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source: trunk/sources/HeuristicLab.Problems.ArtificialAnt/3.3/BestSymbolicExpressionTreeVisualizer.cs @ 3251

Last change on this file since 3251 was 3245, checked in by gkronber, 14 years ago

Added another visualizer that displays the symbolic expression tree of the best artificial ant solution. #952 (Artificial Ant Problem for 3.3)

File size: 3.5 KB
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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 System.Linq;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Operators;
26using HeuristicLab.Optimization;
27using HeuristicLab.Parameters;
28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
29using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
30
31namespace HeuristicLab.Problems.ArtificialAnt {
32  /// <summary>
33  /// An operator for visualizing the best symbolic expression tree of an artificial ant problem.
34  /// </summary>
35  [Item("BestSymbolicExpressionTreeVisualizer", "An operator for visualizing the best symbolic expression tree of an artificial ant problem.")]
36  [StorableClass]
37  public sealed class BestSymbolicExpressionTreeVisualizer : SingleSuccessorOperator, ISingleObjectiveSolutionsVisualizer, ISolutionsVisualizer {
38    public ILookupParameter<ItemArray<SymbolicExpressionTree>> SymbolicExpressionTreeParameter {
39      get { return (ILookupParameter<ItemArray<SymbolicExpressionTree>>)Parameters["SymbolicExpressionTree"]; }
40    }
41    public ILookupParameter<ItemArray<DoubleValue>> QualityParameter {
42      get { return (ILookupParameter<ItemArray<DoubleValue>>)Parameters["Quality"]; }
43    }
44    public ILookupParameter<SymbolicExpressionTree> BestSymbolicExpressionTreeParameter {
45      get { return (ILookupParameter<SymbolicExpressionTree>)Parameters["BestSymbolicExpressionTree"]; }
46    }
47    ILookupParameter ISolutionsVisualizer.VisualizationParameter {
48      get { return BestSymbolicExpressionTreeParameter; }
49    }
50
51    public BestSymbolicExpressionTreeVisualizer()
52      : base() {
53      Parameters.Add(new SubScopesLookupParameter<SymbolicExpressionTree>("SymbolicExpressionTree", "The artificial ant solutions from which the best solution should be visualized."));
54      Parameters.Add(new SubScopesLookupParameter<DoubleValue>("Quality", "The qualities of the artificial ant solutions which should be visualized."));
55      Parameters.Add(new LookupParameter<SymbolicExpressionTree>("BestSymbolicExpressionTree", "The best symbolic expression tree of the artificial ant problem."));
56    }
57
58    public override IOperation Apply() {
59      ItemArray<SymbolicExpressionTree> expressions = SymbolicExpressionTreeParameter.ActualValue;
60      ItemArray<DoubleValue> qualities = QualityParameter.ActualValue;
61
62      int i = qualities.Select((x, index) => new { index, x.Value }).OrderBy(x => -x.Value).First().index;
63
64      SymbolicExpressionTree bestTree = BestSymbolicExpressionTreeParameter.ActualValue;
65      if (bestTree == null) BestSymbolicExpressionTreeParameter.ActualValue = (SymbolicExpressionTree)expressions[i].Clone();
66      else {
67        bestTree.Root = expressions[i].Root;
68      }
69      return base.Apply();
70    }
71  }
72}
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