1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 Joseph Helm and 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.PackingEncoding;
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26 | using HeuristicLab.Operators;
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27 | using HeuristicLab.Optimization;
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28 | using HeuristicLab.Parameters;
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29 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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30 |
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31 | namespace HeuristicLab.Problems.BinPacking {
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32 | [Item("PackingMoveEvaluator", "A base class for operators which evaluate Packing-Solution moves.")]
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33 | [StorableClass]
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34 | public abstract class PackingMoveEvaluator<D, B, I> : SingleSuccessorOperator, IPackingMoveEvaluator, IMoveOperator
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35 | where D : class, IPackingPosition
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36 | where B : PackingShape<D>
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37 | where I : PackingShape<D>, IPackingItem {
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38 | public override bool CanChangeName {
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39 | get { return false; }
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40 | }
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41 |
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42 | public ILookupParameter<DoubleValue> QualityParameter {
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43 | get { return (ILookupParameter<DoubleValue>)Parameters["Quality"]; }
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44 | }
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45 | public ILookupParameter<DoubleValue> MoveQualityParameter {
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46 | get { return (ILookupParameter<DoubleValue>)Parameters["MoveQuality"]; }
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47 | }
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48 | public ILookupParameter<ItemList<I>> PackingItemMeasuresParameter {
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49 | get { return (LookupParameter<ItemList<I>>)Parameters["PackingItemMeasures"]; }
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50 | }
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51 | public ILookupParameter<B> PackingBinMeasuresParameter {
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52 | get { return (LookupParameter<B>)Parameters["PackingBinMeasures"]; }
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53 | }
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54 | public IValueLookupParameter<IPackingSolutionDecoder> PackingSolutionDecoderParameter {
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55 | get { return (IValueLookupParameter<IPackingSolutionDecoder>)Parameters["PackingSolutionDecoder"]; }
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56 | }
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57 | public IValueLookupParameter<IEvaluator> PackingPlanEvaluatorParameter {
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58 | get { return (IValueLookupParameter<IEvaluator>)Parameters["PackingPlanEvaluator"]; }
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59 | }
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60 | protected ScopeParameter CurrentScopeParameter {
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61 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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62 | }
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63 | public ILookupParameter<IPackingMove> PackingMoveParameter {
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64 | get { return (ILookupParameter<IPackingMove>)Parameters["PackingMove"]; }
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65 | }
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66 |
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67 | [StorableConstructor]
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68 | protected PackingMoveEvaluator(bool deserializing) : base(deserializing) { }
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69 | protected PackingMoveEvaluator(PackingMoveEvaluator<D, B, I> original, Cloner cloner) : base(original, cloner) { }
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70 | protected PackingMoveEvaluator()
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71 | : base() {
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72 | Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The quality of a packing solution."));
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73 | Parameters.Add(new LookupParameter<DoubleValue>("MoveQuality", "The evaluated quality of a move on a packing solution."));
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74 | Parameters.Add(new LookupParameter<ItemList<I>>("PackingItemMeasures", "Packing-item data taken from the bin-packing problem-instance."));
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75 | Parameters.Add(new LookupParameter<B>("PackingBinMeasures", "Packing-bin data taken from the bin-packing problem-instance."));
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76 | Parameters.Add(new ValueLookupParameter<IPackingSolutionDecoder>("PackingSolutionDecoder", "The decoding operator that is used to calculate a packing plan from the used representation."));
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77 | Parameters.Add(new ValueLookupParameter<IEvaluator>("PackingPlanEvaluator", "The actual packing plan evaluation operator."));
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78 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope where the decoded solution should be added to."));
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79 | Parameters.Add(new LookupParameter<IPackingMove>("PackingMove", "The move to evaluate."));
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80 | }
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81 |
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82 |
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83 |
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84 | public override IOperation Apply() {
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85 | IPackingMove move = PackingMoveParameter.ActualValue;
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86 | IPackingSolutionEncoding newSolution = move.GetSolutionAfterMove();
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87 | CurrentScopeParameter.ActualValue.Variables.Add(new Variable("MovedSolution", newSolution));
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88 |
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89 | PackingPlan<D, B, I> packingPlan = (PackingSolutionDecoderParameter.ActualValue as PackingSolutionDecoder<D, B, I>).
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90 | CreatePackingPlanFromEncoding(newSolution, PackingBinMeasuresParameter.ActualValue, PackingItemMeasuresParameter.ActualValue);
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91 |
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92 |
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93 | CurrentScopeParameter.ActualValue.Variables.Add(new Variable("PackingPlanAfterMove", packingPlan));
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94 |
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95 | DoubleValue quality = PackingRatioEvaluator<D, B, I>.CalculatePackingRatio(packingPlan);
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96 |
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97 | double moveQuality = quality.Value;
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98 |
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99 | if (MoveQualityParameter.ActualValue == null) MoveQualityParameter.ActualValue = new DoubleValue(moveQuality);
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100 | else MoveQualityParameter.ActualValue.Value = moveQuality;
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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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