[5127] | 1 | #region License Information
|
---|
| 2 | /* HeuristicLab
|
---|
[12012] | 3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
|
---|
[5127] | 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 |
|
---|
[8053] | 22 | using System.Collections.Generic;
|
---|
| 23 | using HeuristicLab.Common;
|
---|
[5127] | 24 | using HeuristicLab.Core;
|
---|
| 25 | using HeuristicLab.Optimization;
|
---|
[8053] | 26 | using HeuristicLab.Parameters;
|
---|
[5127] | 27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
|
---|
| 28 | using HeuristicLab.Problems.VehicleRouting.Interfaces;
|
---|
| 29 |
|
---|
| 30 | namespace HeuristicLab.Problems.VehicleRouting.Encodings.Potvin {
|
---|
| 31 | [Item("PotvinCustomerRelocationSingleMoveGenerator", "Generates a single customer relocation move from a given VRP encoding.")]
|
---|
| 32 | [StorableClass]
|
---|
| 33 | public sealed class PotvinCustomerRelocationSingleMoveGenerator : PotvinCustomerRelocationMoveGenerator,
|
---|
[5867] | 34 | ISingleMoveGenerator {
|
---|
[5127] | 35 | #region IMultiVRPMoveOperator Members
|
---|
| 36 |
|
---|
| 37 | public override ILookupParameter VRPMoveParameter {
|
---|
| 38 | get { return (ILookupParameter)Parameters["PotvinCustomerRelocationMove"]; }
|
---|
| 39 | }
|
---|
| 40 |
|
---|
| 41 | #endregion
|
---|
[8053] | 42 |
|
---|
[5127] | 43 | public ILookupParameter<IRandom> RandomParameter {
|
---|
| 44 | get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
|
---|
| 45 | }
|
---|
| 46 |
|
---|
| 47 | public override IDeepCloneable Clone(Cloner cloner) {
|
---|
| 48 | return new PotvinCustomerRelocationSingleMoveGenerator(this, cloner);
|
---|
| 49 | }
|
---|
| 50 |
|
---|
| 51 | [StorableConstructor]
|
---|
| 52 | private PotvinCustomerRelocationSingleMoveGenerator(bool deserializing) : base(deserializing) { }
|
---|
| 53 |
|
---|
| 54 | public PotvinCustomerRelocationSingleMoveGenerator()
|
---|
| 55 | : base() {
|
---|
| 56 | Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator."));
|
---|
| 57 | }
|
---|
| 58 |
|
---|
[7906] | 59 | private PotvinCustomerRelocationSingleMoveGenerator(PotvinCustomerRelocationSingleMoveGenerator original, Cloner cloner)
|
---|
[5127] | 60 | : base(original, cloner) {
|
---|
| 61 | }
|
---|
| 62 |
|
---|
| 63 | public static PotvinCustomerRelocationMove Apply(PotvinEncoding individual, IVRPProblemInstance problemInstance, IRandom rand) {
|
---|
| 64 | int city = 1 + rand.Next(individual.Cities);
|
---|
| 65 | Tour oldTour = individual.Tours.Find(t => t.Stops.Contains(city));
|
---|
| 66 | int oldTourIndex = individual.Tours.IndexOf(oldTour);
|
---|
| 67 |
|
---|
| 68 | int max = individual.Tours.Count;
|
---|
| 69 | if (individual.Tours.Count < problemInstance.Vehicles.Value)
|
---|
| 70 | max = max - 1;
|
---|
| 71 |
|
---|
| 72 | int newTourIndex = rand.Next(max);
|
---|
| 73 | if (newTourIndex >= oldTourIndex)
|
---|
| 74 | newTourIndex++;
|
---|
| 75 |
|
---|
| 76 | return new PotvinCustomerRelocationMove(city, oldTourIndex, newTourIndex, individual);
|
---|
| 77 | }
|
---|
| 78 |
|
---|
| 79 | protected override PotvinCustomerRelocationMove[] GenerateMoves(PotvinEncoding individual, IVRPProblemInstance problemInstance) {
|
---|
| 80 | List<PotvinCustomerRelocationMove> result = new List<PotvinCustomerRelocationMove>();
|
---|
| 81 |
|
---|
| 82 | PotvinCustomerRelocationMove move = Apply(individual, ProblemInstance, RandomParameter.ActualValue);
|
---|
| 83 | if (move != null)
|
---|
| 84 | result.Add(move);
|
---|
| 85 |
|
---|
| 86 | return result.ToArray();
|
---|
| 87 | }
|
---|
| 88 | }
|
---|
| 89 | }
|
---|