edu.iastate.jtm
Class PorterStemmer

java.lang.Object
  edu.iastate.jtm.PorterStemmer

All Implemented Interfaces:

Stemmer

public class PorterStemmer
extends java.lang.Object
implements Stemmer

PorterStemmer, implementing the Porter Stemming Algorithm The Stemmer class transforms a word into its root form. The input word can be provided a character at time (by calling add()), or at once by calling one of the various stem(something) methods.

Field Summary

Fields inherited from interface edu.iastate.jtm.Stemmer

ALLCAP, allCapPattern, ANYWORD, anyWordPattern, delimiters, FIRSTCAP, firstCapPattern, NOCAP, noCapPattern

Constructor Summary

PorterStemmer()
Creates a new instance of PorterStemmer

Method Summary

static void	main(java.lang.String[] args) Test program for demonstrating the Stemmer.
java.lang.String	stemSentence(java.lang.String sen) Stem a sentence.
java.lang.String	stemWord(java.lang.String word) Stem a lower-cased word.
java.lang.String	stemWord(java.lang.String word, int type) Stem a word.
java.lang.String	toString() After a word has been stemmed, it can be retrieved by toString(), or a reference to the internal buffer can be retrieved by getResultBuffer and getResultLength (which is generally more efficient.)

Methods inherited from class java.lang.Object

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

Constructor Detail

PorterStemmer

public PorterStemmer()

Creates a new instance of PorterStemmer

Method Detail

toString

public java.lang.String toString()

After a word has been stemmed, it can be retrieved by toString(), or a reference to the internal buffer can be retrieved by getResultBuffer and getResultLength (which is generally more efficient.)

Overrides:

toString in class java.lang.Object

Returns:

String representation of the buffer

stemWord

public java.lang.String stemWord(java.lang.String word,
                                 int type)

Stem a word.

Specified by:

stemWord in interface Stemmer

Parameters:

word - the word to be stemmed

type - capitalization type of the word

Returns:

stemmed word

stemWord

public java.lang.String stemWord(java.lang.String word)

Stem a lower-cased word.

Specified by:

stemWord in interface Stemmer

Parameters:

word - the word to be stemmed

Returns:

stemmed word

stemSentence

public java.lang.String stemSentence(java.lang.String sen)

Stem a sentence.

Specified by:

stemSentence in interface Stemmer

Parameters:

sen - the sentence to be stemmed

Returns:

stemmed sentence

main

public static void main(java.lang.String[] args)

Test program for demonstrating the Stemmer.

Parameters:

args - sentences/words to be tested