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.PermutationEncoding {
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31 | [Item("ThreeOptPreventEdgeRemoval", "Prevents deleting of previously added edges.")]
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32 | [StorableClass]
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33 | public class PreventDeleteThreeOptTabuMoveEvaluator : SingleSuccessorOperator, IThreeOptPermutationMoveOperator, ITabuMoveEvaluator {
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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<ThreeOptMove> ThreeOptMoveParameter {
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38 | get { return (LookupParameter<ThreeOptMove>)Parameters["ThreeOptMove"]; }
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39 | }
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40 | public ILookupParameter<Permutation> PermutationParameter {
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41 | get { return (LookupParameter<Permutation>)Parameters["Permutation"]; }
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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 | private ScopeParameter CurrentScopeParameter {
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50 | get { return (ScopeParameter)Parameters["CurrentScope"]; }
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51 | }
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52 |
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53 | public PreventDeleteThreeOptTabuMoveEvaluator()
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54 | : base() {
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55 | Parameters.Add(new LookupParameter<ThreeOptMove>("ThreeOptMove", "The move to evaluate."));
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56 | Parameters.Add(new LookupParameter<BoolValue>("MoveTabu", "The variable to store if a move was tabu."));
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57 | Parameters.Add(new LookupParameter<Permutation>("Permutation", "The solution as permutation."));
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58 | Parameters.Add(new LookupParameter<ItemList<IItem>>("TabuList", "The tabu list."));
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59 | Parameters.Add(new ScopeParameter("CurrentScope", "The current scope."));
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60 | }
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61 |
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62 | public override IOperation Apply() {
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63 | ItemList<IItem> tabuList = TabuListParameter.ActualValue;
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64 | ThreeOptMove move = ThreeOptMoveParameter.ActualValue;
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65 | Permutation permutation = PermutationParameter.ActualValue;
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66 | int length = permutation.Length;
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67 | int E1S = permutation.GetCircular(move.Index1 - 1);
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68 | int E1T = permutation[move.Index1];
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69 | int E2S = permutation[move.Index2];
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70 | int E2T = permutation.GetCircular(move.Index2 + 1);
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71 | int E3S, E3T;
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72 | if (move.Index3 > move.Index1) {
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73 | E3S = permutation.GetCircular(move.Index3 + move.Index2 - move.Index1);
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74 | E3T = permutation.GetCircular(move.Index3 + move.Index2 - move.Index1 + 1);
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75 | } else {
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76 | E3S = permutation.GetCircular(move.Index3 - 1);
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77 | E3T = permutation[move.Index3];
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78 | }
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79 | bool isTabu = (move.Index1 == move.Index3
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80 | || move.Index2 - move.Index1 >= permutation.Length - 2
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81 | || move.Index1 == permutation.Length - 1 && move.Index3 == 0
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82 | || move.Index3 == permutation.Length - 1 && move.Index1 == 0);
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83 | if (!isTabu) {
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84 | foreach (IItem tabuMove in tabuList) {
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85 | ThreeOptTabuMoveAttribute attribute = (tabuMove as ThreeOptTabuMoveAttribute);
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86 | if (attribute != null) {
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87 | // if previously added Edge3Source-Edge1Target is deleted
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88 | if (attribute.Edge3Source == E1S && attribute.Edge1Target == E1T || attribute.Edge3Source == E1T && attribute.Edge1Target == E1S
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89 | || attribute.Edge3Source == E2S && attribute.Edge1Target == E2T || attribute.Edge3Source == E2T && attribute.Edge1Target == E2S
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90 | || attribute.Edge3Source == E3S && attribute.Edge1Target == E3T || attribute.Edge3Source == E3T && attribute.Edge1Target == E3S
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91 | // if previously added Edge2Source-Edge3Target is deleted
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92 | || attribute.Edge2Source == E1S && attribute.Edge3Target == E1T || attribute.Edge2Source == E1T && attribute.Edge3Target == E1S
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93 | || attribute.Edge2Source == E2S && attribute.Edge3Target == E2T || attribute.Edge2Source == E2T && attribute.Edge3Target == E2S
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94 | || attribute.Edge2Source == E3S && attribute.Edge3Target == E3T || attribute.Edge2Source == E3T && attribute.Edge3Target == E3S
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95 | // if previously added Edge1Source-Edge2Target is deleted
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96 | || attribute.Edge1Source == E1S && attribute.Edge2Target == E1T || attribute.Edge1Source == E1T && attribute.Edge2Target == E1S
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97 | || attribute.Edge1Source == E2S && attribute.Edge2Target == E2T || attribute.Edge1Source == E2T && attribute.Edge2Target == E2S
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98 | || attribute.Edge1Source == E3S && attribute.Edge2Target == E3T || attribute.Edge1Source == E3T && attribute.Edge2Target == E3S) {
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99 | isTabu = true;
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100 | break;
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101 | }
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102 | }
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103 | }
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104 | }
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105 | MoveTabuParameter.ActualValue = new BoolValue(isTabu);
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106 | return base.Apply();
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107 | }
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108 | }
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109 | }
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