source: branches/2839_HiveProjectManagement/HeuristicLab.Encodings.PermutationEncoding/3.3/PermutationCrossover.cs @ 16057

Last change on this file since 16057 was 16057, checked in by jkarder, 15 months ago

#2839:

File size: 3.0 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 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.Operators;
25using HeuristicLab.Optimization;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Encodings.PermutationEncoding {
30  /// <summary>
31  /// A base class for permutation crossover operators.
32  /// </summary>
33  [Item("PermutationCrossover", "A base class for permutation crossover operators.")]
34  [StorableClass]
35  public abstract class PermutationCrossover : InstrumentedOperator, IPermutationCrossover, IStochasticOperator {
36    public override bool CanChangeName {
37      get { return false; }
38    }
39
40    public ILookupParameter<IRandom> RandomParameter {
41      get { return (LookupParameter<IRandom>)Parameters["Random"]; }
42    }
43    public ILookupParameter<ItemArray<Permutation>> ParentsParameter {
44      get { return (ScopeTreeLookupParameter<Permutation>)Parameters["Parents"]; }
45    }
46    public ILookupParameter<Permutation> ChildParameter {
47      get { return (ILookupParameter<Permutation>)Parameters["Child"]; }
48    }
49
50    [StorableConstructor]
51    protected PermutationCrossover(bool deserializing) : base(deserializing) { }
52    protected PermutationCrossover(PermutationCrossover original, Cloner cloner) : base(original, cloner) { }
53    protected PermutationCrossover()
54      : base() {
55      Parameters.Add(new LookupParameter<IRandom>("Random", "The pseudo random number generator which should be used for stochastic crossover operators."));
56      Parameters.Add(new ScopeTreeLookupParameter<Permutation>("Parents", "The parent permutations which should be crossed."));
57      ParentsParameter.ActualName = "Permutation";
58      Parameters.Add(new LookupParameter<Permutation>("Child", "The child permutation resulting from the crossover."));
59      ChildParameter.ActualName = "Permutation";
60    }
61
62    public sealed override IOperation InstrumentedApply() {
63      ChildParameter.ActualValue = Cross(RandomParameter.ActualValue, ParentsParameter.ActualValue);
64      return base.InstrumentedApply();
65    }
66
67    protected abstract Permutation Cross(IRandom random, ItemArray<Permutation> parents);
68  }
69}
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