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source: trunk/sources/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/TreeMatching/SymbolicExpressionTreeEqualityComparer.cs @ 13402

Last change on this file since 13402 was 11910, checked in by bburlacu, 10 years ago

#2215:

  • Unified the similarity and matching/equality classes under the same folder.
  • Renamed SymbolicExpressionTreeNodeSimilarityComparer to SymbolicExpressionTreeNodeEqualityComparer, renamed other classes to more descriptive names.
  • Removed unused classes (SymbolicDataAnalysisInternalDiversityAnalyzer.cs, SymbolicExpressionTreeMaxCommonSequenceCalculator.cs
  • Renamed tests and test files.
File size: 829 bytes
Line 
1using System;
2using System.Collections.Generic;
3using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
4
5namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
6  public class SymbolicExpressionTreeEqualityComparer : IEqualityComparer<ISymbolicExpressionTree> {
7    public SymbolicExpressionTreeNodeEqualityComparer SimilarityComparer { get; set; }
8
9    public bool Equals(ISymbolicExpressionTree a, ISymbolicExpressionTree b) {
10      if (SimilarityComparer == null) throw new Exception("SimilarityComparer needs to be initialized first.");
11      return a.Length == b.Length && SymbolicExpressionTreeMatching.Match(a.Root, b.Root, SimilarityComparer) == Math.Min(a.Length, b.Length);
12    }
13
14    public int GetHashCode(ISymbolicExpressionTree tree) {
15      return (tree.Length << 8) % 12345;
16    }
17  }
18}
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