edu.udo.cs.wvtool.generic.stemmer
Class SnowballStemmerWrapper

java.lang.Object
  edu.udo.cs.wvtool.generic.stemmer.AbstractStemmer
      edu.udo.cs.wvtool.generic.stemmer.SnowballStemmerWrapper

All Implemented Interfaces:

SimpleStemmer, WVTStemmer, TokenEnumeration

public class SnowballStemmerWrapper
extends AbstractStemmer

Wrapper for the snowball stemmer package.

Version:

$Id: SnowballStemmerWrapper.java,v 1.2 2006/06/06 11:45:23 mjwurst Exp $

Author:

Michael Wurst

Field Summary

private static java.lang.String	DEFAULT_LANGUAGE
private net.sf.snowball.SnowballProgram	stemmer the stemmer itself
private java.lang.reflect.Method	stemMethod

Constructor Summary

SnowballStemmerWrapper()
Constructor for SnowballStemmerWrapper.

Method Summary

java.lang.String	getBase(java.lang.String s) Produce the base form of a given term.
private void	setLanguage(java.lang.String language)
TokenEnumeration	stem(TokenEnumeration source, WVTDocumentInfo d) Convert a list of tokens to a list of stems.

Methods inherited from class edu.udo.cs.wvtool.generic.stemmer.AbstractStemmer

hasMoreTokens, nextToken

Methods inherited from class java.lang.Object

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

Field Detail

stemmer

private net.sf.snowball.SnowballProgram stemmer

the stemmer itself

stemMethod

private java.lang.reflect.Method stemMethod

DEFAULT_LANGUAGE

private static final java.lang.String DEFAULT_LANGUAGE

See Also:

Constant Field Values

Constructor Detail

SnowballStemmerWrapper

public SnowballStemmerWrapper()
                       throws WVToolException

Constructor for SnowballStemmerWrapper.

Throws:

WVToolException

Method Detail

stem

public TokenEnumeration stem(TokenEnumeration source,
                             WVTDocumentInfo d)
                      throws WVToolException

Description copied from interface: WVTStemmer

Convert a list of tokens to a list of stems.

Specified by:

stem in interface WVTStemmer

Overrides:

stem in class AbstractStemmer

Parameters:

source - the original stream of tokens

d - the WVTDocumentInfo value that describes the document being processed

Returns:

the resulting stream of tokens

Throws:

WVToolException

setLanguage

private void setLanguage(java.lang.String language)
                  throws WVToolException

Throws:

WVToolException

getBase

public java.lang.String getBase(java.lang.String s)

Description copied from interface: SimpleStemmer

Produce the base form of a given term.

Specified by:

getBase in interface SimpleStemmer

Specified by:

getBase in class AbstractStemmer

Parameters:

s - a term

Returns:

the base form of the term