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 HeuristicLab.Common;
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24 | using HeuristicLab.Core;
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25 | using HeuristicLab.Data;
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26 | using HeuristicLab.Operators;
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27 | using HeuristicLab.Optimization;
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28 | using HeuristicLab.Parameters;
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29 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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30 |
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31 | namespace HeuristicLab.Selection {
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32 | [Item("GenderSpecificSelection", "Brings two parents together by sampling each with a different selection scheme (Wagner, S. and Affenzeller, M. 2005. SexualGA: Gender-Specific Selection for Genetic Algorithms. Proceedings of the 9th World Multi-Conference on Systemics, Cybernetics and Informatics (WMSCI), pp. 76-81).")]
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33 | [StorableClass]
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34 | public class GenderSpecificSelector : AlgorithmOperator, ISingleObjectiveSelector, IStochasticOperator {
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35 | #region Parameters
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36 | public IValueLookupParameter<BoolValue> MaximizationParameter {
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37 | get { return (IValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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38 | }
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39 | public ILookupParameter<ItemArray<DoubleValue>> QualityParameter {
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40 | get { return (ILookupParameter<ItemArray<DoubleValue>>)Parameters["Quality"]; }
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41 | }
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42 | public IValueLookupParameter<IntValue> NumberOfSelectedSubScopesParameter {
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43 | get { return (IValueLookupParameter<IntValue>)Parameters["NumberOfSelectedSubScopes"]; }
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44 | }
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45 | public IValueLookupParameter<BoolValue> CopySelectedParameter {
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46 | get { return (IValueLookupParameter<BoolValue>)Parameters["CopySelected"]; }
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47 | }
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48 | public ILookupParameter<IRandom> RandomParameter {
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49 | get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
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50 | }
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51 | public ValueParameter<ISelector> FemaleSelectorParameter {
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52 | get { return (ValueParameter<ISelector>)Parameters["FemaleSelector"]; }
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53 | }
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54 | public ValueParameter<ISelector> MaleSelectorParameter {
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55 | get { return (ValueParameter<ISelector>)Parameters["MaleSelector"]; }
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56 | }
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57 | #endregion
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58 |
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59 | #region Properties
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60 | public BoolValue Maximization {
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61 | get { return MaximizationParameter.Value; }
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62 | set { MaximizationParameter.Value = value; }
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63 | }
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64 | public IntValue NumberOfSelectedSubScopes {
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65 | get { return NumberOfSelectedSubScopesParameter.Value; }
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66 | set { NumberOfSelectedSubScopesParameter.Value = value; }
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67 | }
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68 | public BoolValue CopySelected {
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69 | get { return CopySelectedParameter.Value; }
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70 | set { CopySelectedParameter.Value = value; }
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71 | }
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72 | public ISelector FemaleSelector {
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73 | get { return FemaleSelectorParameter.Value; }
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74 | set { FemaleSelectorParameter.Value = value; }
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75 | }
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76 | public ISelector MaleSelector {
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77 | get { return MaleSelectorParameter.Value; }
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78 | set { MaleSelectorParameter.Value = value; }
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79 | }
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80 | #endregion
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81 |
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82 | [StorableConstructor]
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83 | protected GenderSpecificSelector(bool deserializing) : base(deserializing) { }
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84 | protected GenderSpecificSelector(GenderSpecificSelector original, Cloner cloner)
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85 | : base(original, cloner) {
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86 | Initialize();
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87 | }
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88 |
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89 | public GenderSpecificSelector()
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90 | : base() {
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91 | #region Create parameters
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92 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem."));
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93 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Quality", "The quality of the solutions."));
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94 | Parameters.Add(new ValueLookupParameter<IntValue>("NumberOfSelectedSubScopes", "The number of scopes that should be selected."));
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95 | Parameters.Add(new ValueLookupParameter<BoolValue>("CopySelected", "True if the scopes should be copied, false if they should be moved.", new BoolValue(true)));
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96 | Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator to use."));
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97 | Parameters.Add(new ValueParameter<ISelector>("FemaleSelector", "The selection operator to select the first parent."));
