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 the solution pool.
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33 | /// </summary>
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34 | [Item("SolutionPoolUpdateMethod", "An operator that updates the solution pool.")]
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35 | [StorableClass]
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36 | public sealed class SolutionPoolUpdateMethod : 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 | private ValueLookupParameter<BoolValue> NewSolutionsParameter {
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42 | get { return (ValueLookupParameter<BoolValue>)Parameters["NewSolutions"]; }
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43 | }
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44 | private 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 | private IScope CurrentScope {
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51 | get { return CurrentScopeParameter.ActualValue; }
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52 | }
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53 | private BoolValue NewSolutions {
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54 | get { return NewSolutionsParameter.ActualValue; }
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55 | }
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56 | private IntValue ReferenceSetSize {
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57 | get { return ReferenceSetSizeParameter.ActualValue; }
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58 | set { ReferenceSetSizeParameter.ActualValue = value; }
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59 | }
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60 | #endregion
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61 |
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62 | [StorableConstructor]
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63 | private SolutionPoolUpdateMethod(bool deserializing) : base(deserializing) { }
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64 | private SolutionPoolUpdateMethod(SolutionPoolUpdateMethod original, Cloner cloner) : base(original, cloner) { }
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65 | public SolutionPoolUpdateMethod() : base() { Initialize(); }
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66 |
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67 | public override IDeepCloneable Clone(Cloner cloner) {
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68 | return new SolutionPoolUpdateMethod(this, cloner);
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69 | }
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70 |
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71 | private void Initialize() {
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72 | #region Create parameters
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73 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope to which the new solutions are added as sub-scopes."));
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74 | Parameters.Add(new ValueLookupParameter<BoolValue>("NewSolutions", "Indicates if new solutions have been found."));
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75 | Parameters.Add(new ValueLookupParameter<IntValue>("ReferenceSetSize", "The size of the reference set."));
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76 | #endregion
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77 |
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78 | #region Create operators
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79 | #endregion
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80 |
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81 | #region Create operator graph
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82 | #endregion
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83 | }
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84 |
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85 | public override IOperation Apply() {
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86 | IScope parents = new Scope("Parents");
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87 | IScope offspring = new Scope("Offspring");
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88 | foreach (var scope in CurrentScope.SubScopes) {
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89 | parents.SubScopes.AddRange(scope.SubScopes.Take(scope.SubScopes.Count - 1));
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90 | offspring.SubScopes.AddRange(scope.SubScopes.Last().SubScopes);
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91 | }
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92 | CurrentScope.SubScopes.Clear();
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93 | CurrentScope.SubScopes.AddRange(parents.SubScopes.OrderByDescending(o => o.Variables["Quality"].Value));
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94 | if ((offspring.SubScopes.OrderByDescending(o => o.Variables["Quality"].Value).First().Variables["Quality"].Value as DoubleValue).Value
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95 | > (parents.SubScopes.OrderByDescending(o => o.Variables["Quality"].Value).First().Variables["Quality"].Value as DoubleValue).Value) {
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96 | CurrentScope.SubScopes.Replace(CurrentScope.SubScopes.Union(offspring.SubScopes).OrderByDescending(o => o.Variables["Quality"].Value).Take(ReferenceSetSize.Value));
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97 | NewSolutions.Value = true;
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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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