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source: branches/HeuristicLab.EvolutionTracking/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Tracking/SymbolicDataAnalysisExpressionAfterCrossoverOperator.cs @ 12156

Last change on this file since 12156 was 11694, checked in by bburlacu, 10 years ago

#1772: Fixed cloning in tracking operators for symbolic data analysis. Added unit tests (in progress).

File size: 2.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2014 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;
23using System.Collections.Generic;
24using System.Linq;
25using HeuristicLab.Common;
26using HeuristicLab.Core;
27using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
28using HeuristicLab.EvolutionTracking;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
32  public class SymbolicDataAnalysisExpressionAfterCrossoverOperator : AfterCrossoverOperator<ISymbolicExpressionTree> {
33    public SymbolicDataAnalysisExpressionAfterCrossoverOperator() { }
34
35    protected SymbolicDataAnalysisExpressionAfterCrossoverOperator(SymbolicDataAnalysisExpressionAfterCrossoverOperator original, Cloner cloner)
36      : base(original, cloner) {
37    }
38
39    public override IDeepCloneable Clone(Cloner cloner) {
40      return new SymbolicDataAnalysisExpressionAfterCrossoverOperator(this, cloner);
41    }
42
43    [StorableConstructor]
44    protected SymbolicDataAnalysisExpressionAfterCrossoverOperator(bool deserializing) : base(deserializing) { }
45
46    public override IOperation Apply() {
47      var childVertex = GenealogyGraph.GetByContent(ChildParameter.ActualValue);
48      var arcs = childVertex.InArcs.ToList();
49      var nodes0 = (List<ISymbolicExpressionTreeNode>)arcs[0].Data;
50      var nodes1 = (List<ISymbolicExpressionTreeNode>)arcs[1].Data;
51      var childNodes = childVertex.Data.IterateNodesPrefix().ToList();
52      IFragment<ISymbolicExpressionTreeNode> fragment = null;
53      for (int i = 0; i < Math.Min(nodes0.Count, childNodes.Count); ++i) {
54        if (nodes0[i] == childNodes[i]) continue;
55        fragment = new Fragment<ISymbolicExpressionTreeNode> {
56          Root = childNodes[i],
57          Index1 = i,
58        };
59        fragment.Index2 = nodes1.IndexOf(fragment.Root);
60        break;
61      }
62
63      // if the fragment is null it means that nodes0 is identical with childNodes (in other words crossover did nothing)
64      arcs[0].Data = null;
65      arcs[1].Data = fragment;
66
67      return base.Apply();
68    }
69  }
70}
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