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 System;
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23 | using HeuristicLab.Core;
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24 | using HeuristicLab.Data;
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25 | using HeuristicLab.Operators;
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26 | using HeuristicLab.Optimization;
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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.Encodings.RealVectorEncoding {
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31 | [Item("AdditiveMoveTabuChecker", "Prevents falling back into ranges that have been moved over before.")]
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32 | [StorableClass]
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33 | public class AdditiveMoveTabuChecker : SingleSuccessorOperator, IAdditiveRealVectorMoveOperator, ITabuChecker {
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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 | public ILookupParameter<AdditiveMove> AdditiveMoveParameter {
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38 | get { return (LookupParameter<AdditiveMove>)Parameters["AdditiveMove"]; }
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39 | }
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40 | public ILookupParameter<RealVector> RealVectorParameter {
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41 | get { return (LookupParameter<RealVector>)Parameters["RealVector"]; }
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42 | }
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43 | public ILookupParameter<ItemList<IItem>> TabuListParameter {
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44 | get { return (ILookupParameter<ItemList<IItem>>)Parameters["TabuList"]; }
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45 | }
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46 | public ILookupParameter<BoolValue> MoveTabuParameter {
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47 | get { return (ILookupParameter<BoolValue>)Parameters["MoveTabu"]; }
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48 | }
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49 | public IValueLookupParameter<BoolValue> MaximizationParameter {
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50 | get { return (IValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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51 | }
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52 | public ILookupParameter<DoubleValue> MoveQualityParameter {
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53 | get { return (ILookupParameter<DoubleValue>)Parameters["MoveQuality"]; }
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54 | }
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55 | public ValueParameter<BoolValue> UseAspirationCriterionParameter {
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56 | get { return (ValueParameter<BoolValue>)Parameters["UseAspirationCriterion"]; }
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57 | }
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58 |
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59 | public BoolValue UseAspirationCriterion {
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60 | get { return UseAspirationCriterionParameter.Value; }
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61 | set { UseAspirationCriterionParameter.Value = value; }
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62 | }
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63 |
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64 |
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65 | public AdditiveMoveTabuChecker()
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66 | : base() {
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67 | Parameters.Add(new LookupParameter<AdditiveMove>("AdditiveMove", "The move to evaluate."));
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68 | Parameters.Add(new LookupParameter<BoolValue>("MoveTabu", "The variable to store if a move was tabu."));
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69 | Parameters.Add(new LookupParameter<RealVector>("RealVector", "The solution as real vector."));
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70 | Parameters.Add(new LookupParameter<ItemList<IItem>>("TabuList", "The tabu list."));
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71 | Parameters.Add(new ValueParameter<BoolValue>("UseAspirationCriterion", "Whether to use the aspiration criterion or not.", new BoolValue(true)));
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72 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, else if it is a minimization problem."));
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73 | Parameters.Add(new LookupParameter<DoubleValue>("MoveQuality", "The quality of the current move."));
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74 | }
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75 |
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76 | public override IOperation Apply() {
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77 | ItemList<IItem> tabuList = TabuListParameter.ActualValue;
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78 | AdditiveMove move = AdditiveMoveParameter.ActualValue;
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79 | RealVector vector = RealVectorParameter.ActualValue;
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80 | double moveQuality = MoveQualityParameter.ActualValue.Value;
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81 | bool maximization = MaximizationParameter.ActualValue.Value;
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82 | bool useAspiration = UseAspirationCriterion.Value;
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83 | bool isTabu = false;
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84 | foreach (IItem tabuMove in tabuList) {
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85 | AdditiveMoveTabuAttribute attribute = (tabuMove as AdditiveMoveTabuAttribute);
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86 | if (attribute != null && attribute.Dimension == move.Dimension) {
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87 | if (!useAspiration
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88 | || maximization && moveQuality <= attribute.MoveQuality
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89 | || !maximization && moveQuality >= attribute.MoveQuality) {
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90 |
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91 | double newPos = vector[move.Dimension] + move.MoveDistance;
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92 | if (Math.Min(attribute.MovedPosition, attribute.OriginalPosition) < newPos
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93 | && newPos < Math.Max(attribute.MovedPosition, attribute.OriginalPosition)) {
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94 | isTabu = true;
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95 | break;
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96 | }
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97 | }
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98 | }
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99 | }
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100 | MoveTabuParameter.ActualValue = new BoolValue(isTabu);
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101 | return base.Apply();
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102 | }
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103 | }
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104 | }
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