1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using HeuristicLab.Core;
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23 | using HeuristicLab.Encodings.PermutationEncoding;
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24 | using HeuristicLab.Parameters;
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25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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26 | using HeuristicLab.Data;
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27 | using System.Collections.Generic;
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28 | using HeuristicLab.Common;
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29 |
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30 | namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
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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.")]
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32 | [StorableClass]
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33 | public sealed class PotvinOneLevelExchangeMainpulator : PotvinManipulator {
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34 | [StorableConstructor]
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35 | private PotvinOneLevelExchangeMainpulator(bool deserializing) : base(deserializing) { }
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36 |
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37 | public PotvinOneLevelExchangeMainpulator() : base() { }
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38 |
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39 | public override IDeepCloneable Clone(Cloner cloner) {
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40 | return new PotvinOneLevelExchangeMainpulator(this, cloner);
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41 | }
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42 |
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43 | private PotvinOneLevelExchangeMainpulator(PotvinOneLevelExchangeMainpulator original, Cloner cloner)
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44 | : base(original, cloner) {
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45 | }
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46 |
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47 | protected override void Manipulate(IRandom random, PotvinEncoding individual) {
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48 | int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
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49 | Tour route1 =
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50 | individual.Tours[selectedIndex];
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51 |
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52 | List<int> replaced = new List<int>();
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53 | for (int i = 0; i < route1.Stops.Count; i++) {
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54 | int insertedRoute, insertedPlace;
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55 |
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56 | if (FindInsertionPlace(individual, route1.Stops[i], selectedIndex, out insertedRoute, out insertedPlace)) {
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57 | individual.Tours[insertedRoute].Stops.Insert(insertedPlace, route1.Stops[i]);
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58 | replaced.Add(route1.Stops[i]);
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59 | }
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60 | }
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61 |
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62 | route1.Stops.RemoveAll(
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63 | new System.Predicate<int>(
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64 | delegate(int val) {
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65 | return (replaced.Contains(val));
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66 | }
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67 | )
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68 | );
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69 |
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70 | if (route1.Stops.Count == 0)
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71 | individual.Tours.Remove(route1);
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72 | }
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73 | }
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74 | }
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