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source: branches/1888_OaaS/HeuristicLab.Encodings.PermutationEncoding/3.3/Moves/TwoOpt/InversionMoveSoftTabuCriterion.cs @ 18242

Last change on this file since 18242 was 7259, checked in by swagner, 13 years ago

Updated year of copyrights to 2012 (#1716)
File size: 8.4 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Data;
26using HeuristicLab.Operators;
27using HeuristicLab.Optimization;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.Encodings.PermutationEncoding {
32  [Item("InversionMoveSoftTabuCriterion", @"For relative postion encoded permutations it just prevents readding of previously deleted edges, but allows deleting previously added edges.
33  For absolute position encoded permutations it prevents moving a number to a position it has previously occupied.
34
35If the aspiration condition is activated, a move will not be considered tabu against a move in the tabu list if it leads to a better solution than the quality recorded with the move in the tabu list.")]
36  [StorableClass]
37  public class InversionMoveSoftTabuCriterion : SingleSuccessorOperator, IPermutationInversionMoveOperator, ITabuChecker {
38    public override bool CanChangeName {
39      get { return false; }
40    }
41    public ILookupParameter<InversionMove> InversionMoveParameter {
42      get { return (LookupParameter<InversionMove>)Parameters["InversionMove"]; }
43    }
44    public ILookupParameter<Permutation> PermutationParameter {
45      get { return (LookupParameter<Permutation>)Parameters["Permutation"]; }
46    }
47    public ILookupParameter<ItemList<IItem>> TabuListParameter {
48      get { return (ILookupParameter<ItemList<IItem>>)Parameters["TabuList"]; }
49    }
50    public ILookupParameter<BoolValue> MoveTabuParameter {
51      get { return (ILookupParameter<BoolValue>)Parameters["MoveTabu"]; }
52    }
53    public IValueLookupParameter<BoolValue> MaximizationParameter {
54      get { return (IValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
55    }
56    public ILookupParameter<DoubleValue> MoveQualityParameter {
57      get { return (ILookupParameter<DoubleValue>)Parameters["MoveQuality"]; }
58    }
59    public ValueParameter<BoolValue> UseAspirationCriterionParameter {
60      get { return (ValueParameter<BoolValue>)Parameters["UseAspirationCriterion"]; }
61    }
62
63    public BoolValue UseAspirationCriterion {
64      get { return UseAspirationCriterionParameter.Value; }
65      set { UseAspirationCriterionParameter.Value = value; }
66    }
67
68    [StorableConstructor]
69    protected InversionMoveSoftTabuCriterion(bool deserializing) : base(deserializing) { }
70    protected InversionMoveSoftTabuCriterion(InversionMoveSoftTabuCriterion original, Cloner cloner) : base(original, cloner) { }
71    public InversionMoveSoftTabuCriterion()
72      : base() {
73      Parameters.Add(new LookupParameter<InversionMove>("InversionMove", "The move to evaluate."));
74      Parameters.Add(new LookupParameter<BoolValue>("MoveTabu", "The variable to store if a move was tabu."));
75      Parameters.Add(new LookupParameter<Permutation>("Permutation", "The solution as permutation."));
76      Parameters.Add(new LookupParameter<ItemList<IItem>>("TabuList", "The tabu list."));
77      Parameters.Add(new ValueParameter<BoolValue>("UseAspirationCriterion", "Whether to use the aspiration criterion or not.", new BoolValue(true)));
78      Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, else if it is a minimization problem."));
79      Parameters.Add(new LookupParameter<DoubleValue>("MoveQuality", "The quality of the current move."));
80    }
81
82    public override IDeepCloneable Clone(Cloner cloner) {
83      return new InversionMoveSoftTabuCriterion(this, cloner);
84    }
85
86    public override IOperation Apply() {
87      ItemList<IItem> tabuList = TabuListParameter.ActualValue;
88      InversionMove move = InversionMoveParameter.ActualValue;
89      Permutation permutation = PermutationParameter.ActualValue;
90      int length = permutation.Length;
