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.Linq;
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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.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.ScatterSearch {
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31 | /// <summary>
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32 | /// An operator that updates a population.
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33 | /// </summary>
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34 | [Item("PopulationRebuildMethod", "An operator that rebuilds the population.")]
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35 | [StorableClass]
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36 | public sealed class PopulationRebuildMethod : SingleSuccessorOperator {
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37 | #region Parameter properties
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38 | private ScopeParameter CurrentScopeParameter {
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39 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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40 | }
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41 | public ValueLookupParameter<IntValue> NumberOfHighQualitySolutionsParameter {
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42 | get { return (ValueLookupParameter<IntValue>)Parameters["NumberOfHighQualitySolutions"]; }
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43 | }
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44 | public ValueLookupParameter<IntValue> ReferenceSetSizeParameter {
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45 | get { return (ValueLookupParameter<IntValue>)Parameters["ReferenceSetSize"]; }
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46 | }
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47 | #endregion
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48 |
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49 | #region Properties
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50 | public IScope CurrentScope {
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51 | get { return CurrentScopeParameter.ActualValue; }
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52 | }
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53 | public IntValue NumberOfHighQualitySolutions {
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54 | get { return NumberOfHighQualitySolutionsParameter.ActualValue; }
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55 | set { NumberOfHighQualitySolutionsParameter.ActualValue = value; }
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56 | }
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57 | public IntValue ReferenceSetSize {
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58 | get { return ReferenceSetSizeParameter.ActualValue; }
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59 | set { ReferenceSetSizeParameter.ActualValue = value; }
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60 | }
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61 | #endregion
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62 |
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63 | [StorableConstructor]
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64 | private PopulationRebuildMethod(bool deserializing) : base(deserializing) { }
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65 | private PopulationRebuildMethod(PopulationRebuildMethod original, Cloner cloner) : base(original, cloner) { }
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66 | public PopulationRebuildMethod() : base() { Initialize(); }
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67 |
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68 | public override IDeepCloneable Clone(Cloner cloner) {
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69 | return new PopulationRebuildMethod(this, cloner);
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70 | }
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71 |
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72 | private void Initialize() {
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73 | #region Create parameters
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74 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope to which the new solutions are added as sub-scopes."));
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75 | Parameters.Add(new ValueLookupParameter<IntValue>("NumberOfHighQualitySolutions", "The number of high quality solutions that should be added to the reference set."));
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76 | Parameters.Add(new ValueLookupParameter<IntValue>("ReferenceSetSize", "The size of the reference set."));
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77 | #endregion
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78 |
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79 | #region Create operators
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80 | #endregion
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81 |
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82 | #region Create operator graph
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83 | #endregion
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84 | }
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85 |
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86 | public override IOperation Apply() {
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87 | IScope population = CurrentScope.SubScopes[0];
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88 | IScope refSet = CurrentScope.SubScopes[1];
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89 | refSet.SubScopes.Replace(refSet.SubScopes.OrderByDescending(r => r.Variables["Quality"].Value)
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90 | .Take(NumberOfHighQualitySolutions.Value).ToList());
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91 | population.SubScopes.Clear();
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92 | return base.Apply();
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93 | }
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94 | }
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95 | }
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