ptstemmer
Class Stemmer

java.lang.Object
  ptstemmer.Stemmer

Direct Known Subclasses:

OrengoStemmer, PorterStemmer, SavoyStemmer

public abstract class Stemmer
extends java.lang.Object

Abstract class that provides the main features to all the stemmers

Author:

Pedro Oliveira

Nested Class Summary

static class

Stemmer.StemmerType

Constructor Summary

Stemmer()

Method Summary

void	clearIgnoreList() Clear the contents of the ignore list
void	disableCaching() Disable and delete the LRU Cache
void	enableCaching(int size) Create a LRU Cache, caching the last size stems
java.lang.String[]	getPhraseStems(java.lang.String phrase) Performs stemming on the phrase, using a simple space tokenizer
java.lang.String	getWordStem(java.lang.String word) Performs stemming on the word
void	ignore(java.util.Collection<java.lang.String> words) Add Collection of words to ignore list
void	ignore(java.lang.String... words) Add list of words to ignore list
boolean	isCachingEnabled() Check if LRU Cache is enabled
static Stemmer	StemmerFactory(Stemmer.StemmerType stype) Stemmer construction factory

Methods inherited from class java.lang.Object

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

Constructor Detail

Stemmer

public Stemmer()

Method Detail

StemmerFactory

public static Stemmer StemmerFactory(Stemmer.StemmerType stype)
                              throws PTStemmerException

Stemmer construction factory

Parameters:

stype -

Returns:

Throws:

PTStemmerException

enableCaching

public void enableCaching(int size)

Create a LRU Cache, caching the last size stems

Parameters:

size -

disableCaching

public void disableCaching()

Disable and delete the LRU Cache

isCachingEnabled

public boolean isCachingEnabled()

Check if LRU Cache is enabled

Returns:

ignore

public void ignore(java.lang.String... words)

Add list of words to ignore list

Parameters:

words -

ignore

public void ignore(java.util.Collection<java.lang.String> words)

Add Collection of words to ignore list

Parameters:

words -

clearIgnoreList

public void clearIgnoreList()

Clear the contents of the ignore list

getPhraseStems

public java.lang.String[] getPhraseStems(java.lang.String phrase)

Performs stemming on the phrase, using a simple space tokenizer

Parameters:

phrase -

Returns:

getWordStem

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

Performs stemming on the word

Parameters:

word -

Returns: