1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 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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22 | using HeuristicLab.Common;
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23 | using HeuristicLab.Core;
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24 | using HeuristicLab.Data;
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25 | using HeuristicLab.Operators;
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26 | using HeuristicLab.Optimization.Operators;
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27 | using HeuristicLab.Parameters;
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28 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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29 | using HeuristicLab.Selection;
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30 |
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31 | namespace HeuristicLab.Algorithms.NSGA2 {
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32 | /// <summary>
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33 | /// An operator that represents the mainloop of the NSGA-II
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34 | /// </summary>
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35 | [Item("NSGA2MainLoop", "An operator which represents the main loop of the NSGA-II algorithm.")]
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36 | [StorableClass("94AA6897-0ACA-4103-B504-620F1CE5D4E3")]
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37 | public class NSGA2MainLoop : AlgorithmOperator {
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38 | #region Parameter properties
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39 | public ValueLookupParameter<IRandom> RandomParameter {
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40 | get { return (ValueLookupParameter<IRandom>)Parameters["Random"]; }
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41 | }
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42 | public ValueLookupParameter<BoolArray> MaximizationParameter {
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43 | get { return (ValueLookupParameter<BoolArray>)Parameters["Maximization"]; }
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44 | }
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45 | public ScopeTreeLookupParameter<DoubleArray> QualitiesParameter {
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46 | get { return (ScopeTreeLookupParameter<DoubleArray>)Parameters["Qualities"]; }
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47 | }
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48 | public ValueLookupParameter<IntValue> PopulationSizeParameter {
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49 | get { return (ValueLookupParameter<IntValue>)Parameters["PopulationSize"]; }
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50 | }
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51 | public ValueLookupParameter<IOperator> SelectorParameter {
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52 | get { return (ValueLookupParameter<IOperator>)Parameters["Selector"]; }
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53 | }
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54 | public ValueLookupParameter<PercentValue> CrossoverProbabilityParameter {
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55 | get { return (ValueLookupParameter<PercentValue>)Parameters["CrossoverProbability"]; }
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56 | }
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57 | public ValueLookupParameter<IOperator> CrossoverParameter {
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58 | get { return (ValueLookupParameter<IOperator>)Parameters["Crossover"]; }
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59 | }
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60 | public ValueLookupParameter<PercentValue> MutationProbabilityParameter {
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61 | get { return (ValueLookupParameter<PercentValue>)Parameters["MutationProbability"]; }
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62 | }
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63 | public ValueLookupParameter<IOperator> MutatorParameter {
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64 | get { return (ValueLookupParameter<IOperator>)Parameters["Mutator"]; }
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65 | }
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66 | public ValueLookupParameter<IOperator> EvaluatorParameter {
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67 | get { return (ValueLookupParameter<IOperator>)Parameters["Evaluator"]; }
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68 | }
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69 | public ValueLookupParameter<IntValue> MaximumGenerationsParameter {
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70 | get { return (ValueLookupParameter<IntValue>)Parameters["MaximumGenerations"]; }
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71 | }
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72 | public ValueLookupParameter<VariableCollection> ResultsParameter {
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73 | get { return (ValueLookupParameter<VariableCollection>)Parameters["Results"]; }
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74 | }
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75 | public ValueLookupParameter<IOperator> AnalyzerParameter {
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76 | get { return (ValueLookupParameter<IOperator>)Parameters["Analyzer"]; }
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77 | }
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78 | public LookupParameter<IntValue> EvaluatedSolutionsParameter {
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79 | get { return (LookupParameter<IntValue>)Parameters["EvaluatedSolutions"]; }
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80 | }
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81 | public IValueLookupParameter<BoolValue> DominateOnEqualQualitiesParameter {
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82 | get { return (ValueLookupParameter<BoolValue>)Parameters["DominateOnEqualQualities"]; }
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83 | }
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84 | #endregion
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85 |
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86 | [StorableConstructor]
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87 | protected NSGA2MainLoop(bool deserializing) : base(deserializing) { }
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88 | [StorableHook(HookType.AfterDeserialization)]
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89 | private void AfterDeserialization() {
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90 | // BackwardsCompatibility3.3
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91 | #region Backwards compatible code, remove with 3.4
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92 | if (!Parameters.ContainsKey("DominateOnEqualQualities"))
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93 | Parameters.Add(new ValueLookupParameter<BoolValue>("DominateOnEqualQualities", "Flag which determines wether solutions with equal quality values should be treated as dominated."));
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94 | #endregion
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95 | }
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96 |
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97 | protected NSGA2MainLoop(NSGA2MainLoop original, Cloner cloner) : base(original, cloner) { }
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98 | public NSGA2MainLoop()
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99 | : base() {
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100 | Initialize();
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101 | }
