org.apache.lucene.analysis.ru
Class RussianAnalyzer

java.lang.Object
  extended by org.apache.lucene.analysis.Analyzer
      extended by org.apache.lucene.analysis.util.StopwordAnalyzerBase
          extended by org.apache.lucene.analysis.ru.RussianAnalyzer
All Implemented Interfaces:
Closeable

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.

You must specify the required Version compatibility when creating RussianAnalyzer:


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.GlobalReuseStrategy, Analyzer.PerFieldReuseStrategy, Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
 
Field Summary
static String DEFAULT_STOPWORD_FILE
          File containing default Russian stopwords.
 
Fields inherited from class org.apache.lucene.analysis.util.StopwordAnalyzerBase
matchVersion, stopwords
 
Fields inherited from class org.apache.lucene.analysis.Analyzer
GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY
 
Constructor Summary
RussianAnalyzer(Version matchVersion)
           
RussianAnalyzer(Version matchVersion, CharArraySet stopwords)
          Builds an analyzer with the given stop words
RussianAnalyzer(Version matchVersion, CharArraySet stopwords, CharArraySet stemExclusionSet)
          Builds an analyzer with the given stop words
 
Method Summary
protected  Analyzer.TokenStreamComponents createComponents(String fieldName, Reader reader)
          Creates Analyzer.TokenStreamComponents used to tokenize all the text in the provided Reader.
static CharArraySet getDefaultStopSet()
          Returns an unmodifiable instance of the default stop-words set.
 
Methods inherited from class org.apache.lucene.analysis.util.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, loadStopwordSet, loadStopwordSet
 
Methods inherited from class org.apache.lucene.analysis.Analyzer
close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, tokenStream, tokenStream
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

DEFAULT_STOPWORD_FILE

public static final String DEFAULT_STOPWORD_FILE
File containing default Russian stopwords.

See Also:
Constant Field Values
Constructor Detail

RussianAnalyzer

public RussianAnalyzer(Version matchVersion)

RussianAnalyzer

public RussianAnalyzer(Version matchVersion,
                       CharArraySet stopwords)
Builds an analyzer with the given stop words

Parameters:
matchVersion - lucene compatibility version
stopwords - a stopword set

RussianAnalyzer

public RussianAnalyzer(Version matchVersion,
                       CharArraySet stopwords,
                       CharArraySet stemExclusionSet)
Builds an analyzer with the given stop words

Parameters:
matchVersion - lucene compatibility version
stopwords - a stopword set
stemExclusionSet - a set of words not to be stemmed
Method Detail

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.

createComponents

protected Analyzer.TokenStreamComponents createComponents(String fieldName,
                                                          Reader reader)
Creates Analyzer.TokenStreamComponents used to tokenize all the text in the provided Reader.

Specified by:
createComponents in class Analyzer
Returns:
Analyzer.TokenStreamComponents built from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter , SetKeywordMarkerFilter if a stem exclusion set is provided, and SnowballFilter


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