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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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.Linq;
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25 | using HeuristicLab.Common;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Data;
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28 | using HeuristicLab.Encodings.RealVectorEncoding;
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29 | using HeuristicLab.Optimization;
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30 | using HeuristicLab.Operators;
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31 | using HeuristicLab.Optimization.Operators;
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32 | using HeuristicLab.Parameters;
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33 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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34 | using HeuristicLab.PluginInfrastructure;
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35 | using HeuristicLab.Random;
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36 | using HeuristicLab.Analysis;
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37 |
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38 | namespace HeuristicLab.Algorithms.ParticleSwarmOptimization {
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39 | [Item("Particle Swarm Optimization", "A particle swarm optimization algorithm.")]
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40 | [Creatable("Algorithms")]
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41 | [StorableClass]
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42 | public sealed class ParticleSwarmOptimization : EngineAlgorithm {
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43 | #region Problem Properties
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44 | public override Type ProblemType {
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45 | get { return typeof(ISingleObjectiveProblem); }
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46 | }
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47 | public new ISingleObjectiveProblem Problem {
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48 | get { return (ISingleObjectiveProblem)base.Problem; }
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49 | set { base.Problem = value; }
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50 | }
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51 | public IRealVectorEncoder Encoder {
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52 | get { return EncoderParameter.Value; }
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53 | set { EncoderParameter.Value = value; }
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54 | }
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55 | public MultiAnalyzer Analyzer {
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56 | get { return AnalyzerParameter.Value; }
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57 | set { AnalyzerParameter.Value = value; }
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58 | }
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59 | #endregion
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60 |
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61 | #region Parameter Properties
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62 | private ValueParameter<IntValue> SeedParameter {
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63 | get { return (ValueParameter<IntValue>)Parameters["Seed"]; }
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64 | }
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65 | private ValueParameter<BoolValue> SetSeedRandomlyParameter {
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66 | get { return (ValueParameter<BoolValue>)Parameters["SetSeedRandomly"]; }
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67 | }
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68 | private ValueParameter<IntValue> SwarmSizeParameter {
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69 | get { return (ValueParameter<IntValue>)Parameters["SwarmSize"]; }
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70 | }
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71 | private ValueParameter<IntValue> MaxIterationsParameter {
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72 | get { return (ValueParameter<IntValue>)Parameters["MaxIterations"]; }
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73 | }
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74 | private OptionalConstrainedValueParameter<IRealVectorEncoder> EncoderParameter {
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75 | get { return (OptionalConstrainedValueParameter<IRealVectorEncoder>)Parameters["Encoder"]; }
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76 | }
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77 | private ValueParameter<MultiAnalyzer> AnalyzerParameter {
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78 | get { return (ValueParameter<MultiAnalyzer>)Parameters["Analyzer"]; }
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79 | }
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80 | #endregion
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81 |
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82 | #region Properties
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83 | [Storable]
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84 | private ParticleSwarmOptimizationMainLoop mainLoop; // Check this !
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85 | private ParticleSwarmOptimizationMainLoop MainLoop {
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86 | get { return mainLoop; }
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87 | }
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88 | [Storable]
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89 | private Assigner bestLocalQualityInitalizer; // Check this !
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90 | private Assigner BestLocalQualityInitalizer {
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91 | get { return bestLocalQualityInitalizer; }
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92 | }
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93 | [Storable]
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94 | private BestAverageWorstQualityAnalyzer qualityAnalyzer;
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95 | #endregion
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96 |
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97 | public ParticleSwarmOptimization()
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98 | : base() {
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99 | 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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100 | 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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101 | Parameters.Add(new ValueParameter<IntValue>("SwarmSize", "Size of the particle swarm.", new IntValue(10)));
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102 | Parameters.Add(new ValueParameter<IntValue>("MaxIterations", "Maximal number of iterations.", new IntValue(1000)));
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103 | Parameters.Add(new ConstrainedValueParameter<IRealVectorEncoder>("Encoder", "The operator used to encode solutions as position vector."));
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104 | Parameters.Add(new ValueParameter<MultiAnalyzer>("Analyzer", "The operator used to analyze each generation.", new MultiAnalyzer()));
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105 | RandomCreator randomCreator = new RandomCreator();
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106 | SolutionsCreator solutionsCreator = new SolutionsCreator();
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107 | UniformSubScopesProcessor uniformSubScopesProcessor = new UniformSubScopesProcessor();
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108 | UniformSubScopesProcessor uniformSubScopesProcessor2 = new UniformSubScopesProcessor();
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109 | VariableCreator variableCreator = new VariableCreator();
