org.apache.lucene.analysis.ru

Class RussianStemFilter

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.TokenFilter

org.apache.lucene.analysis.ru.RussianStemFilter

public final class RussianStemFilter
extends org.apache.lucene.analysis.TokenFilter

A TokenFilter that stems Russian words.

The implementation was inspired by GermanStemFilter. The input should be filtered by RussianLowerCaseFilter before passing it to RussianStemFilter , because RussianStemFilter only works with lowercase part of any "russian" charset.

Version:

$Id: RussianStemFilter.java 808427 2009-08-27 14:28:22Z hossman $

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State

Field Summary

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

input

Constructor Summary

Constructors

Constructor and Description
RussianStemFilter(org.apache.lucene.analysis.TokenStream in)
RussianStemFilter(org.apache.lucene.analysis.TokenStream in, char[] charset) Deprecated. Use RussianStemFilter(TokenStream) instead.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	incrementToken() Returns the next token in the stream, or null at EOS
void	setStemmer(org.apache.lucene.analysis.ru.RussianStemmer stemmer) Set a alternative/custom RussianStemmer for this filter.

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

close, end, reset

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

getOnlyUseNewAPI, next, next, setOnlyUseNewAPI

Methods inherited from class org.apache.lucene.util.AttributeSource

addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, restoreState, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

RussianStemFilter

public RussianStemFilter(org.apache.lucene.analysis.TokenStream in,
                 char[] charset)

Deprecated. Use RussianStemFilter(TokenStream) instead.

RussianStemFilter

public RussianStemFilter(org.apache.lucene.analysis.TokenStream in)

Method Detail

incrementToken

public final boolean incrementToken()
                             throws IOException

Returns the next token in the stream, or null at EOS

Overrides:

incrementToken in class org.apache.lucene.analysis.TokenStream

Throws:

IOException

setStemmer

public void setStemmer(org.apache.lucene.analysis.ru.RussianStemmer stemmer)

Set a alternative/custom RussianStemmer for this filter.