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source: branches/2520_PersistenceReintegration/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/TreeMatching/SymbolicExpressionTreeEqualityComparer.cs @ 16605

Last change on this file since 16605 was 16559, checked in by jkarder, 6 years ago

#2520: renamed Fossil to Attic and set version to 1.0.0-pre01

File size: 922 bytes
Line 
1using System;
2using System.Collections.Generic;
3using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
4using HEAL.Attic;
5
6namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
7  [StorableType("535830d4-551e-4b53-97e3-9605bd7e785f")]
8  public class SymbolicExpressionTreeEqualityComparer : IEqualityComparer<ISymbolicExpressionTree> {
9    [Storable]
10    public SymbolicExpressionTreeNodeEqualityComparer SimilarityComparer { get; set; }
11
12    public bool Equals(ISymbolicExpressionTree a, ISymbolicExpressionTree b) {
13      if (SimilarityComparer == null) throw new Exception("SimilarityComparer needs to be initialized first.");
14      return a.Length == b.Length && SymbolicExpressionTreeMatching.Match(a.Root, b.Root, SimilarityComparer) == Math.Min(a.Length, b.Length);
15    }
16
17    public int GetHashCode(ISymbolicExpressionTree tree) {
18      return (tree.Length << 8) % 12345;
19    }
20  }
21}
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