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110 | VariableCreator localVariableCreator = new VariableCreator();
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111 | Placeholder encoder = new Placeholder();
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112 | UniformRandomRealVectorCreator velocityVectorCreator = new UniformRandomRealVectorCreator();
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113 | bestLocalQualityInitalizer = new Assigner();
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114 | Assigner bestLocalPositionInitalizer = new Assigner();
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115 | Assigner bestGlobalPositionInitalizer = new Assigner();
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116 | mainLoop = new ParticleSwarmOptimizationMainLoop();
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117 | BestAverageWorstQualityCalculator bawCalculator = new BestAverageWorstQualityCalculator();
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118 | Comparator comparator = new Comparator();
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119 | ConditionalBranch branch = new ConditionalBranch();
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120 |
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121 | variableCreator.CollectedValues.Add(new ValueParameter<RealVector>("CurrentBestPosition", new RealVector()));
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122 | variableCreator.CollectedValues.Add(new ValueParameter<DoubleMatrix>("ZeroBounds", new DoubleMatrix(new double[,] { { 0, 0 } })));
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123 | variableCreator.CollectedValues.Add(new ValueParameter<IntValue>("Length", new IntValue(2)));
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124 |
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125 | localVariableCreator.CollectedValues.Add(new ValueParameter<DoubleValue>("BestQuality", new DoubleValue(0)));
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126 | localVariableCreator.CollectedValues.Add(new ValueParameter<RealVector>("BestPosition", new RealVector()));
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127 |
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128 | randomCreator.RandomParameter.ActualName = "Random";
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129 | randomCreator.SeedParameter.ActualName = SeedParameter.Name;
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130 | randomCreator.SeedParameter.Value = null;
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131 | randomCreator.SetSeedRandomlyParameter.ActualName = SetSeedRandomlyParameter.Name;
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132 | randomCreator.SetSeedRandomlyParameter.Value = null;
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133 |
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134 | solutionsCreator.NumberOfSolutionsParameter.ActualName = SwarmSizeParameter.Name;
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135 |
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136 | encoder.OperatorParameter.ActualName = "Encoder";
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137 |
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138 | velocityVectorCreator.BoundsParameter.ActualName = "ZeroBounds";
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139 | velocityVectorCreator.RealVectorParameter.ActualName = "Velocity";
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140 |
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141 | bestLocalQualityInitalizer.LeftSideParameter.ActualName = "BestQuality"; // cloned value
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142 | bestLocalQualityInitalizer.RightSideParameter.ActualName = "Quality"; // FIXME!!! Should be mapped
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143 |
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144 | bestLocalPositionInitalizer.LeftSideParameter.ActualName = "BestPosition";
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145 | bestLocalPositionInitalizer.RightSideParameter.ActualName = "Position"; // FixMe
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146 |
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147 | bestGlobalPositionInitalizer.LeftSideParameter.ActualName = "CurrentBestPosition";
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148 | bestGlobalPositionInitalizer.RightSideParameter.ActualName = "BestPosition";
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149 |
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150 | bawCalculator.AverageQualityParameter.ActualName = "CurrentAverageBestQuality";
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151 | bawCalculator.BestQualityParameter.ActualName = "CurrentBestBestQuality";
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152 | bawCalculator.MaximizationParameter.ActualName = "Maximization"; // FIXME
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153 | bawCalculator.QualityParameter.ActualName = "Quality";
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154 | bawCalculator.WorstQualityParameter.ActualName = "CurrentWorstBestQuality";
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155 |
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156 | comparator.Comparison = new Comparison(ComparisonType.Equal);
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157 | comparator.LeftSideParameter.ActualName = "Quality";
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158 | comparator.ResultParameter.ActualName = "NewGlobalBest";
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159 | comparator.RightSideParameter.ActualName = "CurrentBestBestQuality";
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160 |
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161 | branch.ConditionParameter.ActualName = "NewGlobalBest";
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162 | branch.TrueBranch = bestGlobalPositionInitalizer; // copy position vector
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163 |
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164 | mainLoop.MaximumGenerationsParameter.ActualName = MaxIterationsParameter.Name;
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165 | mainLoop.ResultsParameter.ActualName = "Results";
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166 | mainLoop.AnalyzerParameter.ActualName = AnalyzerParameter.Name;
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167 |
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168 | OperatorGraph.InitialOperator = randomCreator;
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169 | randomCreator.Successor = solutionsCreator;
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170 | solutionsCreator.Successor = variableCreator;
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171 | variableCreator.Successor = uniformSubScopesProcessor;
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172 | uniformSubScopesProcessor.Operator = encoder;
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173 | encoder.Successor = velocityVectorCreator;
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174 | velocityVectorCreator.Successor = localVariableCreator;
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175 | localVariableCreator.Successor = bestLocalQualityInitalizer;
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176 | bestLocalQualityInitalizer.Successor = bestLocalPositionInitalizer;
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177 | uniformSubScopesProcessor.Successor = bawCalculator; // mainLoop;
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178 | bawCalculator.Successor = uniformSubScopesProcessor2;
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179 | uniformSubScopesProcessor2.Operator = comparator;
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180 | comparator.Successor = branch;
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181 | uniformSubScopesProcessor2.Successor = mainLoop;
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182 | InitializeAnalyzers();
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183 | UpdateAnalyzers();
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184 | Initialize();
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185 | }
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186 |
