Package org.apache.lucene.analysis.ru
Class RussianAnalyzer
java.lang.Object
org.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.StopwordAnalyzerBase
org.apache.lucene.analysis.ru.RussianAnalyzer
- All Implemented Interfaces:
Closeable
,AutoCloseable
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
Nested ClassesNested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final String
File containing default Russian stopwords.private final CharArraySet
Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
stopwords
Fields inherited from class org.apache.lucene.analysis.Analyzer
GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY
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Constructor Summary
ConstructorsConstructorDescriptionRussianAnalyzer
(CharArraySet stopwords) Builds an analyzer with the given stop wordsRussianAnalyzer
(CharArraySet stopwords, CharArraySet stemExclusionSet) Builds an analyzer with the given stop words -
Method Summary
Modifier and TypeMethodDescriptionprotected Analyzer.TokenStreamComponents
createComponents
(String fieldName) CreatesAnalyzer.TokenStreamComponents
used to tokenize all the text in the providedReader
.static CharArraySet
Returns an unmodifiable instance of the default stop-words set.protected TokenStream
normalize
(String fieldName, TokenStream in) Wrap the givenTokenStream
in order to apply normalization filters.Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, loadStopwordSet
Methods inherited from class org.apache.lucene.analysis.Analyzer
attributeFactory, close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, initReaderForNormalization, normalize, tokenStream, tokenStream
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Field Details
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DEFAULT_STOPWORD_FILE
File containing default Russian stopwords.- See Also:
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stemExclusionSet
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Constructor Details
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RussianAnalyzer
public RussianAnalyzer() -
RussianAnalyzer
Builds an analyzer with the given stop words- Parameters:
stopwords
- a stopword set
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RussianAnalyzer
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 Details
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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
CreatesAnalyzer.TokenStreamComponents
used to tokenize all the text in the providedReader
.- Specified by:
createComponents
in classAnalyzer
- Parameters:
fieldName
- the name of the fields content passed to theAnalyzer.TokenStreamComponents
sink as a reader- Returns:
Analyzer.TokenStreamComponents
built from aStandardTokenizer
filtered withLowerCaseFilter
,StopFilter
,SetKeywordMarkerFilter
if a stem exclusion set is provided, andSnowballFilter
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normalize
Description copied from class:Analyzer
Wrap the givenTokenStream
in order to apply normalization filters. The default implementation returns theTokenStream
as-is. This is used byAnalyzer.normalize(String, String)
.
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