1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2016 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.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.Analysis {
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31 | /// <summary>
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32 | /// An operator that updates the best quality found so far with those qualities contained in the scope tree.
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33 | /// </summary>
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34 | [Item("BestQualityMemorizer", "An operator that updates the best quality found so far with those qualities contained in the scope tree.")]
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35 | [StorableClass]
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36 | public class BestQualityMemorizer : SingleSuccessorOperator, ISingleObjectiveOperator {
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37 | public ValueLookupParameter<BoolValue> MaximizationParameter {
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38 | get { return (ValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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39 | }
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40 | public ScopeTreeLookupParameter<DoubleValue> QualityParameter {
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41 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Quality"]; }
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42 | }
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43 | public ValueLookupParameter<DoubleValue> BestQualityParameter {
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44 | get { return (ValueLookupParameter<DoubleValue>)Parameters["BestQuality"]; }
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45 | }
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46 |
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47 | #region Storing & Cloning
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48 | [StorableConstructor]
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49 | protected BestQualityMemorizer(bool deserializing) : base(deserializing) { }
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50 | protected BestQualityMemorizer(BestQualityMemorizer original, Cloner cloner) : base(original, cloner) { }
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51 | public override IDeepCloneable Clone(Cloner cloner) {
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52 | return new BestQualityMemorizer(this, cloner);
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53 | }
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54 | #endregion
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55 | public BestQualityMemorizer()
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56 | : base() {
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57 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the current problem is a maximization problem, otherwise false."));
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58 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Quality", "The value contained in the scope tree which represents the solution quality."));
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59 | Parameters.Add(new ValueLookupParameter<DoubleValue>("BestQuality", "The quality value of the best solution."));
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60 | }
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61 |
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62 | public override IOperation Apply() {
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63 | ItemArray<DoubleValue> qualities = QualityParameter.ActualValue;
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64 | bool maximization = MaximizationParameter.ActualValue.Value;
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65 | DoubleValue best = BestQualityParameter.ActualValue;
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66 | double max = (best != null) ? (best.Value) : ((maximization) ? (double.MinValue) : (double.MaxValue));
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67 |
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68 | foreach (DoubleValue quality in qualities)
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69 | if (IsBetter(maximization, quality.Value, max)) max = quality.Value;
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70 |
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71 | if (best == null) BestQualityParameter.ActualValue = new DoubleValue(max);
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72 | else best.Value = max;
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73 | return base.Apply();
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74 | }
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75 |
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76 | private bool IsBetter(bool maximization, double quality, double max) {
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77 | return (maximization && quality > max || !maximization && quality < max);
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78 | }
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79 | }
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80 | }
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