org.apache.lucene.analysis.de
Class GermanStemFilter

java.lang.Object
  extended by org.apache.lucene.analysis.TokenStream
      extended by org.apache.lucene.analysis.TokenFilter
          extended by 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 564236 2007-08-09 15:21:19Z gsingers $

Field Summary
 
Fields inherited from class org.apache.lucene.analysis.TokenFilter
input
 
Constructor Summary
GermanStemFilter(TokenStream in)
           
GermanStemFilter(TokenStream in, Set exclusionSet)
          Builds a GermanStemFilter that uses an exclusiontable.
 
Method Summary
 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 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 org.apache.lucene.analysis.TokenStream
next, reset
 
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,
                        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. The returned Token is a "full private copy" (not re-used across calls to next()) but will be slower than calling TokenStream.next(Token) instead..

Overrides:
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.


setExclusionSet

public void setExclusionSet(Set exclusionSet)
Set an alternative exclusion list for this filter.



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