org.apache.lucene.analysis.ru
Class RussianAnalyzer

java.lang.Object
  extended by org.apache.lucene.analysis.Analyzer
      extended by org.apache.lucene.analysis.ReusableAnalyzerBase
          extended by org.apache.lucene.analysis.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.ReusableAnalyzerBase
ReusableAnalyzerBase.TokenStreamComponents
 
Field Summary
static String DEFAULT_STOPWORD_FILE
          File containing default Russian stopwords.
 
Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
matchVersion, stopwords
 
Constructor Summary
RussianAnalyzer(Version matchVersion)
           
RussianAnalyzer(Version matchVersion, Map<?,?> stopwords)
          Deprecated. use RussianAnalyzer(Version, Set) instead
RussianAnalyzer(Version matchVersion, Set<?> stopwords)
          Builds an analyzer with the given stop words
RussianAnalyzer(Version matchVersion, Set<?> stopwords, Set<?> stemExclusionSet)
          Builds an analyzer with the given stop words
RussianAnalyzer(Version matchVersion, String... stopwords)
          Deprecated. use RussianAnalyzer(Version, Set) instead
 
Method Summary
protected  ReusableAnalyzerBase.TokenStreamComponents createComponents(String fieldName, Reader reader)
          Creates ReusableAnalyzerBase.TokenStreamComponents used to tokenize all the text in the provided Reader.
static Set<?> getDefaultStopSet()
          Returns an unmodifiable instance of the default stop-words set.
 
Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet
 
Methods inherited from class org.apache.lucene.analysis.ReusableAnalyzerBase
initReader, reusableTokenStream, tokenStream
 
Methods inherited from class org.apache.lucene.analysis.Analyzer
close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setPreviousTokenStream
 
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

@Deprecated
public RussianAnalyzer(Version matchVersion,
                                  String... stopwords)
Deprecated. use RussianAnalyzer(Version, Set) instead

Builds an analyzer with the given stop words.


RussianAnalyzer

public RussianAnalyzer(Version matchVersion,
                       Set<?> stopwords)
Builds an analyzer with the given stop words

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

RussianAnalyzer

public RussianAnalyzer(Version matchVersion,
                       Set<?> stopwords,
                       Set<?> 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

RussianAnalyzer

@Deprecated
public RussianAnalyzer(Version matchVersion,
                                  Map<?,?> stopwords)
Deprecated. use RussianAnalyzer(Version, Set) instead

Builds an analyzer with the given stop words. TODO: create a Set version of this ctor

Method Detail

getDefaultStopSet

public static Set<?> getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set.

Returns:
an unmodifiable instance of the default stop-words set.

createComponents

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

Specified by:
createComponents in class ReusableAnalyzerBase
Parameters:
fieldName - the name of the fields content passed to the ReusableAnalyzerBase.TokenStreamComponents sink as a reader
reader - the reader passed to the Tokenizer constructor
Returns:
ReusableAnalyzerBase.TokenStreamComponents built from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter , KeywordMarkerFilter if a stem exclusion set is provided, and SnowballFilter


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