1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2011 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.Encodings.PermutationEncoding;
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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.Problems.QuadraticAssignment {
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31 | [StorableClass]
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32 | public class QAPEvaluator : SingleSuccessorOperator, IQAPEvaluator {
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33 |
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34 | public ILookupParameter<Permutation> PermutationParameter {
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35 | get { return (ILookupParameter<Permutation>)Parameters["Permutation"]; }
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36 | }
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37 | public ILookupParameter<DoubleMatrix> DistanceMatrixParameter {
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38 | get { return (ILookupParameter<DoubleMatrix>)Parameters["DistanceMatrix"]; }
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39 | }
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40 | public ILookupParameter<DoubleMatrix> CoordinatesParameter {
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41 | get { return (ILookupParameter<DoubleMatrix>)Parameters["Coordinates"]; }
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42 | }
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43 | public ILookupParameter<DoubleMatrix> WeightsParameter {
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44 | get { return (ILookupParameter<DoubleMatrix>)Parameters["Weights"]; }
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45 | }
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46 | public ILookupParameter<DoubleValue> QualityParameter {
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47 | get { return (ILookupParameter<DoubleValue>)Parameters["Quality"]; }
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48 | }
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49 |
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50 | [StorableConstructor]
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51 | protected QAPEvaluator(bool deserializing) : base(deserializing) { }
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52 | protected QAPEvaluator(QAPEvaluator original, Cloner cloner) : base(original, cloner) { }
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53 | public QAPEvaluator() {
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54 | Parameters.Add(new LookupParameter<Permutation>("Permutation", "The permutation that represents the current solution."));
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55 | Parameters.Add(new LookupParameter<DoubleMatrix>("DistanceMatrix", "The distance matrix that contains the distances between the locations."));
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56 | Parameters.Add(new LookupParameter<DoubleMatrix>("Coordinates", "The coordinates in case the distance matrix should not be used."));
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57 | Parameters.Add(new LookupParameter<DoubleMatrix>("Weights", "The matrix with the weights between the facilities, that is how strongly they're connected to each other."));
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58 | Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The quality value aka fitness value of the solution."));
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59 | }
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60 |
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61 | public override IDeepCloneable Clone(Cloner cloner) {
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62 | return new QAPEvaluator(this, cloner);
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63 | }
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64 |
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65 | public static double Apply(Permutation assignment, DoubleMatrix weights, DoubleMatrix distances) {
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66 | double quality = 0;
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67 | for (int i = 0; i < assignment.Length; i++) {
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68 | for (int j = 0; j < assignment.Length; j++) {
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69 | quality += weights[i, j] * distances[assignment[i], assignment[j]];
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70 | }
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71 | }
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72 | return quality;
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73 | }
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74 |
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75 | public override IOperation Apply() {
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76 | Permutation assignment = PermutationParameter.ActualValue;
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77 | DoubleMatrix weights = WeightsParameter.ActualValue;
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78 | DoubleMatrix distanceMatrix = DistanceMatrixParameter.ActualValue;
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79 |
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80 | double quality = Apply(assignment, weights, distanceMatrix);
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81 | QualityParameter.ActualValue = new DoubleValue(quality);
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82 |
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83 | return base.Apply();
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84 | }
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85 | }
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86 | }
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