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 System.Drawing;
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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.Operators;
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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.Algorithms.ALPS {
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32 | [Item("LayerReseeder", "An operator that encapsulates the reseeding of the lowest layer in ALPS.")]
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33 | [StorableClass]
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34 | public sealed class LayerReseeder : SingleSuccessorOperator, IOperatorGraphOperator {
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35 | public static new Image StaticItemImage {
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36 | get { return HeuristicLab.Common.Resources.VSImageLibrary.Module; }
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37 | }
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38 | public override Image ItemImage {
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39 | get {
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40 | if (Breakpoint) return HeuristicLab.Common.Resources.VSImageLibrary.BreakpointActive;
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41 | else return base.ItemImage;
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42 | }
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43 | }
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44 |
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45 | private ILookupParameter<IntValue> GenerationsParameter {
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46 | get { return (ILookupParameter<IntValue>)Parameters["Generations"]; }
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47 | }
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48 | private ILookupParameter<IntValue> AgeGapParameter {
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49 | get { return (ILookupParameter<IntValue>)Parameters["AgeGap"]; }
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50 | }
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51 |
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52 | [Storable]
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53 | private OperatorGraph operatorGraph;
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54 | public OperatorGraph OperatorGraph {
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55 | get { return operatorGraph; }
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56 | }
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57 |
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58 | [StorableConstructor]
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59 | private LayerReseeder(bool deserializing)
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60 | : base(deserializing) { }
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61 |
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62 | private LayerReseeder(LayerReseeder original, Cloner cloner)
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63 | : base(original, cloner) {
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64 | operatorGraph = cloner.Clone(original.operatorGraph);
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65 | }
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66 | public override IDeepCloneable Clone(Cloner cloner) {
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67 | return new LayerReseeder(this, cloner);
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68 | }
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69 |
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70 | public LayerReseeder()
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71 | : base() {
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72 | Parameters.Add(new LookupParameter<IntValue>("Generations"));
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73 | Parameters.Add(new LookupParameter<IntValue>("AgeGap"));
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74 |
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75 | operatorGraph = new OperatorGraph();
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76 |
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77 | var removeIndividuals = new SubScopesRemover();
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78 | var createIndividuals = new SolutionsCreator();
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79 | var initializeAgeProsessor = new UniformSubScopesProcessor();
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80 | var initializeAge = new VariableCreator() { Name = "Initialize Age" };
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81 | var incrEvaluatedSolutionsAfterReseeding = new SubScopesCounter() { Name = "Update EvaluatedSolutions" };
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82 |
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83 | OperatorGraph.InitialOperator = removeIndividuals;
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84 |
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85 | removeIndividuals.Successor = createIndividuals;
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86 |
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87 | createIndividuals.NumberOfSolutionsParameter.ActualName = "PopulationSize";
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88 | createIndividuals.Successor = initializeAgeProsessor;
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89 |
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90 | initializeAgeProsessor.Operator = initializeAge;
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91 | initializeAgeProsessor.Successor = incrEvaluatedSolutionsAfterReseeding;
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92 |
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93 | initializeAge.CollectedValues.Add(new ValueParameter<DoubleValue>("Age", new DoubleValue(0)));
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94 | initializeAge.Successor = null;
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95 |
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96 | incrEvaluatedSolutionsAfterReseeding.ValueParameter.ActualName = "EvaluatedSolutions";
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97 | incrEvaluatedSolutionsAfterReseeding.AccumulateParameter.Value = new BoolValue(true);
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98 | incrEvaluatedSolutionsAfterReseeding.Successor = null;
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99 | }
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100 |
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101 | public override IOperation Apply() {
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102 | int generations = GenerationsParameter.ActualValue.Value;
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103 | int ageGap = AgeGapParameter.ActualValue.Value;
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104 |
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105 | var next = new OperationCollection(base.Apply());
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106 | if (generations % ageGap == 0) {
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107 | var layerZeroScope = ExecutionContext.Scope.SubScopes[0];
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108 | if (operatorGraph.InitialOperator != null)
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109 | next.Insert(0, ExecutionContext.CreateChildOperation(operatorGraph.InitialOperator, layerZeroScope));
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110 | }
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111 | return next;
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112 | }
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113 | }
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114 | } |
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