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 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.Encodings.RealVectorEncoding;
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26 | using HeuristicLab.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 |
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30 | namespace HeuristicLab.Algorithms.ParticleSwarmOptimization {
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31 | [Item("Swarm Updater", "Updates personal best point and quality as well as global best point and quality.")]
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32 | [StorableClass]
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33 | public sealed class SwarmUpdater : SingleSuccessorOperator {
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34 | public override bool CanChangeName {
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35 | get { return false; }
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36 | }
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37 |
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38 | #region Parameter properties
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39 | public ILookupParameter<DoubleValue> QualityParameter {
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40 | get { return (ILookupParameter<DoubleValue>)Parameters["Quality"]; }
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41 | }
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42 | public ILookupParameter<DoubleValue> PersonalBestQualityParameter {
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43 | get { return (ILookupParameter<DoubleValue>)Parameters["PersonalBestQuality"]; }
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44 | }
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45 | public ILookupParameter<DoubleValue> BestQualityParameter {
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46 | get { return (ILookupParameter<DoubleValue>)Parameters["BestQuality"]; }
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47 | }
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48 | public ILookupParameter<RealVector> PointParameter {
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49 | get { return (ILookupParameter<RealVector>)Parameters["Point"]; }
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50 | }
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51 | public ILookupParameter<RealVector> PersonalBestPointParameter {
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52 | get { return (ILookupParameter<RealVector>)Parameters["PersonalBestPoint"]; }
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53 | }
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54 | public ILookupParameter<RealVector> BestPointParameter {
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55 | get { return (ILookupParameter<RealVector>)Parameters["BestPoint"]; }
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56 | }
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57 | public IValueLookupParameter<BoolValue> MaximizationParameter {
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58 | get { return (IValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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59 | }
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60 | #endregion
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61 |
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62 | #region Parameter values
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63 | private double Quality {
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64 | get { return QualityParameter.ActualValue.Value; }
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65 | }
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66 | private double PersonalBestQuality {
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67 | get { return PersonalBestQualityParameter.ActualValue.Value; }
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68 | set { PersonalBestQualityParameter.ActualValue = new DoubleValue(value); }
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69 | }
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70 | private double BestQuality {
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71 | get { return BestQualityParameter.ActualValue.Value; }
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72 | set { BestQualityParameter.ActualValue = new DoubleValue(value); }
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73 | }
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74 | private RealVector Point {
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75 | get { return PointParameter.ActualValue; }
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76 | }
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77 | private RealVector PersonalBestPoint {
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78 | get { return PersonalBestPointParameter.ActualValue; }
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79 | set { PersonalBestPointParameter.ActualValue = value; }
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80 | }
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81 | private RealVector BestPoint {
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82 | get { return BestPointParameter.ActualValue; }
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83 | set { BestPointParameter.ActualValue = value; }
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84 | }
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85 | private bool Maximization {
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86 | get { return MaximizationParameter.ActualValue.Value; }
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87 | }
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88 | #endregion
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89 |
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90 | #region Construction & Cloning
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91 |
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92 | [StorableConstructor]
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93 | private SwarmUpdater(bool deserializing) : base(deserializing) { }
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94 | private SwarmUpdater(SwarmUpdater original, Cloner cloner) : base(original, cloner) { }
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95 | public SwarmUpdater()
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96 | : base() {
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97 | Parameters.Add(new LookupParameter<DoubleValue>("Quality", "Particle's quality"));
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98 | Parameters.Add(new LookupParameter<DoubleValue>("PersonalBestQuality", "Particle's personal best quality"));
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99 | Parameters.Add(new LookupParameter<DoubleValue>("BestQuality", "Global best particle quality"));
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100 | Parameters.Add(new LookupParameter<RealVector>("Point", "Particle's position"));
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101 | Parameters.Add(new LookupParameter<RealVector>("PersonalBestPoint", "Particle's personal best position"));
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102 | Parameters.Add(new LookupParameter<RealVector>("BestPoint", "Globa best particle position"));
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103 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, otherwise false."));
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104 | }
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105 |
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106 | public override IDeepCloneable Clone(Cloner cloner) {
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107 | return new SwarmUpdater(this, cloner);
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108 | }
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109 |
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110 | #endregion
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111 |
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112 | public override IOperation Apply() {
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113 | if (Maximization && Quality > PersonalBestQuality ||
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114 | !Maximization && Quality < PersonalBestQuality) {
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115 | PersonalBestQuality = Quality;
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116 | PersonalBestPoint = Point;
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117 | if (Maximization && PersonalBestQuality > BestQuality ||
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118 | !Maximization && PersonalBestQuality < BestQuality) {
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119 | BestQuality = PersonalBestQuality;
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120 | BestPoint = PersonalBestPoint;
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121 | }
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122 | }
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123 | return base.Apply();
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124 | }
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125 | }
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126 | }
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