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source: branches/CloningRefactoring/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Prins/Crossovers/PrinsPermutationCrossover.cs @ 4689

Last change on this file since 4689 was 4686, checked in by abeham, 14 years ago

#922

  • Refactored Prins encoding in HeuristicLab.Problems.VehicleRouting
File size: 3.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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 HeuristicLab.Core;
23using HeuristicLab.Encodings.PermutationEncoding;
24using HeuristicLab.Parameters;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26using HeuristicLab.Data;
27using HeuristicLab.Common;
28
29namespace HeuristicLab.Problems.VehicleRouting.Encodings.Prins {
30  [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.")]
31  [StorableClass]
32  public sealed class PrinsPermutationCrossover : PrinsCrossover, IPrinsOperator {   
33    public IValueLookupParameter<IPermutationCrossover> InnerCrossoverParameter {
34      get { return (IValueLookupParameter<IPermutationCrossover>)Parameters["InnerCrossover"]; }
35    }
36
37    [StorableConstructor]
38    private PrinsPermutationCrossover(bool deserializing) : base(deserializing) { }
39    private PrinsPermutationCrossover(PrinsPermutationCrossover original, Cloner cloner) : base(original, cloner) { }
40    public override IDeepCloneable Clone(Cloner cloner) {
41      return new PrinsPermutationCrossover(this, cloner);
42    }
43    public PrinsPermutationCrossover()
44      : base() {
45      Parameters.Add(new ValueLookupParameter<IPermutationCrossover>("InnerCrossover", "The permutation crossover.", new OrderCrossover()));
46    }
47
48    protected override PrinsEncoding Crossover(IRandom random, PrinsEncoding parent1, PrinsEncoding parent2) {
49      //note - the inner crossover is called here and the result is converted to a prins representation
50      //some refactoring should be done here in the future - the crossover operation should be called directly
51
52      InnerCrossoverParameter.ActualValue.ParentsParameter.ActualName = ParentsParameter.ActualName;
53      IAtomicOperation op = this.ExecutionContext.CreateOperation(
54        InnerCrossoverParameter.ActualValue, this.ExecutionContext.Scope);
55      op.Operator.Execute((IExecutionContext)op);
56
57      string childName = InnerCrossoverParameter.ActualValue.ChildParameter.ActualName;
58      if (ExecutionContext.Scope.Variables.ContainsKey(childName)) {
59        Permutation permutation = ExecutionContext.Scope.Variables[childName].Value as Permutation;
60        ExecutionContext.Scope.Variables.Remove(childName);
61
62        return new PrinsEncoding(permutation, Cities,
63          DueTimeParameter.ActualValue,
64            ServiceTimeParameter.ActualValue,
65            ReadyTimeParameter.ActualValue,
66            DemandParameter.ActualValue,
67            CapacityParameter.ActualValue,
68            FleetUsageFactor.ActualValue,
69            TimeFactor.ActualValue,
70            DistanceFactor.ActualValue,
71            OverloadPenalty.ActualValue,
72            TardinessPenalty.ActualValue,
73            CoordinatesParameter.ActualValue,
74            UseDistanceMatrixParameter.ActualValue);
75      } else
76        return null;
77    }
78  }
79}
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