupParameter<ICrossover>)Parameters[CrossoverParameterName]; }
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61 | }
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62 | public ILookupParameter<IManipulator> ManipulatorParameter {
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63 | get { return (ILookupParameter<IManipulator>)Parameters[ManipulatorParameterName]; }
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64 | }
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65 | public ILookupParameter<ISolutionCreator> SolutionCreatorParameter {
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66 | get { return (ILookupParameter<ISolutionCreator>)Parameters[SolutionCreatorParameterName]; }
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67 | }
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68 | #endregion
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69 |
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70 | #region properties
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71 | public ICrossover Crossover {
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72 | get { return CrossoverParameter.ActualValue; }
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73 | }
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74 | public IManipulator Manipulator {
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75 | get { return ManipulatorParameter.ActualValue; }
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76 | }
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77 | public ISolutionCreator SolutionCreator {
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78 | get { return SolutionCreatorParameter.ActualValue; }
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79 | }
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80 | public BoolValue EnableCrossoverTracking {
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81 | get { return EnableCrossoverTrackingParameter.Value; }
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82 | }
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83 | public BoolValue EnableManipulatorTracking {
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84 | get { return EnableManipulatorTrackingParameter.Value; }
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85 | }
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86 | public BoolValue EnableSolutionCreatorTracking {
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87 | get { return EnableSolutionCreatorTrackingParameter.Value; }
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88 | }
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89 | public ResultCollection Results {
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90 | get { return ResultsParameter.ActualValue; }
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91 | }
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92 | public IntValue Generations {
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93 | get { return GenerationsParameter.ActualValue; }
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94 | }
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95 | public IGenealogyGraph<T> GenealogyGraph {
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96 | get {
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97 | IResult result;
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98 | if (!Results.ContainsKey(PopulationGraphParameterName)) {
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99 | result = new Result(PopulationGraphParameterName, new GenealogyGraph<T>());
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100 | Results.Add(result);
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101 | } else {
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102 | result = Results[PopulationGraphParameterName];
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103 | }
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104 | var graph = (IGenealogyGraph<T>)result.Value;
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105 | return graph;
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106 | }
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107 | }
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108 | #endregion
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109 |
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110 | public GenealogyAnalyzer() {
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111 | // the instrumented operators
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112 | Parameters.Add(new LookupParameter<ICrossover>(CrossoverParameterName, "The crossover operator."));
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113 | Parameters.Add(new LookupParameter<IManipulator>(ManipulatorParameterName, "The manipulator operator."));
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114 | Parameters.Add(new LookupParameter<ISolutionCreator>(SolutionCreatorParameterName, "The solution creator operator."));
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115 | // the analyzer parameters
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116 | Parameters.Add(new ValueParameter<BoolValue>(EnableCrossoverTrackingParameterName, new BoolValue(true)));
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117 | Parameters.Add(new ValueParameter<BoolValue>(EnableManipulatorTrackingParameterName, new BoolValue(true)));
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118 | Parameters.Add(new ValueParameter<BoolValue>(EnableSolutionCreatorTrackingParameterName, new BoolValue(true)));
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119 | // parameters required by the analyzer to do its work
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120 | Parameters.Add(new LookupParameter<IntValue>(GenerationsParameterName, "The number of generations so far."));
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121 | Parameters.Add(new LookupParameter<ResultCollection>(ResultsParameterName));
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122 | PopulationParameter = new ScopeTreeLookupParameter<T>(PopulationParameterName);
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123 | QualityParameter = new ScopeTreeLookupParameter<DoubleValue>(QualityParameterName);
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124 | Parameters.Add(PopulationParameter);
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125 | Parameters.Add(QualityParameter);
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126 | }
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127 | public override IDeepCloneable Clone(Cloner cloner) {
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128 | return new GenealogyAnalyzer<T>(this, cloner);
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129 | }
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130 | protected GenealogyAnalyzer(GenealogyAnalyzer<T> original, Cloner cloner)
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131 | : base(original, cloner) {
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132 | }
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133 | [StorableHook(HookType.AfterDeserialization)]
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134 | private void AfterDeserialization() {
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135 | // the instrumented operators
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136 | if (!Parameters.ContainsKey(CrossoverParameterName))
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137 | Parameters.Add(new LookupParameter<ICrossover>(CrossoverParameterName, "The crossover operator."));
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138 | if (!Parameters.ContainsKey(ManipulatorParameterName))
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139 | Parameters.Add(new LookupParameter<IManipulator>(ManipulatorParameterName, "The manipulator operator."));
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140 | if (!Parameters.ContainsKey(SolutionCreatorParameterName))
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141 | Parameters.Add(new LookupParameter<ISolutionCreator>(SolutionCreatorParameterName, "The solution creator operator."));
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142 | // the analyzer parameters
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143 | if (!Parameters.ContainsKey(EnableCrossoverTrackingParameterName))
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144 | Parameters.Add(new ValueParameter<BoolValue>(EnableCrossoverTrackingParameterName, new BoolValue(true)));
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145 | if (!Parameters.ContainsKey(EnableManipulatorTrackingParameterName))
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146 | Parameters.Add(new ValueParameter<BoolValue>(EnableManipulatorTrackingParameterName, new BoolValue(true)));
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147 | if (!Parameters.ContainsKey(EnableSolutionCreatorTrackingParameterName))
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148 | Parameters.Add(new ValueParameter<BoolValue>(EnableSolutionCreatorTrackingParameterName, new BoolValue(true)));
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149 | // parameters required by the analyzer to do its work
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150 | if (!Parameters.ContainsKey(GenerationsParameterName))
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151 | Parameters.Add(new LookupParameter<IntValue>(GenerationsParameterName, "The number of generations so far."));
