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source: branches/2435-alglib_3_15/HeuristicLab.Algorithms.ALPS/3.3/ReseedingController.cs @ 17021

Last change on this file since 17021 was 16565, checked in by gkronber, 6 years ago

#2520: merged changes from PersistenceOverhaul branch (r16451:16564) into trunk

File size: 3.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2019 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 HEAL.Attic;
28
29namespace HeuristicLab.Algorithms.ALPS {
30  [Item("ReseedingController", "An operator that controls if reseeding is needed.")]
31  [StorableType("67294ABE-C118-41F0-B736-0576F30F664F")]
32  public sealed class ReseedingController : SingleSuccessorOperator {
33    public ILookupParameter<IntValue> GenerationsParameter {
34      get { return (ILookupParameter<IntValue>)Parameters["Generations"]; }
35    }
36    public 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(StorableConstructorFlag _) : base(_) { }
50
51    private ReseedingController(ReseedingController original, Cloner cloner)
52      : base(original, cloner) {
53    }
54    public override IDeepCloneable Clone(Cloner cloner) {
55      return new ReseedingController(this, cloner);
56    }
57
58    public ReseedingController()
59      : base() {
60      Parameters.Add(new LookupParameter<IntValue>("Generations", "The current number of generations."));
61      Parameters.Add(new ValueLookupParameter<IntValue>("AgeGap", "The frequency of reseeding the lowest layer and scaling factor for the age-limits for the layers."));
62      Parameters.Add(new OperatorParameter("FirstLayerOperator", "The operator that is performed on the first layer if reseeding is required."));
63    }
64
65    public override IOperation Apply() {
66      int generations = GenerationsParameter.ActualValue.Value;
67      int ageGap = AgeGapParameter.ActualValue.Value;
68
69      var next = new OperationCollection(base.Apply());
70      if (generations % ageGap == 0) {
71        var layerZeroScope = ExecutionContext.Scope.SubScopes[0];
72        if (FirstLayerOperator != null)
73          next.Insert(0, ExecutionContext.CreateChildOperation(FirstLayerOperator, layerZeroScope));
74      }
75      return next;
76    }
77  }
78}
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