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source: branches/OaaS/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Zhu/Crossovers/ZhuPermutationCrossover.cs @ 15762

Last change on this file since 15762 was 7259, checked in by swagner, 13 years ago

Updated year of copyrights to 2012 (#1716)

File size: 3.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 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.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Encodings.PermutationEncoding;
25using HeuristicLab.Parameters;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Problems.VehicleRouting.Encodings.Zhu {
29  [Item("ZhuPermutationCrossover", "An operator which crosses two VRP representations using a standard permutation operator. It is implemented as described in Zhu, K.Q. (2000). A New Genetic Algorithm For VRPTW. Proceedings of the International Conference on Artificial Intelligence.")]
30  [StorableClass]
31  public sealed class PrinsPermutationCrossover : ZhuCrossover {
32    public IValueLookupParameter<IPermutationCrossover> InnerCrossoverParameter {
33      get { return (IValueLookupParameter<IPermutationCrossover>)Parameters["InnerCrossover"]; }
34    }
35
36    [StorableConstructor]
37    private PrinsPermutationCrossover(bool deserializing) : base(deserializing) { }
38    private PrinsPermutationCrossover(PrinsPermutationCrossover original, Cloner cloner)
39      : base(original, cloner) {
40    }
41    public override IDeepCloneable Clone(Cloner cloner) {
42      return new PrinsPermutationCrossover(this, cloner);
43    }
44    public PrinsPermutationCrossover()
45      : base() {
46      Parameters.Add(new ValueLookupParameter<IPermutationCrossover>("InnerCrossover", "The permutation crossover.", new PartiallyMatchedCrossover()));
47    }
48
49    protected override ZhuEncoding Crossover(IRandom random, ZhuEncoding parent1, ZhuEncoding parent2) {
50      //note - the inner crossover is called here and the solution is converted to a prins representation
51      //some refactoring should be done here in the future - the crossover operation should be called directly
52
53      if (parent1.Length == parent2.Length) {
54        InnerCrossoverParameter.ActualValue.ParentsParameter.ActualName = ParentsParameter.ActualName;
55        IAtomicOperation op = this.ExecutionContext.CreateOperation(
56          InnerCrossoverParameter.ActualValue, this.ExecutionContext.Scope);
57        op.Operator.Execute((IExecutionContext)op, CancellationToken);
58
59        string childName = InnerCrossoverParameter.ActualValue.ChildParameter.ActualName;
60        if (ExecutionContext.Scope.Variables.ContainsKey(childName)) {
61          Permutation permutation = ExecutionContext.Scope.Variables[childName].Value as Permutation;
62          ExecutionContext.Scope.Variables.Remove(childName);
63
64          return new ZhuEncoding(permutation, Cities,
65            DueTimeParameter.ActualValue,
66              ServiceTimeParameter.ActualValue,
67              ReadyTimeParameter.ActualValue,
68              DemandParameter.ActualValue,
69              CapacityParameter.ActualValue,
70              CoordinatesParameter.ActualValue,
71              UseDistanceMatrixParameter.ActualValue);
72        } else
73          return null;
74      } else {
75        return parent1.Clone() as ZhuEncoding;
76      }
77    }
78  }
79}
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