org.apache.lucene.analysis.ar

## Class ArabicNormalizer

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

-     public class ArabicNormalizer
      extends java.lang.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 and Description
    --- | ---
    `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

    Constructors
    Constructor and Description
    `ArabicNormalizer()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected int` | `delete(char[] s, int pos, int len)` Delete a character in-place
    `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

    - #### delete

          protected int delete(char[] s,
                               int pos,
                               int len)

      Delete a character in-place
      Parameters:
        `s` - Input Buffer
        `pos` - Position of character to delete
        `len` - length of input buffer
      Returns:
        length of input buffer after deletion

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