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102 |
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103 | private void Initialize() {
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104 | #region Create parameters
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105 | Parameters.Add(new ValueLookupParameter<IRandom>("Random", "A pseudo random number generator."));
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106 | Parameters.Add(new ValueLookupParameter<BoolArray>("Maximization", "True if an objective should be maximized, or false if it should be minimized."));
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107 | Parameters.Add(new ScopeTreeLookupParameter<DoubleArray>("Qualities", "The vector of quality values."));
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108 | Parameters.Add(new ValueLookupParameter<IntValue>("PopulationSize", "The population size."));
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109 | Parameters.Add(new ValueLookupParameter<IOperator>("Selector", "The operator used to select solutions for reproduction."));
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110 | Parameters.Add(new ValueLookupParameter<PercentValue>("CrossoverProbability", "The probability that the crossover operator is applied on a solution."));
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111 | Parameters.Add(new ValueLookupParameter<IOperator>("Crossover", "The operator used to cross solutions."));
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112 | Parameters.Add(new ValueLookupParameter<PercentValue>("MutationProbability", "The probability that the mutation operator is applied on a solution."));
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113 | Parameters.Add(new ValueLookupParameter<IOperator>("Mutator", "The operator used to mutate solutions."));
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114 | Parameters.Add(new ValueLookupParameter<IOperator>("Evaluator", "The operator used to evaluate solutions. This operator is executed in parallel, if an engine is used which supports parallelization."));
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115 | Parameters.Add(new ValueLookupParameter<IntValue>("MaximumGenerations", "The maximum number of generations which should be processed."));
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116 | Parameters.Add(new ValueLookupParameter<VariableCollection>("Results", "The variable collection where results should be stored."));
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117 | Parameters.Add(new ValueLookupParameter<IOperator>("Analyzer", "The operator used to analyze each generation."));
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118 | Parameters.Add(new LookupParameter<IntValue>("EvaluatedSolutions", "The number of times solutions have been evaluated."));
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119 | Parameters.Add(new ValueLookupParameter<BoolValue>("DominateOnEqualQualities", "Flag which determines wether solutions with equal quality values should be treated as dominated."));
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120 | #endregion
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121 |
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122 | #region Create operators
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123 | VariableCreator variableCreator = new VariableCreator();
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124 | ResultsCollector resultsCollector1 = new ResultsCollector();
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125 | Placeholder analyzer1 = new Placeholder();
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126 | Placeholder selector = new Placeholder();
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127 | SubScopesProcessor subScopesProcessor1 = new SubScopesProcessor();
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128 | ChildrenCreator childrenCreator = new ChildrenCreator();
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129 | UniformSubScopesProcessor uniformSubScopesProcessor1 = new UniformSubScopesProcessor();
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130 | StochasticBranch crossoverStochasticBranch = new StochasticBranch();
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131 | Placeholder crossover = new Placeholder();
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132 | ParentCopyCrossover noCrossover = new ParentCopyCrossover();
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133 | StochasticBranch mutationStochasticBranch = new StochasticBranch();
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134 | Placeholder mutator = new Placeholder();
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135 | SubScopesRemover subScopesRemover = new SubScopesRemover();
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136 | UniformSubScopesProcessor uniformSubScopesProcessor2 = new UniformSubScopesProcessor();
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137 | Placeholder evaluator = new Placeholder();
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138 | SubScopesCounter subScopesCounter = new SubScopesCounter();
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139 | MergingReducer mergingReducer = new MergingReducer();
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140 | RankAndCrowdingSorter rankAndCrowdingSorter = new RankAndCrowdingSorter();
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141 | LeftSelector leftSelector = new LeftSelector();
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142 | RightReducer rightReducer = new RightReducer();
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143 | IntCounter intCounter = new IntCounter();
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144 | Comparator comparator = new Comparator();
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145 | Placeholder analyzer2 = new Placeholder();
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146 | ConditionalBranch conditionalBranch = new ConditionalBranch();
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147 |
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148 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Generations", new IntValue(0)));
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149 |
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150 | resultsCollector1.CollectedValues.Add(new LookupParameter<IntValue>("Generations"));
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151 | resultsCollector1.ResultsParameter.ActualName = ResultsParameter.Name;
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152 |
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153 | analyzer1.Name = "Analyzer";
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154 | analyzer1.OperatorParameter.ActualName = AnalyzerParameter.Name;
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155 |
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156 | selector.Name = "Selector";
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157 | selector.OperatorParameter.ActualName = SelectorParameter.Name;
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158 |
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159 | childrenCreator.ParentsPerChild = new IntValue(2);
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160 |
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161 | crossoverStochasticBranch.ProbabilityParameter.ActualName = CrossoverProbabilityParameter.Name;
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162 | crossoverStochasticBranch.RandomParameter.ActualName = RandomParameter.Name;
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163 |
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164 | crossover.Name = "Crossover";
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165 | crossover.OperatorParameter.ActualName = CrossoverParameter.Name;
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166 |
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167 | noCrossover.Name = "Clone parent";
