Package 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

Fields

Modifier and Type	Field	Description
static final char	ALEF
static final char	ALEF_HAMZA_ABOVE
static final char	ALEF_HAMZA_BELOW
static final char	ALEF_MADDA
static final char	DAMMA
static final char	DAMMATAN
static final char	DOTLESS_YEH
static final char	FATHA
static final char	FATHATAN
static final char	HEH
static final char	KASRA
static final char	KASRATAN
static final char	SHADDA
static final char	SUKUN
static final char	TATWEEL
static final char	TEH_MARBUTA
static final char	YEH

Constructor Summary

Constructors

Constructor	Description
ArabicNormalizer()

Method Summary

Modifier and Type	Method	Description
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 Details

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 Details

ArabicNormalizer

public ArabicNormalizer()

Method Details

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