org.apache.lucene.analysis.de
Class GermanStemFilter

java.lang.Object
  |
  +--org.apache.lucene.analysis.TokenStream
        |
        +--org.apache.lucene.analysis.TokenFilter
              |
              +--org.apache.lucene.analysis.de.GermanStemFilter

public final class GermanStemFilter

extends TokenFilter

A filter that stems German words. It supports a table of words that should not be stemmed at all. The stemmer used can be changed at runtime after the filter object is created (as long as it is a GermanStemmer).

Version:

$Id: GermanStemFilter.java,v 1.3 2002/04/19 19:08:32 otis Exp $

Author:

Gerhard Schwarz

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

input

Constructor Summary

GermanStemFilter(TokenStream in)

GermanStemFilter(TokenStream in, Hashtable exclusiontable)
Builds a GermanStemFilter that uses an exclusiontable.

Method Summary

Token	next() Returns the next token in the stream, or null at EOS.
void	setExclusionTable(Hashtable exclusiontable) Set an alternative exclusion list for this filter.
void	setStemmer(GermanStemmer stemmer) Set a alternative/custom GermanStemmer for this filter.

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

close

Methods inherited from class java.lang.Object

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

Constructor Detail

GermanStemFilter

public GermanStemFilter(TokenStream in)

GermanStemFilter

public GermanStemFilter(TokenStream in,
                        Hashtable exclusiontable)

Builds a GermanStemFilter that uses an exclusiontable.

Method Detail

next

public final Token next()
                 throws IOException

Description copied from class: TokenStream

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

Overrides:

next in class TokenStream

Returns:

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

setStemmer

public void setStemmer(GermanStemmer stemmer)

Set a alternative/custom GermanStemmer for this filter.

setExclusionTable

public void setExclusionTable(Hashtable exclusiontable)

Set an alternative exclusion list for this filter.