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98 | Parameters.Add(new ValueParameter<ISelector>("MaleSelector", "The selection operator to select the second parent."));
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99 | #endregion
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100 |
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101 | #region Create operators
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102 | Placeholder femaleSelector = new Placeholder();
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103 | SubScopesProcessor maleSelection = new SubScopesProcessor();
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104 | Placeholder maleSelector = new Placeholder();
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105 | EmptyOperator empty = new EmptyOperator();
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106 | RightChildReducer rightChildReducer = new RightChildReducer();
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107 | SubScopesMixer subScopesMixer = new SubScopesMixer();
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108 |
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109 | femaleSelector.OperatorParameter.ActualName = "FemaleSelector";
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110 |
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111 | maleSelector.OperatorParameter.ActualName = "MaleSelector";
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112 |
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113 | subScopesMixer.Partitions = new IntValue(2);
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114 | #endregion
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115 |
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116 | #region Create operator graph
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117 | OperatorGraph.InitialOperator = femaleSelector;
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118 | femaleSelector.Successor = maleSelection;
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119 | maleSelection.Operators.Add(maleSelector);
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120 | maleSelection.Operators.Add(empty);
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121 | maleSelection.Successor = rightChildReducer;
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122 | rightChildReducer.Successor = subScopesMixer;
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123 | #endregion
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124 |
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125 | Initialize();
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126 | }
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127 |
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128 | public override IDeepCloneable Clone(Cloner cloner) {
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129 | return new GenderSpecificSelector(this, cloner);
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130 | }
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131 |
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132 | [StorableHook(HookType.AfterDeserialization)]
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133 | private void AfterDeserialization() {
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134 | Initialize();
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135 | }
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136 |
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137 | /// <summary>
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138 | /// Sets how many sub-scopes male and female selectors should select.
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139 | /// </summary>
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140 | /// <exception cref="InvalidOperationException">Thrown when <see cref="NumberOfSelectedSubScopesParameter"/> returns an odd number.</exception>
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141 | /// <returns>Returns Apply of <see cref="AlgorithmOperator"/>.</returns>
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142 | public override IOperation Apply(IExecutionContext context) {
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143 | int count = NumberOfSelectedSubScopesParameter.ActualValue.Value;
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144 | if (count % 2 > 0) throw new InvalidOperationException(Name + ": There must be an equal number of sub-scopes to be selected.");
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145 | FemaleSelector.NumberOfSelectedSubScopesParameter.Value = new IntValue(count / 2);
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146 | MaleSelector.NumberOfSelectedSubScopesParameter.Value = new IntValue(count / 2);
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147 | return base.Apply(context);
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148 | }
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149 |
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150 | #region Events
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151 | private void SelectorParameter_ValueChanged(object sender, EventArgs e) {
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152 | IValueParameter<ISelector> selectorParam = (sender as IValueParameter<ISelector>);
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153 | if (selectorParam != null)
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154 | ParameterizeSelector(selectorParam.Value);
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155 | }
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156 | #endregion
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157 |
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158 | #region Helpers
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159 | private void Initialize() {
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160 | FemaleSelectorParameter.ValueChanged += new EventHandler(SelectorParameter_ValueChanged);
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161 | MaleSelectorParameter.ValueChanged += new EventHandler(SelectorParameter_ValueChanged);
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162 | if (FemaleSelector == null) FemaleSelector = new ProportionalSelector();
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163 | if (MaleSelector == null) MaleSelector = new RandomSelector();
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164 | }
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165 | private void ParameterizeSelector(ISelector selector) {
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166 | selector.CopySelected = new BoolValue(true);
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167 | IStochasticOperator stoOp = (selector as IStochasticOperator);
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168 | if (stoOp != null) stoOp.RandomParameter.ActualName = RandomParameter.Name;
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169 | ISingleObjectiveSelector soSelector = (selector as ISingleObjectiveSelector);
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170 | if (soSelector != null) {
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171 | soSelector.MaximizationParameter.ActualName = MaximizationParameter.Name;
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172 | soSelector.QualityParameter.ActualName = QualityParameter.Name;
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173 | }
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174 | }
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175 | #endregion
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176 | }
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177 | }
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