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 150998 2004-08-16 20:30:46Z dnaber $

Author:

Gerhard Schwarz

Field Summary

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

input

Constructor Summary

Constructors

Constructor and Description
GermanStemFilter(TokenStream in)
GermanStemFilter(TokenStream in, Hashtable exclusiontable) Deprecated. Use GermanStemFilter(org.apache.lucene.analysis.TokenStream, java.util.Set) instead.
GermanStemFilter(TokenStream in, Set exclusionSet) Builds a GermanStemFilter that uses an exclusiontable.

Method Summary

Methods

Modifier and Type	Method and Description
Token	next() Returns the next token in the stream, or null at EOS.
void	setExclusionSet(Set exclusionSet) Set an alternative exclusion list for this filter.
void	setExclusionTable(Hashtable exclusiontable) Deprecated. Use setExclusionSet(java.util.Set) instead.
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)

Deprecated. Use GermanStemFilter(org.apache.lucene.analysis.TokenStream, java.util.Set) instead.

Builds a GermanStemFilter that uses an exclusiontable.

GermanStemFilter

public GermanStemFilter(TokenStream in,
                Set exclusionSet)

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.

Specified by:

next in class TokenStream

Returns:

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

Throws:

IOException

setStemmer

public void setStemmer(GermanStemmer stemmer)

Set a alternative/custom GermanStemmer for this filter.

setExclusionTable

public void setExclusionTable(Hashtable exclusiontable)

Deprecated. Use setExclusionSet(java.util.Set) instead.

Set an alternative exclusion list for this filter.

setExclusionSet

public void setExclusionSet(Set exclusionSet)

Set an alternative exclusion list for this filter.