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source: branches/NSGA2/HeuristicLab.Algorithms.NSGA2/3.3/DefaultCrossover.cs @ 4902

Last change on this file since 4902 was 4902, checked in by vdorfer, 12 years ago

#1040:

  • adapted NSGAII to new cloning implementation
File size: 2.3 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.Operators;
24using HeuristicLab.Optimization;
25using HeuristicLab.Parameters;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27using HeuristicLab.Common;
28
29namespace HeuristicLab.Algorithms.NSGA2 {
30  [Item("DefaultCrossover", "This operator creates a parent by copying a single individual.")]
31  [StorableClass]
32  public class DefaultCrossover : SingleSuccessorOperator, ICrossover, IStochasticOperator {
33    public ILookupParameter<IRandom> RandomParameter {
34      get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
35    }
36
37
38    [StorableConstructor]
39    protected DefaultCrossover(bool deserializing) : base(deserializing) { }
40    protected DefaultCrossover(DefaultCrossover original, Cloner cloner) : base(original, cloner) { }
41    public DefaultCrossover()
42      : base() {
43      Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator."));
44    }
45
46    public override IOperation Apply() {
47      IScope scope = ExecutionContext.Scope;
48      int index = RandomParameter.ActualValue.Next(scope.SubScopes.Count);
49      IScope child = scope.SubScopes[index];
50
51      foreach (IVariable var in child.Variables)
52        scope.Variables.Add((IVariable)var.Clone());
53
54      return base.Apply();
55    }
56
57    public override IDeepCloneable Clone(Cloner cloner) {
58      return new DefaultCrossover(this, cloner);
59    }
60  }
61}
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