org.apache.lucene.analysis.ar
Class ArabicNormalizer

java.lang.Object
  org.apache.lucene.analysis.ar.ArabicNormalizer

public class ArabicNormalizer
extends Object

Normalizer for Arabic.

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

Normalization is defined as:

• Normalization of hamza with alef seat to a bare alef.
• Normalization of teh marbuta to heh
• Normalization of dotless yeh (alef maksura) to yeh.
• Removal of Arabic diacritics (the harakat)
• Removal of tatweel (stretching character).

Field Summary

static char	ALEF
static char	ALEF_HAMZA_ABOVE
static char	ALEF_HAMZA_BELOW
static char	ALEF_MADDA
static char	DAMMA
static char	DAMMATAN
static char	DOTLESS_YEH
static char	FATHA
static char	FATHATAN
static char	HEH
static char	KASRA
static char	KASRATAN
static char	SHADDA
static char	SUKUN
static char	TATWEEL
static char	TEH_MARBUTA
static char	YEH

Constructor Summary

ArabicNormalizer()

Method Summary

int	normalize(char[] s, int len) Normalize an input buffer of Arabic text

Methods inherited from class java.lang.Object

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

Field Detail

ALEF

public static final char ALEF

See Also:

Constant Field Values

ALEF_MADDA

public static final char ALEF_MADDA

See Also:

Constant Field Values

ALEF_HAMZA_ABOVE

public static final char ALEF_HAMZA_ABOVE

See Also:

Constant Field Values

ALEF_HAMZA_BELOW

public static final char ALEF_HAMZA_BELOW

See Also:

Constant Field Values

YEH

public static final char YEH

See Also:

Constant Field Values

DOTLESS_YEH

public static final char DOTLESS_YEH

See Also:

Constant Field Values

TEH_MARBUTA

public static final char TEH_MARBUTA

See Also:

Constant Field Values

HEH

public static final char HEH

See Also:

Constant Field Values

TATWEEL

public static final char TATWEEL

See Also:

Constant Field Values

FATHATAN

public static final char FATHATAN

See Also:

Constant Field Values

DAMMATAN

public static final char DAMMATAN

See Also:

Constant Field Values

KASRATAN

public static final char KASRATAN

See Also:

Constant Field Values

FATHA

public static final char FATHA

See Also:

Constant Field Values

DAMMA

public static final char DAMMA

See Also:

Constant Field Values

KASRA

public static final char KASRA

See Also:

Constant Field Values

SHADDA

public static final char SHADDA

See Also:

Constant Field Values

SUKUN

public static final char SUKUN

See Also:

Constant Field Values

Constructor Detail

ArabicNormalizer

public ArabicNormalizer()

Method Detail

normalize

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

Normalize an input buffer of Arabic text

Parameters:

s - input buffer

len - length of input buffer

Returns:

length of input buffer after normalization