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source: stable/HeuristicLab.Optimization.Operators/3.3/ParentCopyCrossover.cs @ 15589

Last change on this file since 15589 was 15584, checked in by swagner, 6 years ago

#2640: Updated year of copyrights in license headers on stable

File size: 2.4 KB
Line 
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.Parameters;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Optimization.Operators {
29  [Item("ParentCopyCrossover", "This operator creates an offspring by creating a clone of a randomly chosen parent. It can be used in situations where no crossover should occur after selection.")]
30  [StorableClass]
31  public class ParentCopyCrossover : InstrumentedOperator, ICrossover, IStochasticOperator {
32    public ILookupParameter<IRandom> RandomParameter {
33      get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
34    }
35
36
37    [StorableConstructor]
38    protected ParentCopyCrossover(bool deserializing) : base(deserializing) { }
39    protected ParentCopyCrossover(ParentCopyCrossover original, Cloner cloner) : base(original, cloner) { }
40    public ParentCopyCrossover()
41      : base() {
42      Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator."));
43    }
44
45    public override IOperation InstrumentedApply() {
46      IScope scope = ExecutionContext.Scope;
47      int index = RandomParameter.ActualValue.Next(scope.SubScopes.Count);
48      IScope child = scope.SubScopes[index];
49
50      foreach (IVariable var in child.Variables)
51        scope.Variables.Add((IVariable)var.Clone());
52
53      return base.InstrumentedApply();
54    }
55
56    public override IDeepCloneable Clone(Cloner cloner) {
57      return new ParentCopyCrossover(this, cloner);
58    }
59  }
60}
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