Module org.apache.lucene.analysis.common

Package org.apache.lucene.analysis.id

Class IndonesianStemmer

java.lang.Object

org.apache.lucene.analysis.id.IndonesianStemmer

public class IndonesianStemmer
extends Object

Stemmer for Indonesian.

Stems Indonesian words with the algorithm presented in: A Study of Stemming Effects on Information Retrieval in Bahasa Indonesia, Fadillah Z Tala. http://www.illc.uva.nl/Publications/ResearchReports/MoL-2003-02.text.pdf

Field Summary

Fields

Modifier and Type	Field	Description
private int	flags
private int	numSyllables
private static final int	REMOVED_BER
private static final int	REMOVED_DI
private static final int	REMOVED_KE
private static final int	REMOVED_MENG
private static final int	REMOVED_PE
private static final int	REMOVED_PENG
private static final int	REMOVED_TER

Constructor Summary

Constructors

Constructor	Description
IndonesianStemmer()

Method Summary

Modifier and Type	Method	Description
private boolean	isVowel(char ch)
private int	removeFirstOrderPrefix(char[] text, int length)
private int	removeParticle(char[] text, int length)
private int	removePossessivePronoun(char[] text, int length)
private int	removeSecondOrderPrefix(char[] text, int length)
private int	removeSuffix(char[] text, int length)
int	stem(char[] text, int length, boolean stemDerivational)	Stem a term (returning its new length).
private int	stemDerivational(char[] text, int length)

Methods inherited from class java.lang.Object

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

Field Details

numSyllables

private int numSyllables

flags

private int flags

REMOVED_KE

private static final int REMOVED_KE

See Also:

• Constant Field Values

REMOVED_PENG

private static final int REMOVED_PENG

See Also:

• Constant Field Values

REMOVED_DI

private static final int REMOVED_DI

See Also:

• Constant Field Values

REMOVED_MENG

private static final int REMOVED_MENG

See Also:

• Constant Field Values

REMOVED_TER

private static final int REMOVED_TER

See Also:

• Constant Field Values

REMOVED_BER

private static final int REMOVED_BER

See Also:

• Constant Field Values

REMOVED_PE

private static final int REMOVED_PE

See Also:

• Constant Field Values

Constructor Details

IndonesianStemmer

public IndonesianStemmer()

Method Details

stem

public int stem(char[] text,
 int length,
 boolean stemDerivational)

Stem a term (returning its new length).

Use stemDerivational to control whether full stemming or only light inflectional stemming is done.

stemDerivational

private int stemDerivational(char[] text,
 int length)

isVowel

private boolean isVowel(char ch)

removeParticle

private int removeParticle(char[] text,
 int length)

removePossessivePronoun

private int removePossessivePronoun(char[] text,
 int length)

removeFirstOrderPrefix

private int removeFirstOrderPrefix(char[] text,
 int length)

removeSecondOrderPrefix

private int removeSecondOrderPrefix(char[] text,
 int length)

removeSuffix

private int removeSuffix(char[] text,
 int length)