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source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Alba/Moves/IntraRouteInversion/AlbaExhaustiveIntraRouteInversionMoveGenerator.cs @ 9596

Last change on this file since 9596 was 9456, checked in by swagner, 12 years ago

Updated copyright year and added some missing license headers (#1889)

File size: 3.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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;
27
28namespace HeuristicLab.Problems.VehicleRouting.Encodings.Alba {
29  [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.")]
30  [StorableClass]
31  public sealed class AlbaExhaustiveIntraRouteInversionGenerator : AlbaIntraRouteInversionMoveGenerator, IExhaustiveMoveGenerator, IAlbaIntraRouteInversionMoveOperator {
32    [StorableConstructor]
33    private AlbaExhaustiveIntraRouteInversionGenerator(bool deserializing) : base(deserializing) { }
34    private AlbaExhaustiveIntraRouteInversionGenerator(AlbaExhaustiveIntraRouteInversionGenerator original, Cloner cloner) : base(original, cloner) { }
35    public AlbaExhaustiveIntraRouteInversionGenerator()
36      : base() {
37    }
38
39    public override IDeepCloneable Clone(Cloner cloner) {
40      return new AlbaExhaustiveIntraRouteInversionGenerator(this, cloner);
41    }
42
43    protected override AlbaIntraRouteInversionMove[] GenerateMoves(AlbaEncoding individual) {
44      List<AlbaIntraRouteInversionMove> moves = new List<AlbaIntraRouteInversionMove>();
45
46      int currentTourStart = 0;
47      int currentTourEnd = 0;
48      while (currentTourEnd != individual.Length) {
49        currentTourEnd = currentTourStart;
50        while (individual[currentTourEnd] < individual.Cities &&
51          currentTourEnd < individual.Length) {
52          currentTourEnd++;
53        }
54
55        int tourLength = currentTourEnd - currentTourStart;
56        if (tourLength >= 4) {
57          for (int i = 0; i <= tourLength - 4; i++) {
58            for (int j = i + 2; j <= tourLength - 2; j++) {
59              AlbaIntraRouteInversionMove move = new AlbaIntraRouteInversionMove(
60                currentTourStart + i,
61                currentTourStart + j,
62                individual);
63
64              moves.Add(move);
65            }
66          }
67        }
68
69        currentTourStart = currentTourEnd;
70      }
71
72      return moves.ToArray();
73    }
74  }
75}
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