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source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Alba/Moves/LambdaInterchange/ExhaustiveLambdaInterchangeMoveGenerator.cs @ 4287

Last change on this file since 4287 was 4287, checked in by svonolfe, 12 years ago

Made intra route inversion and lamda interchange moves work with the SA algorithm (#1039)

File size: 2.9 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;
29
30namespace HeuristicLab.Problems.VehicleRouting.Encodings.Alba {
31  [Item("ExhaustiveLambdaInterchangeMoveGenerator", "Generates all possible lambda interchange moves from a given VRP encoding.")]
32  [StorableClass]
33  public sealed class ExhaustiveLambdaInterchangeMoveGenerator : LambdaInterchangeMoveGenerator, IExhaustiveMoveGenerator, IAlbaLambdaInterchangeMoveOperator {
34    [StorableConstructor]
35    private ExhaustiveLambdaInterchangeMoveGenerator(bool deserializing) : base(deserializing) { }
36
37    public ExhaustiveLambdaInterchangeMoveGenerator()
38      : base() {
39    }
40
41    protected override LambdaInterchangeMove[] GenerateMoves(AlbaEncoding individual, int lambda) {
42      List<LambdaInterchangeMove> moves = new List<LambdaInterchangeMove>();
43
44      List<Tour> tours = individual.GetTours();
45
46      for (int tour1Index = 0; tour1Index < tours.Count; tour1Index++) {
47        Tour tour1 = tours[tour1Index];
48        for (int tour2Index = tour1Index + 1; tour2Index < tours.Count; tour2Index++) {
49          Tour tour2 = tours[tour2Index];
50
51          for (int length1 = 0; length1 <= Math.Min(lambda, tour1.Cities.Count); length1++) {
52            for(int length2 = 0; length2 <= Math.Min(lambda, tour2.Cities.Count); length2++) {
53              if(length1 != 0 || length2 != 0) {
54                for(int index1 = 0; index1 < tour1.Cities.Count - length1 + 1; index1++) {
55                  for(int index2 = 0; index2 < tour2.Cities.Count - length2 + 1; index2++) {
56                    moves.Add(new LambdaInterchangeMove(tour1Index, index1, length1,
57                      tour2Index, index2, length2, individual));
58                  }
59                }
60              }
61            }
62          }
63        }
64      }
65
66      return moves.ToArray();
67    }
68  }
69}
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