source: branches/2936_GQAPIntegration/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Operators/Shakers/NMoveShakingOperator.cs @ 16077

Last change on this file since 16077 was 16077, checked in by abeham, 12 months ago

#2936: Added integration branch

File size: 4.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Encodings.IntegerVectorEncoding;
26using HeuristicLab.Operators;
27using HeuristicLab.Optimization;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment.Operators {
32  [Item("NMoveShakingOperator", "Performs a number of shaking operations that increase in strength.")]
33  [StorableClass]
34  public class NMoveShakingOperator : SingleSuccessorOperator, IProblemInstanceAwareGQAPOperator,
35    IAssignmentAwareGQAPOperator, IMultiNeighborhoodShakingOperator, IStochasticOperator {
36
37
38    public ILookupParameter<GQAPInstance> ProblemInstanceParameter {
39      get { return (ILookupParameter<GQAPInstance>)Parameters["ProblemInstance"]; }
40    }
41    public ILookupParameter<IntegerVector> AssignmentParameter {
42      get { return (ILookupParameter<IntegerVector>)Parameters["Assignment"]; }
43    }
44    public IValueLookupParameter<IntValue> CurrentNeighborhoodIndexParameter {
45      get { return (IValueLookupParameter<IntValue>)Parameters["CurrentNeighborhoodIndex"]; }
46    }
47    public ILookupParameter<IntValue> NeighborhoodCountParameter {
48      get { return (ILookupParameter<IntValue>)Parameters["NeighborhoodCount"]; }
49    }
50    public ILookupParameter<IRandom> RandomParameter {
51      get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
52    }
53
54    [StorableConstructor]
55    protected NMoveShakingOperator(bool deserializing) : base(deserializing) { }
56    protected NMoveShakingOperator(NMoveShakingOperator original, Cloner cloner) : base(original, cloner) { }
57    public NMoveShakingOperator() {
58      Parameters.Add(new LookupParameter<GQAPInstance>("ProblemInstance", GQAP.ProblemInstanceDescription));
59      Parameters.Add(new LookupParameter<IntegerVector>("Assignment", GQAPSolutionCreator.AssignmentDescription));
60      Parameters.Add(new ValueLookupParameter<IntValue>("CurrentNeighborhoodIndex", "The index of the operator that should be applied (k)."));
61      Parameters.Add(new LookupParameter<IntValue>("NeighborhoodCount", "The number of operators that are available."));
62      Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator to use."));
63    }
64
65    public override IDeepCloneable Clone(Cloner cloner) {
66      return new NMoveShakingOperator(this, cloner);
67    }
68
69    public override IOperation Apply() {
70      var random = RandomParameter.ActualValue;
71      var assignment = AssignmentParameter.ActualValue;
72      var capacities = ProblemInstanceParameter.ActualValue.Capacities;
73
74      if (NeighborhoodCountParameter.ActualValue == null)
75        NeighborhoodCountParameter.ActualValue = new IntValue(assignment.Length);
76      else NeighborhoodCountParameter.ActualValue.Value = assignment.Length;
77
78      int index = CurrentNeighborhoodIndexParameter.ActualValue.Value;
79
80      var move = StochasticNMoveSingleMoveGenerator.GenerateUpToN(random, assignment, index + 1, capacities);
81      NMoveMaker.Apply(assignment, move);
82
83      return base.Apply();
84    }
85  }
86}
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