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source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Potvin/Manipulators/PotvinOneLevelExchangeManipulator.cs @ 4722

Last change on this file since 4722 was 4722, checked in by swagner, 13 years ago

Merged cloning refactoring branch back into trunk (#922)

File size: 2.8 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.Collections.Generic;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26
27namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
28  [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.")]
29  [StorableClass]
30  public sealed class PotvinOneLevelExchangeMainpulator : PotvinManipulator {
31    [StorableConstructor]
32    private PotvinOneLevelExchangeMainpulator(bool deserializing) : base(deserializing) { }
33    private PotvinOneLevelExchangeMainpulator(PotvinOneLevelExchangeMainpulator original, Cloner cloner)
34      : base(original, cloner) {
35    }
36    public override IDeepCloneable Clone(Cloner cloner) {
37      return new PotvinOneLevelExchangeMainpulator(this, cloner);
38    }
39    public PotvinOneLevelExchangeMainpulator() : base() { }
40
41    protected override void Manipulate(IRandom random, PotvinEncoding individual) {
42      int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
43      Tour route1 =
44        individual.Tours[selectedIndex];
45
46      List<int> replaced = new List<int>();
47      for (int i = 0; i < route1.Cities.Count; i++) {
48        int insertedRoute, insertedPlace;
49
50        if (FindInsertionPlace(individual, route1.Cities[i], selectedIndex, out insertedRoute, out insertedPlace)) {
51          individual.Tours[insertedRoute].Cities.Insert(insertedPlace, route1.Cities[i]);
52          replaced.Add(route1.Cities[i]);
53        }
54      }
55
56      route1.Cities.RemoveAll(
57        new System.Predicate<int>(
58          delegate(int val) {
59            return (replaced.Contains(val));
60          }
61        )
62      );
63
64      if (route1.Cities.Count == 0)
65        individual.Tours.Remove(route1);
66    }
67  }
68}
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