Lucene.Net  3.0.3
Lucene.Net is a .NET port of the Java Lucene Indexing Library
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PorterStemFilter.cs
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17 
18 using Lucene.Net.Analysis.Tokenattributes;
19 
20 namespace Lucene.Net.Analysis
21 {
22 
41  public sealed class PorterStemFilter:TokenFilter
42  {
43  private readonly PorterStemmer stemmer;
44  private readonly ITermAttribute termAtt;
45 
46  public PorterStemFilter(TokenStream in_Renamed):base(in_Renamed)
47  {
48  stemmer = new PorterStemmer();
49  termAtt = AddAttribute<ITermAttribute>();
50  }
51 
52  public override bool IncrementToken()
53  {
54  if (!input.IncrementToken())
55  return false;
56 
57  if (stemmer.Stem(termAtt.TermBuffer(), 0, termAtt.TermLength()))
58  termAtt.SetTermBuffer(stemmer.ResultBuffer, 0, stemmer.ResultLength);
59  return true;
60  }
61  }
62 }