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source: trunk/sources/HeuristicLab.Problems.VehicleRouting/3.3/Encodings/Prins/Crossovers/PrinsPermutationCrossover.cs @ 5193

Last change on this file since 5193 was 5193, checked in by swagner, 12 years ago

Merged ParallelEngine branch back into trunk (#1333)

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