Package org.apache.lucene.analysis.ru
Class RussianAnalyzer
- java.lang.Object
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- org.apache.lucene.analysis.Analyzer
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- org.apache.lucene.analysis.StopwordAnalyzerBase
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- org.apache.lucene.analysis.ru.RussianAnalyzer
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- All Implemented Interfaces:
Closeable
,AutoCloseable
public final class RussianAnalyzer extends StopwordAnalyzerBase
Analyzer
for Russian language.Supports an external list of stopwords (words that will not be indexed at all). A default set of stopwords is used unless an alternative list is specified.
- Since:
- 3.1
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
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Field Summary
Fields Modifier and Type Field Description static String
DEFAULT_STOPWORD_FILE
File containing default Russian stopwords.-
Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
stopwords
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Fields inherited from class org.apache.lucene.analysis.Analyzer
GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY
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Constructor Summary
Constructors Constructor Description RussianAnalyzer()
RussianAnalyzer(CharArraySet stopwords)
Builds an analyzer with the given stop wordsRussianAnalyzer(CharArraySet stopwords, CharArraySet stemExclusionSet)
Builds an analyzer with the given stop words
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected Analyzer.TokenStreamComponents
createComponents(String fieldName)
CreatesAnalyzer.TokenStreamComponents
used to tokenize all the text in the providedReader
.static CharArraySet
getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set.protected TokenStream
normalize(String fieldName, TokenStream in)
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Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, loadStopwordSet, loadStopwordSet
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Methods inherited from class org.apache.lucene.analysis.Analyzer
attributeFactory, close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, initReaderForNormalization, normalize, tokenStream, tokenStream
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Field Detail
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DEFAULT_STOPWORD_FILE
public static final String DEFAULT_STOPWORD_FILE
File containing default Russian stopwords.- See Also:
- Constant Field Values
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Constructor Detail
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RussianAnalyzer
public RussianAnalyzer()
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RussianAnalyzer
public RussianAnalyzer(CharArraySet stopwords)
Builds an analyzer with the given stop words- Parameters:
stopwords
- a stopword set
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RussianAnalyzer
public RussianAnalyzer(CharArraySet stopwords, CharArraySet stemExclusionSet)
Builds an analyzer with the given stop words- Parameters:
stopwords
- a stopword setstemExclusionSet
- a set of words not to be stemmed
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Method Detail
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getDefaultStopSet
public static CharArraySet getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set.- Returns:
- an unmodifiable instance of the default stop-words set.
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createComponents
protected Analyzer.TokenStreamComponents createComponents(String fieldName)
CreatesAnalyzer.TokenStreamComponents
used to tokenize all the text in the providedReader
.- Specified by:
createComponents
in classAnalyzer
- Returns:
Analyzer.TokenStreamComponents
built from aStandardTokenizer
filtered withLowerCaseFilter
,StopFilter
,SetKeywordMarkerFilter
if a stem exclusion set is provided, andSnowballFilter
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normalize
protected TokenStream normalize(String fieldName, TokenStream in)
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