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 System.Collections.Generic;
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23 | using HeuristicLab.Common;
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24 | using HeuristicLab.Core;
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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 | using HeuristicLab.Problems.BinPacking.Interfaces;
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30 |
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31 | namespace HeuristicLab.Encodings.PackingEncoding.MultiComponentVector {
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32 | [Item("MultiComponentVectorMoveGenerator", "Base class for all multi-component vector move generators.")]
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33 | [StorableClass]
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34 | public abstract class MultiComponentVectorMoveGenerator : SingleSuccessorOperator, IMultiComponentVectorMoveOperator, IMoveGenerator {
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35 | public override bool CanChangeName {
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36 | get { return false; }
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37 | }
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38 | public ILookupParameter<MultiComponentVectorEncoding> MultiComponentVectorParameter {
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39 | get { return (ILookupParameter<MultiComponentVectorEncoding>)Parameters["MultiComponentVector"]; }
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40 | }
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41 | public ILookupParameter<IPackingMove> PackingMoveParameter {
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42 | get { return (LookupParameter<IPackingMove>)Parameters["PackingMove"]; }
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43 | }
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44 | protected ScopeParameter CurrentScopeParameter {
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45 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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46 | }
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47 |
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48 |
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49 | [StorableConstructor]
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50 | protected MultiComponentVectorMoveGenerator(bool deserializing) : base(deserializing) { }
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51 | protected MultiComponentVectorMoveGenerator(MultiComponentVectorMoveGenerator original, Cloner cloner) : base(original, cloner) { }
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52 | public MultiComponentVectorMoveGenerator()
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53 | : base() {
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54 | Parameters.Add(new LookupParameter<MultiComponentVectorEncoding>("MultiComponentVector", "The multi component vector for which moves should be generated."));
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55 | Parameters.Add(new LookupParameter<IPackingMove>("PackingMove", "The moves that should be generated in subscopes."));
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56 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope where the moves should be added as subscopes."));
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57 | }
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58 |
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59 |
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60 | public static int NrOfRotationMoves(MultiComponentVectorEncoding mcv) {
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61 | return mcv.NrOfItems;
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62 | }
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63 | public static IEnumerable<MultiComponentVectorMove> GenerateRotationMoves(MultiComponentVectorEncoding multiComponentVector) {
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64 | for (int binNr = 0; binNr < multiComponentVector.PackingInformations.Count; binNr++)
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65 | for (int index = 0; index < multiComponentVector.PackingInformations[binNr].Count; index++)
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66 | yield return new SingleItemRotationMove(binNr, index, multiComponentVector);
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67 | }
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68 |
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69 | public static int NrOfSingleGroupingMoves(MultiComponentVectorEncoding mcv) {
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70 | return mcv.NrOfItems * (mcv.NrOfBins - 1);
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71 | }
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72 | public static IEnumerable<MultiComponentVectorMove> GenerateSingleGroupingMoves(MultiComponentVectorEncoding multiComponentVector) {
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73 | for (int oldBin = 0; oldBin < multiComponentVector.PackingInformations.Count; oldBin++)
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74 | for (int index = 0; index < multiComponentVector.PackingInformations[oldBin].Count; index++)
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75 | for (int newBin = 0; newBin < multiComponentVector.NrOfBins; newBin++)
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76 | if (newBin != oldBin)
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77 | yield return new SingleGroupingMove(oldBin, index, newBin, multiComponentVector);
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78 | }
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79 |
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80 | public static int NrOfSwapPositionMoves(MultiComponentVectorEncoding mcv) {
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81 | int nrOfSwapPositionMoves = 0;
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82 | foreach (var groupInformations in mcv.PackingInformations) {
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83 | nrOfSwapPositionMoves += (groupInformations.Value.Count * (groupInformations.Value.Count - 1)) / 2;
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84 | }
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85 | return nrOfSwapPositionMoves;
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86 | }
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87 | public static IEnumerable<MultiComponentVectorMove> GenerateSwapPositionMoves(MultiComponentVectorEncoding multiComponentVector) {
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88 | for (int bin = 0; bin < multiComponentVector.PackingInformations.Count; bin++)
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89 | for (int oldIndex = 0; oldIndex < multiComponentVector.PackingInformations[bin].Count - 1; oldIndex++)
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90 | for (int newIndex = oldIndex + 1; newIndex < multiComponentVector.PackingInformations[bin].Count; newIndex++)
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91 | yield return new SwapPositionMove(bin, oldIndex, newIndex, multiComponentVector);
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92 | }
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93 |
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94 | public static int NrOfChangePositionMoves(MultiComponentVectorEncoding mcv) {
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95 | int nrOfChangePositionMoves = 0;
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96 | foreach (var groupInformations in mcv.PackingInformations) {
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97 | nrOfChangePositionMoves += (groupInformations.Value.Count * (groupInformations.Value.Count - 1)) / 2;
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98 | }
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99 | return nrOfChangePositionMoves;
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100 | }
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101 | public static IEnumerable<MultiComponentVectorMove> GenerateChangePositionMoves(MultiComponentVectorEncoding multiComponentVector) {
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102 | for (int bin = 0; bin < multiComponentVector.PackingInformations.Count; bin++)
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103 | for (int oldIndex = 0; oldIndex < multiComponentVector.PackingInformations[bin].Count - 1; oldIndex++)
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104 | for (int newIndex = oldIndex + 1; newIndex < multiComponentVector.PackingInformations[bin].Count; newIndex++)
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105 | yield return new ChangePositionMove(bin, oldIndex, newIndex, multiComponentVector);
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106 | }
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107 |
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108 | public override IOperation Apply() {
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109 | MultiComponentVectorEncoding mcv = MultiComponentVectorParameter.ActualValue;
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110 | MultiComponentVectorMove[] moves = GenerateMoves(mcv);
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111 | Scope[] moveScopes = new Scope[moves.Length];
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112 | for (int i = 0; i < moveScopes.Length; i++) {
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113 | moveScopes[i] = new Scope(i.ToString());
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114 | moveScopes[i].Variables.Add(new Variable(PackingMoveParameter.ActualName, moves[i]));
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115 | }
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116 | CurrentScopeParameter.ActualValue.SubScopes.AddRange(moveScopes);
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117 | return base.Apply();
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118 | }
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119 |
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120 | protected abstract MultiComponentVectorMove[] GenerateMoves(MultiComponentVectorEncoding multiComponentVector);
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121 | }
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122 | }
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