Package org.apache.lucene.analysis.ar

Class ArabicStemmer

java.lang.Object

org.apache.lucene.analysis.ar.ArabicStemmer

public class ArabicStemmer
extends java.lang.Object

Stemmer for Arabic.

Stemming is done in-place for efficiency, operating on a termbuffer.

Stemming is defined as:

• Removal of attached definite article, conjunction, and prepositions.
• Stemming of common suffixes.

Field Summary

Fields

Modifier and Type	Field	Description
static char	ALEF
static char	BEH
static char	FEH
static char	HEH
static char	KAF
static char	LAM
static char	NOON
static char[][]	prefixes
static char[][]	suffixes
static char	TEH
static char	TEH_MARBUTA
static char	WAW
static char	YEH

Constructor Summary

Constructors

Constructor	Description
ArabicStemmer()

Method Summary

Modifier and Type	Method	Description
int	stem(char[] s, int len)	Stem an input buffer of Arabic text.
int	stemPrefix(char[] s, int len)	Stem a prefix off an Arabic word.
int	stemSuffix(char[] s, int len)	Stem suffix(es) off an Arabic word.

Methods inherited from class java.lang.Object

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

Field Detail

ALEF

public static final char ALEF

See Also:

Constant Field Values

BEH

public static final char BEH

See Also:

Constant Field Values

TEH_MARBUTA

public static final char TEH_MARBUTA

See Also:

Constant Field Values

TEH

public static final char TEH

See Also:

Constant Field Values

FEH

public static final char FEH

See Also:

Constant Field Values

KAF

public static final char KAF

See Also:

Constant Field Values

LAM

public static final char LAM

See Also:

Constant Field Values

NOON

public static final char NOON

See Also:

Constant Field Values

HEH

public static final char HEH

See Also:

Constant Field Values

WAW

public static final char WAW

See Also:

Constant Field Values

YEH

public static final char YEH

See Also:

Constant Field Values

prefixes

public static final char[][] prefixes

suffixes

public static final char[][] suffixes

Constructor Detail

ArabicStemmer

public ArabicStemmer()

Method Detail

stem

public int stem(char[] s,
                int len)

Stem an input buffer of Arabic text.

Parameters:

s - input buffer

len - length of input buffer

Returns:

length of input buffer after normalization

stemPrefix

public int stemPrefix(char[] s,
                      int len)

Stem a prefix off an Arabic word.

Parameters:

s - input buffer

len - length of input buffer

Returns:

new length of input buffer after stemming.

stemSuffix

public int stemSuffix(char[] s,
                      int len)

Stem suffix(es) off an Arabic word.

Parameters:

s - input buffer

len - length of input buffer

Returns:

new length of input buffer after stemming