Free cookie consent management tool by TermsFeed Policy Generator

source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Potvin/Manipulators/PotvinOneLevelExchangeManipulator.cs @ 6449

Last change on this file since 6449 was 6449, checked in by svonolfe, 13 years ago

Improved performance of many VRP operators by optimizing the parameter lookup (#1561)

File size: 3.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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;
26using HeuristicLab.Data;
27
28namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
29  [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.")]
30  [StorableClass]
31  public sealed class PotvinOneLevelExchangeMainpulator : PotvinManipulator {
32    [StorableConstructor]
33    private PotvinOneLevelExchangeMainpulator(bool deserializing) : base(deserializing) { }
34    private PotvinOneLevelExchangeMainpulator(PotvinOneLevelExchangeMainpulator original, Cloner cloner)
35      : base(original, cloner) {
36    }
37    public override IDeepCloneable Clone(Cloner cloner) {
38      return new PotvinOneLevelExchangeMainpulator(this, cloner);
39    }
40    public PotvinOneLevelExchangeMainpulator() : base() { }
41
42    public static void Apply(IRandom random, PotvinEncoding individual,
43     DoubleArray dueTime, DoubleArray readyTime, DoubleArray serviceTime, DoubleArray demand,
44      DoubleValue capacity, DistanceMatrix distMatrix) {
45      int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
46      Tour route1 =
47        individual.Tours[selectedIndex];
48
49      List<int> replaced = new List<int>();
50      for (int i = 0; i < route1.Cities.Count; i++) {
51        int insertedRoute, insertedPlace;
52
53        if (FindInsertionPlace(individual, route1.Cities[i], selectedIndex,
54          dueTime, serviceTime, readyTime, demand, capacity,
55          distMatrix,
56          out insertedRoute, out insertedPlace)) {
57          individual.Tours[insertedRoute].Cities.Insert(insertedPlace, route1.Cities[i]);
58          replaced.Add(route1.Cities[i]);
59        }
60      }
61
62      route1.Cities.RemoveAll(
63        new System.Predicate<int>(
64          delegate(int val) {
65            return (replaced.Contains(val));
66          }
67        )
68      );
69
70      if (route1.Cities.Count == 0)
71        individual.Tours.Remove(route1);
72    }
73
74    protected override void Manipulate(IRandom random, PotvinEncoding individual) {
75      BoolValue useDistanceMatrix = UseDistanceMatrixParameter.ActualValue;
76      DoubleMatrix coordinates = CoordinatesParameter.ActualValue;
77      DistanceMatrix distMatrix = VRPUtilities.GetDistanceMatrix(coordinates, DistanceMatrixParameter, useDistanceMatrix);
78      DoubleArray dueTime = DueTimeParameter.ActualValue;
79      DoubleArray readyTime = ReadyTimeParameter.ActualValue;
80      DoubleArray serviceTime = ServiceTimeParameter.ActualValue;
81      DoubleArray demand = DemandParameter.ActualValue;
82      DoubleValue capacity = CapacityParameter.ActualValue;
83
84      Apply(random, individual, dueTime, readyTime, serviceTime, demand, capacity, distMatrix);
85    }
86  }
87}
Note: See TracBrowser for help on using the repository browser.