Free cookie consent management tool by TermsFeed Policy Generator

source: branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Operators/Shakers/NMoveShakingOperator.cs @ 15504

Last change on this file since 15504 was 15504, checked in by abeham, 6 years ago

#1614: refactored code

  • change problem to derive from basic problem
  • using a combined instance class instead of individual parameters
File size: 3.9 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2017 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, IMultiNeighborhoodShakingOperator, IStochasticOperator {
35
36
37    public ILookupParameter<GQAPInstance> ProblemInstanceParameter {
38      get { return (ILookupParameter<GQAPInstance>)Parameters["ProblemInstance"]; }
39    }
40    public ILookupParameter<IntegerVector> AssignmentParameter {
41      get { return (ILookupParameter<IntegerVector>)Parameters["Assignment"]; }
42    }
43    public IValueLookupParameter<IntValue> CurrentNeighborhoodIndexParameter {
44      get { return (IValueLookupParameter<IntValue>)Parameters["CurrentNeighborhoodIndex"]; }
45    }
46    public ILookupParameter<IntValue> NeighborhoodCountParameter {
47      get { return (ILookupParameter<IntValue>)Parameters["NeighborhoodCount"]; }
48    }
49    public ILookupParameter<IRandom> RandomParameter {
50      get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
51    }
52
53    [StorableConstructor]
54    protected NMoveShakingOperator(bool deserializing) : base(deserializing) { }
55    protected NMoveShakingOperator(NMoveShakingOperator original, Cloner cloner) : base(original, cloner) { }
56    public NMoveShakingOperator() {
57      Parameters.Add(new LookupParameter<GQAPInstance>("ProblemInstance", GQAP.ProblemInstanceDescription));
58      Parameters.Add(new LookupParameter<IntegerVector>("Assignment", GQAPSolutionCreator.AssignmentDescription));
59      Parameters.Add(new ValueLookupParameter<IntValue>("CurrentNeighborhoodIndex", "The index of the operator that should be applied (k)."));
60      Parameters.Add(new LookupParameter<IntValue>("NeighborhoodCount", "The number of operators that are available."));
61      Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator to use."));
62    }
63
64    public override IDeepCloneable Clone(Cloner cloner) {
65      return new NMoveShakingOperator(this, cloner);
66    }
67
68    public override IOperation Apply() {
69      var random = RandomParameter.ActualValue;
70      var assignment = AssignmentParameter.ActualValue;
71      var capacities = ProblemInstanceParameter.ActualValue.Capacities;
72
73      if (NeighborhoodCountParameter.ActualValue == null)
74        NeighborhoodCountParameter.ActualValue = new IntValue(assignment.Length);
75      else NeighborhoodCountParameter.ActualValue.Value = assignment.Length;
76
77      int index = CurrentNeighborhoodIndexParameter.ActualValue.Value;
78
79      var move = StochasticNMoveSingleMoveGenerator.GenerateUpToN(random, assignment, index + 1, capacities);
80      NMoveMaker.Apply(assignment, move);
81
82      return base.Apply();
83    }
84  }
85}
Note: See TracBrowser for help on using the repository browser.