Package org.apache.lucene.analysis.ru

Class RussianAnalyzer

java.lang.Object

org.apache.lucene.analysis.Analyzer

org.apache.lucene.analysis.util.StopwordAnalyzerBase

org.apache.lucene.analysis.ru.RussianAnalyzer

All Implemented Interfaces:

java.io.Closeable, java.lang.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.

You must specify the required Version compatibility when creating RussianAnalyzer:

• As of 3.1, StandardTokenizer is used, Snowball stemming is done with SnowballFilter, and Snowball stopwords are used by default.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer

Analyzer.GlobalReuseStrategy, Analyzer.PerFieldReuseStrategy, Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	DEFAULT_STOPWORD_FILE	File containing default Russian stopwords.

Fields inherited from class org.apache.lucene.analysis.Analyzer

GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY

Constructor Summary

Constructors

Constructor	Description
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

Modifier and Type	Method	Description
static CharArraySet	getDefaultStopSet()	Returns an unmodifiable instance of the default stop-words set.

Methods inherited from class org.apache.lucene.analysis.util.StopwordAnalyzerBase

getStopwordSet

Methods inherited from class org.apache.lucene.analysis.Analyzer

close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, tokenStream, tokenStream

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_STOPWORD_FILE

public static final java.lang.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.