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152 | if (!Parameters.ContainsKey(ResultsParameterName))
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153 | Parameters.Add(new LookupParameter<ResultCollection>(ResultsParameterName));
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154 | if (!Parameters.ContainsKey(PopulationParameterName)) {
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155 | PopulationParameter = new ScopeTreeLookupParameter<T>(PopulationParameterName);
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156 | Parameters.Add(PopulationParameter);
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157 | }
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158 | if (!Parameters.ContainsKey(QualityParameterName)) {
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159 | QualityParameter = new ScopeTreeLookupParameter<DoubleValue>(QualityParameterName);
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160 | Parameters.Add(QualityParameter);
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161 | }
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162 | }
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163 |
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164 | public bool EnabledByDefault {
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165 | get { return false; }
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166 | }
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167 |
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168 | private void ConfigureTrackingOperators() {
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169 | // at the beginning we add the before/after operators to the instrumented operators
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170 | if (Crossover != null) {
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171 | var instrumentedCrossover = (InstrumentedOperator)Crossover;
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172 | instrumentedCrossover.AfterExecutionOperators.Clear();
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173 | instrumentedCrossover.BeforeExecutionOperators.Clear();
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174 |
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175 | if (EnableCrossoverTracking.Value) {
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176 | if (BeforeCrossoverOperator != null) {
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177 | BeforeCrossoverOperator.ParentsParameter.ActualName = CrossoverParentsParameterName;
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178 | BeforeCrossoverOperator.ChildParameter.ActualName = CrossoverChildParameterName;
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179 | instrumentedCrossover.BeforeExecutionOperators.Add(BeforeCrossoverOperator);
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180 | }
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181 | if (AfterCrossoverOperator != null) {
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182 | AfterCrossoverOperator.ParentsParameter.ActualName = CrossoverParentsParameterName;
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183 | AfterCrossoverOperator.ChildParameter.ActualName = CrossoverChildParameterName;
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184 | instrumentedCrossover.AfterExecutionOperators.Add(AfterCrossoverOperator);
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185 | }
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186 | }
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187 | }
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188 |
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189 | if (Manipulator != null) {
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190 | var instrumentedManipulator = (InstrumentedOperator)Manipulator;
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191 | instrumentedManipulator.AfterExecutionOperators.Clear();
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192 | instrumentedManipulator.BeforeExecutionOperators.Clear();
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193 |
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194 | if (EnableManipulatorTracking.Value) {
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195 | if (BeforeManipulatorOperator != null) {
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196 | BeforeManipulatorOperator.ChildParameter.ActualName = ManipulatorChildParameterName;
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197 | instrumentedManipulator.BeforeExecutionOperators.Add(BeforeManipulatorOperator);
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198 | }
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199 | if (AfterManipulatorOperator != null) {
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200 | AfterManipulatorOperator.ChildParameter.ActualName = ManipulatorChildParameterName;
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201 | instrumentedManipulator.AfterExecutionOperators.Add(AfterManipulatorOperator);
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202 | }
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203 | }
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204 | }
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205 | }
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206 |
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207 | public override IOperation Apply() {
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208 | var population = PopulationParameter.ActualValue.ToList();
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209 | var qualities = QualityParameter.ActualValue.ToList();
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210 |
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211 | if (Generations.Value == 0) {
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212 | ConfigureTrackingOperators();
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213 |
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214 | for (int i = 0; i < population.Count; ++i) {
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215 | var individual = population[i];
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216 | var vertex = new GenealogyGraphNode<T> { Content = individual, Rank = Generations.Value, };
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217 | GenealogyGraph.AddVertex(vertex);
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218 | // save the vertex id in the individual scope (so that we can identify graph indices)
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219 | ExecutionContext.Scope.SubScopes[i].Variables.Add(new Variable("Id", new StringValue(vertex.Id)));
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220 | }
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221 | } else {
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222 | var elite = population.FirstOrDefault(x => GenealogyGraph.Contains(x));
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223 | if (elite != null) {
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224 | var vertex = new GenealogyGraphNode<T> {
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225 | Content = (T)elite.Clone(),
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226 | Rank = Generations.Value,
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227 | IsElite = true
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228 | };
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229 | var previousVertex = (IGenealogyGraphNode<T>)GenealogyGraph[elite];
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230 | GenealogyGraph.AddVertex(vertex);
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231 | previousVertex.AddForwardArc(vertex);
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232 | vertex.AddReverseArc(previousVertex);
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233 | vertex.Id = previousVertex.Id; // another way would be to introduce the vertex.Id into the scope of the elite
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234 | vertex.Quality = previousVertex.Quality;
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235 |
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236 | if (previousVertex.InArcs.Any()) {
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237 | vertex.InArcs.Last().Data = previousVertex.InArcs.Last().Data; // save the fragment in case there is one
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238 | }
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239 | }
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240 | }
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241 | // update qualities
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242 | for (int i = 0; i < population.Count; ++i) {
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243 | var vertex = (IGenealogyGraphNode)GenealogyGraph[population[i]];
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244 | vertex.Quality = qualities[i].Value;
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245 | }
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246 |
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247 | return base.Apply();
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248 | }
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249 | }
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250 | }
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