org.apache.lucene.analysis.en

Class KStemFilter

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.TokenFilter

org.apache.lucene.analysis.en.KStemFilter

All Implemented Interfaces:

Closeable

public final class KStemFilter
extends TokenFilter

A high-performance kstem filter for english.

See "Viewing Morphology as an Inference Process" (Krovetz, R., Proceedings of the Sixteenth Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, 191-203, 1993).

All terms must already be lowercased for this filter to work correctly.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

AttributeSource.AttributeFactory, AttributeSource.State

Field Summary

Fields inherited from class org.apache.lucene.analysis.TokenFilter

input

Constructor Summary

Constructors

Constructor and Description
KStemFilter(TokenStream in)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	incrementToken() Returns the next, stemmed, input Token.

Methods inherited from class org.apache.lucene.analysis.TokenFilter

close, end, reset

Methods inherited from class org.apache.lucene.util.AttributeSource

addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState

Methods inherited from class java.lang.Object

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

Constructor Detail

KStemFilter

public KStemFilter(TokenStream in)

Method Detail

incrementToken

public boolean incrementToken()
                       throws IOException

Returns the next, stemmed, input Token.

Specified by:

incrementToken in class TokenStream

Returns:

The stemmed form of a token.

Throws:

IOException - If there is a low-level I/O error.