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package org.crosswire.jsword.index.lucene.analysis; |
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import java.io.IOException; |
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import java.io.Reader; |
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import org.apache.lucene.analysis.LowerCaseTokenizer; |
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import org.apache.lucene.analysis.PorterStemFilter; |
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import org.apache.lucene.analysis.StopAnalyzer; |
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import org.apache.lucene.analysis.StopFilter; |
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import org.apache.lucene.analysis.TokenStream; |
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import org.apache.lucene.util.Version; |
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public class EnglishLuceneAnalyzer extends AbstractBookAnalyzer { |
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43 | 0 | public EnglishLuceneAnalyzer() { |
44 | 0 | stopSet = StopAnalyzer.ENGLISH_STOP_WORDS_SET; |
45 | 0 | } |
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@Override |
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public final TokenStream tokenStream(String fieldName, Reader reader) { |
53 | 0 | TokenStream result = new LowerCaseTokenizer(reader); |
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55 | 0 | if (doStopWords && stopSet != null) { |
56 | 0 | result = new StopFilter(StopFilter.getEnablePositionIncrementsVersionDefault(matchVersion), result, stopSet); |
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} |
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60 | 0 | if (doStemming) { |
61 | 0 | result = new PorterStemFilter(result); |
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} |
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64 | 0 | return result; |
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} |
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@Override |
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public TokenStream reusableTokenStream(String fieldName, Reader reader) throws IOException { |
72 | 0 | SavedStreams streams = (SavedStreams) getPreviousTokenStream(); |
73 | 0 | if (streams == null) { |
74 | 0 | streams = new SavedStreams(new LowerCaseTokenizer(reader)); |
75 | 0 | if (doStopWords && stopSet != null) { |
76 | 0 | streams.setResult(new StopFilter(StopFilter.getEnablePositionIncrementsVersionDefault(matchVersion), streams.getResult(), stopSet)); |
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} |
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79 | 0 | if (doStemming) { |
80 | 0 | streams.setResult(new PorterStemFilter(streams.getResult())); |
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} |
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83 | 0 | setPreviousTokenStream(streams); |
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} else { |
85 | 0 | streams.getSource().reset(reader); |
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} |
87 | 0 | return streams.getResult(); |
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} |
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90 | 0 | private final Version matchVersion = Version.LUCENE_29; |
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} |