gov.sandia.cognition.text.term.filter.stem

Class PorterEnglishStemmingFilter

java.lang.Object

gov.sandia.cognition.util.AbstractCloneableSerializable

gov.sandia.cognition.text.term.filter.AbstractSingleTermFilter

gov.sandia.cognition.text.term.filter.stem.PorterEnglishStemmingFilter

All Implemented Interfaces:

SingleTermFilter, TermFilter, CloneableSerializable, java.io.Serializable, java.lang.Cloneable

@PublicationReference(author="Martin Porter",title="The Porter Stemming Algorithm",year=2006,type=WebPage,url="http://tartarus.org/~martin/PorterStemmer/") @PublicationReference(author="Martin F. Porter",title=" An algorithm for suffix stripping",year=1980,publication="Program 14(3)",pages={130,137},type=Journal) @PublicationReference(author="Wikipedia",title="Stemming",year=2010,type=WebPage,url="http://en.wikipedia.org/wiki/Stemming")
public class PorterEnglishStemmingFilter
extends AbstractSingleTermFilter

A term filter that uses the Porter Stemming algorithm. It is a rule-based algorithm for stemming English words. This class just wraps the Java implementation of the stemmer by Martin Porter himself and turns it into a TermFilter.

Since:

3.0

Author:

Justin Basilico

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PorterEnglishStemmingFilter() Creates a new PorterEnglishStemmingFilter.

Method Summary

Modifier and Type	Method and Description
TermOccurrence	filterTerm(TermOccurrence occurrence) Takes a single term occurrence and filters that occurrence into a new occurrence or returns null, indicating that the filter rejects that term.
static java.lang.String	stem(java.lang.String word) Stems the given String according to the Porter stemming algorithm for English words.

Methods inherited from class gov.sandia.cognition.text.term.filter.AbstractSingleTermFilter

filterTerms

Methods inherited from class gov.sandia.cognition.util.AbstractCloneableSerializable

clone

Methods inherited from class java.lang.Object

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

Methods inherited from interface gov.sandia.cognition.util.CloneableSerializable

clone

Constructor Detail

PorterEnglishStemmingFilter

public PorterEnglishStemmingFilter()

Creates a new PorterEnglishStemmingFilter.

Method Detail

filterTerm

public TermOccurrence filterTerm(TermOccurrence occurrence)

Description copied from interface: SingleTermFilter

Takes a single term occurrence and filters that occurrence into a new occurrence or returns null, indicating that the filter rejects that term.

Parameters:

occurrence - The term occurrence to filter.

Returns:

A term occurrence (may be a new instance or the same as the given one) of the term to replace the given one or null to indicate that the filter has rejected the given term.

stem

public static java.lang.String stem(java.lang.String word)

Stems the given String according to the Porter stemming algorithm for English words.

Parameters:

word - The word to stem.

Returns:

The stemmed version of the given word.