[4174] | 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 |
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| 29 | namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
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[4177] | 30 | [Item("Potvin1MMainpulator", "The one-level exchange operator which manipulates a Potvin 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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[4174] | 31 | [StorableClass]
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| 32 | public sealed class Potvin1MMainpulator : PotvinManipulator {
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| 33 | protected override void Manipulate(IRandom random, PotvinEncoding individual) {
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| 34 | int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
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| 35 | Tour route1 =
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| 36 | individual.Tours[selectedIndex];
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| 37 |
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| 38 | List<int> replaced = new List<int>();
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| 39 | for (int i = 0; i < route1.Cities.Count; i++) {
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| 40 | int insertedRoute, insertedPlace;
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| 41 |
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| 42 | if (FindInsertionPlace(individual, route1.Cities[i], selectedIndex, out insertedRoute, out insertedPlace)) {
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| 43 | individual.Tours[insertedRoute].Cities.Insert(insertedPlace, route1.Cities[i]);
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| 44 | replaced.Add(route1.Cities[i]);
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| 45 | }
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| 46 | }
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| 47 |
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| 48 | route1.Cities.RemoveAll(
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| 49 | new System.Predicate<int>(
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| 50 | delegate(int val) {
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| 51 | return (replaced.Contains(val));
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| 52 | }
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| 53 | )
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| 54 | );
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| 55 |
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| 56 | if (route1.Cities.Count == 0)
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| 57 | individual.Tours.Remove(route1);
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| 58 | }
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| 59 | }
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| 60 | }
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