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168 | noCrossover.RandomParameter.ActualName = RandomParameter.Name;
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169 |
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170 | mutationStochasticBranch.ProbabilityParameter.ActualName = MutationProbabilityParameter.Name;
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171 | mutationStochasticBranch.RandomParameter.ActualName = RandomParameter.Name;
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172 |
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173 | mutator.Name = "Mutator";
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174 | mutator.OperatorParameter.ActualName = MutatorParameter.Name;
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175 |
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176 | subScopesRemover.RemoveAllSubScopes = true;
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177 |
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178 | uniformSubScopesProcessor2.Parallel.Value = true;
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179 |
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180 | evaluator.Name = "Evaluator";
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181 | evaluator.OperatorParameter.ActualName = EvaluatorParameter.Name;
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182 |
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183 | subScopesCounter.Name = "Increment EvaluatedSolutions";
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184 | subScopesCounter.ValueParameter.ActualName = EvaluatedSolutionsParameter.Name;
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185 |
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186 | rankAndCrowdingSorter.DominateOnEqualQualitiesParameter.ActualName = DominateOnEqualQualitiesParameter.Name;
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187 | rankAndCrowdingSorter.CrowdingDistanceParameter.ActualName = "CrowdingDistance";
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188 | rankAndCrowdingSorter.RankParameter.ActualName = "Rank";
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189 |
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190 | leftSelector.CopySelected = new BoolValue(false);
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191 | leftSelector.NumberOfSelectedSubScopesParameter.ActualName = PopulationSizeParameter.Name;
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192 |
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193 | intCounter.Increment = new IntValue(1);
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194 | intCounter.ValueParameter.ActualName = "Generations";
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195 |
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196 | comparator.Comparison = new Comparison(ComparisonType.GreaterOrEqual);
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197 | comparator.LeftSideParameter.ActualName = "Generations";
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198 | comparator.ResultParameter.ActualName = "Terminate";
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199 | comparator.RightSideParameter.ActualName = MaximumGenerationsParameter.Name;
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200 |
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201 | analyzer2.Name = "Analyzer";
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202 | analyzer2.OperatorParameter.ActualName = "Analyzer";
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203 |
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204 | conditionalBranch.ConditionParameter.ActualName = "Terminate";
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205 | #endregion
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206 |
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207 | #region Create operator graph
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208 | OperatorGraph.InitialOperator = variableCreator;
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209 | variableCreator.Successor = resultsCollector1;
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210 | resultsCollector1.Successor = analyzer1;
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211 | analyzer1.Successor = selector;
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212 | selector.Successor = subScopesProcessor1;
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213 | subScopesProcessor1.Operators.Add(new EmptyOperator());
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214 | subScopesProcessor1.Operators.Add(childrenCreator);
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215 | subScopesProcessor1.Successor = mergingReducer;
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216 | childrenCreator.Successor = uniformSubScopesProcessor1;
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217 | uniformSubScopesProcessor1.Operator = crossoverStochasticBranch;
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218 | uniformSubScopesProcessor1.Successor = uniformSubScopesProcessor2;
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219 | crossoverStochasticBranch.FirstBranch = crossover;
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220 | crossoverStochasticBranch.SecondBranch = noCrossover;
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221 | crossoverStochasticBranch.Successor = mutationStochasticBranch;
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222 | crossover.Successor = null;
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223 | noCrossover.Successor = null;
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224 | mutationStochasticBranch.FirstBranch = mutator;
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225 | mutationStochasticBranch.SecondBranch = null;
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226 | mutationStochasticBranch.Successor = subScopesRemover;
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227 | mutator.Successor = null;
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228 | subScopesRemover.Successor = null;
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229 | uniformSubScopesProcessor2.Operator = evaluator;
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230 | uniformSubScopesProcessor2.Successor = subScopesCounter;
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231 | evaluator.Successor = null;
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232 | subScopesCounter.Successor = null;
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233 | mergingReducer.Successor = rankAndCrowdingSorter;
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234 | rankAndCrowdingSorter.Successor = leftSelector;
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235 | leftSelector.Successor = rightReducer;
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236 | rightReducer.Successor = intCounter;
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237 | intCounter.Successor = comparator;
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238 | comparator.Successor = analyzer2;
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239 | analyzer2.Successor = conditionalBranch;
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240 | conditionalBranch.FalseBranch = selector;
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241 | conditionalBranch.TrueBranch = null;
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242 | conditionalBranch.Successor = null;
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243 | #endregion
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244 | }
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245 |
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246 | public override IDeepCloneable Clone(Cloner cloner) {
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247 | return new NSGA2MainLoop(this, cloner);
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248 | }
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249 | }
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250 | }
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