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source: branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Potvin/Manipulators/PotvinOneLevelExchangeManipulator.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: 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 HeuristicLab.Core;
23using HeuristicLab.Encodings.PermutationEncoding;
24using HeuristicLab.Parameters;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26using HeuristicLab.Data;
27using System.Collections.Generic;
28using HeuristicLab.Common;
29
30namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
31  [Item("PotvinOneLevelExchangeMainpulator", "The 1M operator which manipulates a VRP representation.  It is implemented as described in Potvin, J.-Y. and Bengio, S. (1996). The Vehicle Routing Problem with Time Windows - Part II: Genetic Search. INFORMS Journal of Computing, 8:165–172.")]
32  [StorableClass]
33  public sealed class PotvinOneLevelExchangeMainpulator : PotvinManipulator {
34    [StorableConstructor]
35    private PotvinOneLevelExchangeMainpulator(bool deserializing) : base(deserializing) { }
36
37    public PotvinOneLevelExchangeMainpulator() : base() { }
38
39    public override IDeepCloneable Clone(Cloner cloner) {
40      return new PotvinOneLevelExchangeMainpulator(this, cloner);
41    }
42
43    private PotvinOneLevelExchangeMainpulator(PotvinOneLevelExchangeMainpulator original, Cloner cloner)
44      : base(original, cloner) {
45    }
46   
47    protected override void Manipulate(IRandom random, PotvinEncoding individual) {
48      int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
49      Tour route1 =
50        individual.Tours[selectedIndex];
51
52      List<int> replaced = new List<int>();
53      for (int i = 0; i < route1.Stops.Count; i++) {
54        int insertedRoute, insertedPlace;
55
56        if (FindInsertionPlace(individual, route1.Stops[i], selectedIndex, out insertedRoute, out insertedPlace)) {
57          individual.Tours[insertedRoute].Stops.Insert(insertedPlace, route1.Stops[i]);
58          replaced.Add(route1.Stops[i]);
59        }
60      }
61
62      route1.Stops.RemoveAll(
63        new System.Predicate<int>(
64          delegate(int val) {
65            return (replaced.Contains(val));
66          }
67        )
68      );
69
70      if (route1.Stops.Count == 0)
71        individual.Tours.Remove(route1);
72    }
73  }
74}
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