91      double moveQuality = MoveQualityParameter.ActualValue.Value;
92      bool maximization = MaximizationParameter.ActualValue.Value;
93      bool useAspiration = UseAspirationCriterion.Value;
94      bool isTabu = false;
95
96      foreach (IItem tabuMove in tabuList) {
97        PermutationMoveAttribute attrib = (tabuMove as PermutationMoveAttribute);
98        if (!useAspiration
99          || maximization && moveQuality <= attrib.MoveQuality
100          || !maximization && moveQuality >= attrib.MoveQuality) {
101          switch (permutation.PermutationType) {
102            case PermutationTypes.RelativeUndirected: {
103                int E1S = permutation.GetCircular(move.Index1 - 1);
104                int E1T = permutation[move.Index1];
105                int E2S = permutation[move.Index2];
106                int E2T = permutation.GetCircular(move.Index2 + 1);
107                InversionMoveRelativeAttribute relAttrib = (attrib as InversionMoveRelativeAttribute);
108                if (relAttrib != null) {
109                  // if previously deleted Edge1Source-Target is readded
110                  if (relAttrib.Edge1Source == E1S && relAttrib.Edge1Target == E2S || relAttrib.Edge1Source == E2S && relAttrib.Edge1Target == E1S
111                    || relAttrib.Edge1Source == E1T && relAttrib.Edge1Target == E2T || relAttrib.Edge1Source == E2T && relAttrib.Edge1Target == E1T
112                    // if previously deleted Edge2Source-Target is readded
113                    || relAttrib.Edge2Source == E1T && relAttrib.Edge2Target == E2T || relAttrib.Edge2Source == E2T && relAttrib.Edge2Target == E1T
114                    || relAttrib.Edge2Source == E1S && relAttrib.Edge2Target == E2S || relAttrib.Edge2Source == E2S && relAttrib.Edge2Target == E1S) {
115                    isTabu = true;
116                  }
117                }
118              }
119              break;
120            case PermutationTypes.RelativeDirected: {
121                int E1S = permutation.GetCircular(move.Index1 - 1);
122                int E1T = permutation[move.Index1];
123                int E2S = permutation[move.Index2];
124                int E2T = permutation.GetCircular(move.Index2 + 1);
125                InversionMoveRelativeAttribute relAttrib = (attrib as InversionMoveRelativeAttribute);
126                if (relAttrib != null) {
127                  if (relAttrib.Edge1Source == E1S && relAttrib.Edge1Target == E2S
128                    || relAttrib.Edge1Source == E1T && relAttrib.Edge1Target == E2T
129                    // if previously deleted Edge2Source-Target is readded
130                    || relAttrib.Edge2Source == E1T && relAttrib.Edge2Target == E2T
131                    || relAttrib.Edge2Source == E1S && relAttrib.Edge2Target == E2S) {
132                    isTabu = true;
133                  }
134                }
135              }
136              break;
137            case PermutationTypes.Absolute: {
138                int i1 = move.Index1;
139                int n1 = permutation[move.Index1];
140                int i2 = move.Index2;
141                int n2 = permutation[move.Index2];
142                InversionMoveAbsoluteAttribute absAttrib = (attrib as InversionMoveAbsoluteAttribute);
143                if (absAttrib != null) {
144                  if ((absAttrib.Index1 == i1 || absAttrib.Index1 == i2) && (absAttrib.Number1 == n1 || absAttrib.Number1 == n2)
145                    || (absAttrib.Index2 == i2 || absAttrib.Index2 == i1) && (absAttrib.Number2 == n2 || absAttrib.Number2 == n1))
146                    isTabu = true;
147
148                }
149              }
150              break;
151            default: {
152                throw new InvalidOperationException(Name + ": Unknown permutation type.");
153              }
154          }
155        }
156        if (isTabu) break;
157      }
158      MoveTabuParameter.ActualValue = new BoolValue(isTabu);
159      return base.Apply();
160    }
161  }
162}
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