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source: stable/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Alba/Moves/IntraRouteInversion/AlbaExhaustiveIntraRouteInversionMoveGenerator.cs @ 14186

Last change on this file since 14186 was 14186, checked in by swagner, 8 years ago

#2526: Updated year of copyrights in license headers

File size: 3.2 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 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.Collections.Generic;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Optimization;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27using HeuristicLab.Problems.VehicleRouting.Interfaces;
28
29namespace HeuristicLab.Problems.VehicleRouting.Encodings.Alba {
30  [Item("AlbaExhaustiveIntraRouteInversionGenerator", "Generates all possible intra route inversion moves from a given VRP encoding.  It is implemented as described in Alba, E. and Dorronsoro, B. (2004). Solving the Vehicle Routing Problem by Using Cellular Genetic Algorithms.")]
31  [StorableClass]
32  public sealed class AlbaExhaustiveIntraRouteInversionGenerator : AlbaIntraRouteInversionMoveGenerator, IExhaustiveMoveGenerator, IAlbaIntraRouteInversionMoveOperator {
33    [StorableConstructor]
34    private AlbaExhaustiveIntraRouteInversionGenerator(bool deserializing) : base(deserializing) { }
35
36    public AlbaExhaustiveIntraRouteInversionGenerator()
37      : base() {
38    }
39
40    public override IDeepCloneable Clone(Cloner cloner) {
41      return new AlbaExhaustiveIntraRouteInversionGenerator(this, cloner);
42    }
43
44    private AlbaExhaustiveIntraRouteInversionGenerator(AlbaExhaustiveIntraRouteInversionGenerator original, Cloner cloner)
45      : base(original, cloner) {
46    }
47
48    protected override AlbaIntraRouteInversionMove[] GenerateMoves(AlbaEncoding individual, IVRPProblemInstance problemInstance) {
49      List<AlbaIntraRouteInversionMove> moves = new List<AlbaIntraRouteInversionMove>();
50
51      int currentTourStart = 0;
52      int currentTourEnd = 0;
53      while (currentTourEnd != individual.Length) {
54        currentTourEnd = currentTourStart;
55        while (individual[currentTourEnd] < problemInstance.Cities.Value &&
56          currentTourEnd < individual.Length) {
57          currentTourEnd++;
58        }
59
60        int tourLength = currentTourEnd - currentTourStart;
61        if (tourLength >= 4) {
62          for (int i = 0; i <= tourLength - 4; i++) {
63            for (int j = i + 2; j <= tourLength - 2; j++) {
64              AlbaIntraRouteInversionMove move = new AlbaIntraRouteInversionMove(
65                currentTourStart + i,
66                currentTourStart + j,
67                individual);
68
69              moves.Add(move);
70            }
71          }
72        }
73
74        currentTourStart = currentTourEnd;
75      }
76
77      return moves.ToArray();
78    }
79  }
80}
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