source: branches/ALPS/HeuristicLab.Algorithms.ALPS/3.3/ReseedingController.cs @ 13111

Last change on this file since 13111 was 13111, checked in by pfleck, 7 years ago

#2269

  • Instead of hidden execution scope change logic in LayerReseeder, the new ReseedingController makes the scope change more obvious by using an OperatorParameter.
  • Instead of the classes for EldersEmigrator, LayerOpener and LayerReseeder the operator graph is created in the AlpsGeneticAlgorithmMainLoop using CombinedOperator.
File size: 2.9 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 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.Data;
25using HeuristicLab.Operators;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Algorithms.ALPS {
30  [Item("ReseedingController", "An operator that controls if reseeding is needed.")]
31  [StorableClass]
32  public sealed class ReseedingController : SingleSuccessorOperator {
33    private ILookupParameter<IntValue> GenerationsParameter {
34      get { return (ILookupParameter<IntValue>)Parameters["Generations"]; }
35    }
36    private ILookupParameter<IntValue> AgeGapParameter {
37      get { return (ILookupParameter<IntValue>)Parameters["AgeGap"]; }
38    }
39    public OperatorParameter FirstLayerOperatorParameter {
40      get { return (OperatorParameter)Parameters["FirstLayerOperator"]; }
41    }
42
43    public IOperator FirstLayerOperator {
44      get { return FirstLayerOperatorParameter.Value; }
45      set { FirstLayerOperatorParameter.Value = value; }
46    }
47
48    [StorableConstructor]
49    private ReseedingController(bool deserializing)
50      : base(deserializing) { }
51
52    private ReseedingController(ReseedingController original, Cloner cloner)
53      : base(original, cloner) {
54    }
55    public override IDeepCloneable Clone(Cloner cloner) {
56      return new ReseedingController(this, cloner);
57    }
58
59    public ReseedingController()
60      : base() {
61      Parameters.Add(new LookupParameter<IntValue>("Generations"));
62      Parameters.Add(new LookupParameter<IntValue>("AgeGap"));
63      Parameters.Add(new OperatorParameter("FirstLayerOperator"));
64    }
65
66    public override IOperation Apply() {
67      int generations = GenerationsParameter.ActualValue.Value;
68      int ageGap = AgeGapParameter.ActualValue.Value;
69
70      var next = new OperationCollection(base.Apply());
71      if (generations % ageGap == 0) {
72        var layerZeroScope = ExecutionContext.Scope.SubScopes[0];
73        if (FirstLayerOperator != null)
74          next.Insert(0, ExecutionContext.CreateChildOperation(FirstLayerOperator, layerZeroScope));
75      }
76      return next;
77    }
78  }
79}
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