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187 | [StorableHook(HookType.AfterDeserialization)]
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188 | private void Initialize() {
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189 | EncoderParameter.ValueChanged += new EventHandler(EncoderParameter_ValueChanged);
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190 | if (Problem != null) {
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191 | bestLocalQualityInitalizer.RightSideParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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192 | }
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193 | }
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194 |
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195 | [StorableConstructor]
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196 | private ParticleSwarmOptimization(bool deserializing) : base(deserializing) { }
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197 |
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198 | public override IDeepCloneable Clone(Cloner cloner) {
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199 | ParticleSwarmOptimization clone = (ParticleSwarmOptimization)base.Clone(cloner);
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200 | clone.Initialize();
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201 | return clone;
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202 | }
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203 |
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204 | public override void Prepare() {
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205 | if (Problem != null) base.Prepare();
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206 | }
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207 |
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208 | #region Events
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209 | protected override void OnProblemChanged() {
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210 | UpdateEncoders();
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211 | UpdateAnalyzers();
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212 | ParameterizeAnalyzers();
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213 | bestLocalQualityInitalizer.RightSideParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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214 | Problem.Evaluator.QualityParameter.ActualNameChanged += new EventHandler(Evaluator_QualityParameter_ActualNameChanged);
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215 | MainLoop.EvaluatorParameter.ActualName = Problem.EvaluatorParameter.Name;
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216 | base.OnProblemChanged();
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217 | }
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218 |
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219 | private void EncoderParameter_ValueChanged(object sender, EventArgs e) {
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220 | //MainLoop.EncoderParameter.ActualValue = (IRealVectorEncoder) EncoderParameter.ActualValue;
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221 | //((UniformSubScopesProcessor)((VariableCreator)((SolutionsCreator)((RandomCreator)OperatorGraph.InitialOperator).Successor).Successor).Successor).Operator = EncoderParameter.Value;
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222 | //((SingleSuccessorOperator)EncoderParameter.Value).Successor = ((SingleSuccessorOperator)old).Successor;
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223 | }
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224 | #endregion
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225 |
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226 | #region Helpers
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227 | private void Evaluator_QualityParameter_ActualNameChanged(object sender, EventArgs e) {
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228 | //
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229 | //
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230 | }
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231 |
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232 | private void UpdateEncoders() {
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233 | IRealVectorEncoder oldEncoder = EncoderParameter.Value;
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234 | EncoderParameter.ValidValues.Clear();
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235 | List<IRealVectorEncoder> encoders = Problem.Operators.OfType<IRealVectorEncoder>().OrderBy(x => x.Name).ToList<IRealVectorEncoder>();
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236 | if (encoders.Count > 0) { // ToDo: Add wiring; else: use Position Vector directly --> name matching
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237 | foreach (IRealVectorEncoder encoder in Problem.Operators.OfType<IRealVectorEncoder>().OrderBy(x => x.Name)) {
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238 | EncoderParameter.ValidValues.Add(encoder);
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239 | ((ILookupParameter)encoder.RealVectorParameter).ActualName = "Position";
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240 | }
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241 | if (oldEncoder != null) {
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242 | IRealVectorEncoder encoder = EncoderParameter.ValidValues.FirstOrDefault(x => x.GetType() == oldEncoder.GetType());
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243 | if (encoder != null) EncoderParameter.Value = encoder;
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244 | }
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245 | }
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246 | }
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247 |
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248 | private void InitializeAnalyzers() {
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249 | qualityAnalyzer = new BestAverageWorstQualityAnalyzer();
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250 | ParameterizeAnalyzers();
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251 | }
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252 |
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253 | private void ParameterizeAnalyzers() {
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254 | qualityAnalyzer.ResultsParameter.ActualName = "Results";
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255 | if (Problem != null) {
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256 | qualityAnalyzer.MaximizationParameter.ActualName = Problem.MaximizationParameter.Name;
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257 | qualityAnalyzer.QualityParameter.ActualName = Problem.Evaluator.QualityParameter.ActualName;
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258 | qualityAnalyzer.BestKnownQualityParameter.ActualName = Problem.BestKnownQualityParameter.Name;
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259 | }
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260 | }
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261 |
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262 | private void UpdateAnalyzers() {
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263 | Analyzer.Operators.Clear();
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264 | Analyzer.Operators.Add(qualityAnalyzer);
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265 | if (Problem != null) {
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266 | foreach (IAnalyzer analyzer in Problem.Operators.OfType<IAnalyzer>().OrderBy(x => x.Name))
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267 | Analyzer.Operators.Add(analyzer);
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268 | }
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269 | }
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270 |
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271 | #endregion
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272 | }
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273 | }
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