1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2012 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.Collections.Generic;
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23 | using System.Linq;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.Core;
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26 | using HeuristicLab.Data;
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27 | using HeuristicLab.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.ScatterSearch {
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32 | /// <summary>
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33 | /// An operator that updates the reference set.
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34 | /// </summary>
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35 | [Item("ReferenceSetUpdateMethod", "An operator that updates the reference set.")]
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36 | [StorableClass]
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37 | public sealed class ReferenceSetUpdateMethod : SingleSuccessorOperator {
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38 | #region Parameter properties
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39 | public ScopeParameter CurrentScopeParameter {
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40 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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41 | }
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42 | public IValueLookupParameter<IntValue> ReferenceSetSizeParameter {
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43 | get { return (IValueLookupParameter<IntValue>)Parameters["ReferenceSetSize"]; }
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44 | }
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45 | public IValueLookupParameter<SimilarityCalculator> SimilarityCalculatorParameter {
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46 | get { return (IValueLookupParameter<SimilarityCalculator>)Parameters["SimilarityCalculator"]; }
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47 | }
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48 | public IValueLookupParameter<IItem> TargetParameter {
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49 | get { return (IValueLookupParameter<IItem>)Parameters["Target"]; }
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50 | }
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51 | #endregion
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52 |
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53 | #region Properties
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54 | private IScope CurrentScope {
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55 | get { return CurrentScopeParameter.ActualValue; }
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56 | }
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57 | private IntValue ReferenceSetSize {
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58 | get { return ReferenceSetSizeParameter.ActualValue; }
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59 | }
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60 | private SimilarityCalculator SimilarityCalculator {
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61 | get { return SimilarityCalculatorParameter.ActualValue; }
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62 | }
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63 | private IItem Target {
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64 | get { return TargetParameter.ActualValue; }
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65 | }
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66 | #endregion
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67 |
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68 | [StorableConstructor]
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69 | private ReferenceSetUpdateMethod(bool deserializing) : base(deserializing) { }
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70 | private ReferenceSetUpdateMethod(ReferenceSetUpdateMethod original, Cloner cloner) : base(original, cloner) { }
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71 | public ReferenceSetUpdateMethod()
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72 | : base() {
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73 | #region Create parameters
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74 | Parameters.Add(new ScopeParameter("CurrentScope"));
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75 | Parameters.Add(new ValueLookupParameter<IntValue>("ReferenceSetSize"));
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76 | Parameters.Add(new ValueLookupParameter<SimilarityCalculator>("SimilarityCalculator"));
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77 | Parameters.Add(new ValueLookupParameter<IItem>("Target"));
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78 | #endregion
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79 | }
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80 |
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81 | public override IDeepCloneable Clone(Cloner cloner) {
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82 | return new ReferenceSetUpdateMethod(this, cloner);
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83 | }
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84 |
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85 | public override IOperation Apply() {
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86 | IDictionary<IScope, double> population = new Dictionary<IScope, double>();
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87 | foreach (var pScope in CurrentScope.SubScopes[0].SubScopes) {
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88 | double similarity = 0;
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89 | foreach (var rScope in CurrentScope.SubScopes[1].SubScopes) {
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90 | similarity += SimilarityCalculator.ExecuteCalculation(pScope, rScope);
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91 | }
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92 | population[pScope] = similarity;
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93 | }
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94 | int numberOfHighQualitySolutions = CurrentScope.SubScopes[1].SubScopes.Count;
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95 | foreach (var entry in population.OrderBy(x => x.Value).Take(ReferenceSetSize.Value - numberOfHighQualitySolutions)) {
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96 | CurrentScope.SubScopes[1].SubScopes.Add(entry.Key);
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97 | CurrentScope.SubScopes[0].SubScopes.Remove(entry.Key);
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98 | }
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99 | return base.Apply();
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100 | }
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101 | }
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102 | }
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