| 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.Common;
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| 23 | using HeuristicLab.Core;
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| 24 | using HeuristicLab.Encodings.PermutationEncoding;
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| 25 | using HeuristicLab.Parameters;
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| 26 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 27 |
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| 28 | namespace HeuristicLab.Problems.VehicleRouting.Encodings.Prins {
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| 29 | [Item("PrinsPermutationCrossover", "An operator which crosses two VRP representations using a standard permutation operator. It is implemented as described in Prins, C. (2004). A simple and effective evolutionary algorithm for the vehicle routing problem. Computers & Operations Research, 12:1985-2002.")]
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| 30 | [StorableClass]
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| 31 | public sealed class PrinsPermutationCrossover : PrinsCrossover, IPrinsOperator {
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| 32 | public IValueLookupParameter<IPermutationCrossover> InnerCrossoverParameter {
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| 33 | get { return (IValueLookupParameter<IPermutationCrossover>)Parameters["InnerCrossover"]; }
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| 34 | }
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| 35 |
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| 36 | [StorableConstructor]
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| 37 | private PrinsPermutationCrossover(bool deserializing) : base(deserializing) { }
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| 38 | private PrinsPermutationCrossover(PrinsPermutationCrossover original, Cloner cloner) : base(original, cloner) { }
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| 39 | public override IDeepCloneable Clone(Cloner cloner) {
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| 40 | return new PrinsPermutationCrossover(this, cloner);
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| 41 | }
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| 42 | public PrinsPermutationCrossover()
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| 43 | : base() {
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| 44 | Parameters.Add(new ValueLookupParameter<IPermutationCrossover>("InnerCrossover", "The permutation crossover.", new OrderCrossover()));
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| 45 | }
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| 46 |
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| 47 | protected override PrinsEncoding Crossover(IRandom random, PrinsEncoding parent1, PrinsEncoding parent2) {
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| 48 | //note - the inner crossover is called here and the result is converted to a prins representation
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| 49 | //some refactoring should be done here in the future - the crossover operation should be called directly
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| 50 |
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| 51 | InnerCrossoverParameter.ActualValue.ParentsParameter.ActualName = ParentsParameter.ActualName;
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| 52 | IAtomicOperation op = this.ExecutionContext.CreateOperation(
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| 53 | InnerCrossoverParameter.ActualValue, this.ExecutionContext.Scope);
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| 54 | op.Operator.Execute((IExecutionContext)op, CancellationToken);
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| 55 |
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| 56 | string childName = InnerCrossoverParameter.ActualValue.ChildParameter.ActualName;
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| 57 | if (ExecutionContext.Scope.Variables.ContainsKey(childName)) {
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| 58 | Permutation permutation = ExecutionContext.Scope.Variables[childName].Value as Permutation;
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| 59 | ExecutionContext.Scope.Variables.Remove(childName);
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| 60 |
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| 61 | return new PrinsEncoding(permutation, Cities,
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| 62 | DueTimeParameter.ActualValue,
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| 63 | ServiceTimeParameter.ActualValue,
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| 64 | ReadyTimeParameter.ActualValue,
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| 65 | DemandParameter.ActualValue,
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| 66 | CapacityParameter.ActualValue,
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| 67 | FleetUsageFactor.ActualValue,
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| 68 | TimeFactor.ActualValue,
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| 69 | DistanceFactor.ActualValue,
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| 70 | OverloadPenalty.ActualValue,
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| 71 | TardinessPenalty.ActualValue,
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| 72 | CoordinatesParameter.ActualValue,
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| 73 | UseDistanceMatrixParameter.ActualValue);
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| 74 | } else
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| 75 | return null;
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| 76 | }
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| 77 | }
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| 78 | }
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