source: branches/TerminationCriteria/HeuristicLab.Termination/3.3/SingleObjectiveQualityTerminator.cs @ 12411

Last change on this file since 12411 was 12411, checked in by pfleck, 4 years ago

#2027

  • Removed MaximumIterationsTerminator and MaximumEvaluatedSolutionsTermimator because they practically do the same.
  • Add the possibility for ThresholdTerminators to use a foreign parameter (e.g. MaximumSelectionPressure). This way the terminator can use parameters which are still relevant for the algorithm and still provide consistent management of the terminators.
  • Renamed IThresholdTerminator to ISingleValueTerminator.
File size: 1.7 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.Core;
23using HeuristicLab.Data;
24using HeuristicLab.Optimization;
25
26namespace HeuristicLab.Termination {
27  [Item("SingleObjectiveQualityTerminator", "")]
28  public class SingleObjectiveQualityTerminator : ComparisonTerminator<DoubleValue> {
29    public SingleObjectiveQualityTerminator() { }
30
31    public void Parameterize(IParameter qualityParameter, ISingleObjectiveHeuristicOptimizationProblem problem) {
32      ComparisonValueParameter.ActualName = qualityParameter.Name;
33      if (problem != null) {
34        var maximizationParameter = (IValueParameter<BoolValue>)problem.MaximizationParameter;
35        if (maximizationParameter != null) {
36          bool maximization = maximizationParameter.Value.Value;
37          Comparison = maximization ? ComparisonType.Less : ComparisonType.Greater;
38          Threshold.Value = maximization ? double.MaxValue : double.MinValue;
39        }
40      }
41    }
42  }
43}
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