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source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Alba/Moves/IntraRouteInversion/AlbaExhaustiveIntraRouteInversionMoveGenerator.cs @ 4752

Last change on this file since 4752 was 4752, checked in by svonolfe, 14 years ago

Merged relevant changes from the trunk into the branch (cloning,...) (#1177)

File size: 3.3 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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.Core;
24using HeuristicLab.Optimization;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26using HeuristicLab.Problems.VehicleRouting.Encodings.Alba;
27using HeuristicLab.Parameters;
28using System.Collections.Generic;
29using HeuristicLab.Problems.VehicleRouting.Interfaces;
30using HeuristicLab.Common;
31
32namespace HeuristicLab.Problems.VehicleRouting.Encodings.Alba {
33  [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.")]
34  [StorableClass]
35  public sealed class AlbaExhaustiveIntraRouteInversionGenerator : AlbaIntraRouteInversionMoveGenerator, IExhaustiveMoveGenerator, IAlbaIntraRouteInversionMoveOperator {
36    [StorableConstructor]
37    private AlbaExhaustiveIntraRouteInversionGenerator(bool deserializing) : base(deserializing) { }
38
39    public AlbaExhaustiveIntraRouteInversionGenerator()
40      : base() {
41    }
42
43    public override IDeepCloneable Clone(Cloner cloner) {
44      return new AlbaExhaustiveIntraRouteInversionGenerator(this, cloner);
45    }
46
47    private AlbaExhaustiveIntraRouteInversionGenerator(AlbaExhaustiveIntraRouteInversionGenerator original, Cloner cloner)
48      : base(original, cloner) {
49    }
50
51    protected override AlbaIntraRouteInversionMove[] GenerateMoves(AlbaEncoding individual, IVRPProblemInstance problemInstance) {
52      List<AlbaIntraRouteInversionMove> moves = new List<AlbaIntraRouteInversionMove>();
53
54      int currentTourStart = 0;
55      int currentTourEnd = 0;
56      while(currentTourEnd != individual.Length) {
57        currentTourEnd = currentTourStart;
58        while (individual[currentTourEnd] < problemInstance.Cities.Value &&
59          currentTourEnd < individual.Length) {
60          currentTourEnd++;
61        }
62
63        int tourLength = currentTourEnd - currentTourStart;
64        if (tourLength >= 4) {
65          for (int i = 0; i <= tourLength - 4; i++ ) {
66            for (int j = i + 2; j <= tourLength - 2; j++) {
67              AlbaIntraRouteInversionMove move = new AlbaIntraRouteInversionMove(
68                currentTourStart + i,
69                currentTourStart + j,
70                individual);
71
72              moves.Add(move);
73            }
74          }
75        }
76
77        currentTourStart = currentTourEnd;
78      }
79
80      return moves.ToArray();
81    }
82  }
83}
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