org.jqurantree.arabic
Class ArabicText

java.lang.Object
  org.jqurantree.arabic.ArabicText

All Implemented Interfaces:

java.lang.Iterable<ArabicCharacter>

Direct Known Subclasses:

Token, Verse

public class ArabicText
extends java.lang.Object
implements java.lang.Iterable<ArabicCharacter>

ArabicText is an immutable sequence of ArabicCharacters. This class is analogous to the Java String class, where a String is an immutable sequence of 2-byte Unicode characters. The character data in ArabicText is stored in a byte[] buffer, with a fixed width for each letter, including its diacritics. ArabicCharacter instances are a view on the buffer. They are created on demand and are garbage collected. See ByteFormat for details on the internal byte format used.

Author:

Kais Dukes

Field Summary

protected byte[]	buffer The byte[] buffer holding the character data.
protected int	characterCount The number of characters in the text.
protected int	offset The offset to the first character in the buffer.

Constructor Summary

protected	ArabicText(byte[] buffer, int offset, int characterCount) Used internally to create a new Arabic text instance, when constructing the orthography model.
	ArabicText(java.lang.String text) Creates a new Arabic text instance from Unicode character data.

Method Summary

static ArabicText	fromBuckwalter(java.lang.String text) Converts Buckwalter transliteration into Arabic text.
static ArabicText	fromEncoding(java.lang.String text, EncodingType encodingType) Decodes a string into Arabic text, according to the specified encoding scheme.
static ArabicText	fromUnicode(java.lang.String text) Converts Unicode character data into Arabic text.
ArabicCharacter	getCharacter(int index) Gets the ArabicCharacter at the specified index.
CharacterType	getCharacterType(int index) Gets the type of ArabicCharacter at the specified index.
int	getLength() Gets the number of characters in the text.
int	getLetterCount() Gets the number of Arabic letters, which is the number of ArabicCharacters excluding any Quranic symbols.
ArabicText	getSubstring(int start, int end) Gets a new ArabicText instance that is a substring of this instance.
java.util.Iterator<ArabicCharacter>	iterator() Gets an iterator which may be used to enumerate through each character in the text.
ArabicText	removeDiacritics() Gets a new ArabicText instance that is a copy of this instance excluding any attached diacritics.
ArabicText	removeNonLetters() Gets a new ArabicText instance that is a copy of this instance excluding any Quranic symbols.
java.lang.String	toBuckwalter() Converts the Arabic text to Buckwalter transliteration.
java.lang.String	toSimpleEncoding() Converts the Arabic text to simple encoding.
java.lang.String	toString() Converts the Arabic text to Unicode.
java.lang.String	toString(EncodingType encodingType) Converts the Arabic text to a string according the specified encoding scheme.
java.lang.String	toString(EncodingType encodingType, EncodingOptions options) Converts the Arabic text to a string according the specified encoding scheme and encoding options.
java.lang.String	toUnicode() Converts the Arabic text to Unicode.

Methods inherited from class java.lang.Object

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

Field Detail

buffer

protected final byte[] buffer

The byte[] buffer holding the character data.

offset

protected final int offset

The offset to the first character in the buffer.

characterCount

protected final int characterCount

The number of characters in the text. Each character is represented by 3 bytes in the buffer.

Constructor Detail

ArabicText

protected ArabicText(byte[] buffer,
                     int offset,
                     int characterCount)

Used internally to create a new Arabic text instance, when constructing the orthography model.

Parameters:

buffer - the byte[] buffer holding the character data

offset - the offset of the first character in the buffer

characterCount - the number of characters in the text, each character is represented by 3 bytes in the buffer

ArabicText

public ArabicText(java.lang.String text)

Creates a new Arabic text instance from Unicode character data.

Parameters:

text - a string holding the text, which will be decoded from Unicode character data

See Also:

UnicodeDecoder

Method Detail

fromUnicode

public static ArabicText fromUnicode(java.lang.String text)

Converts Unicode character data into Arabic text.

Parameters:

text - a string holding the text, which will be decoded from Unicode character data

Returns:

a new Arabic text instance

See Also:

UnicodeDecoder

fromBuckwalter

public static ArabicText fromBuckwalter(java.lang.String text)

Converts Buckwalter transliteration into Arabic text.

Parameters:

text - a string holding the text, which will be decoded from Buckwalter transliteration

Returns:

a new Arabic text instance

See Also:

BuckwalterDecoder

fromEncoding

public static ArabicText fromEncoding(java.lang.String text,
                                      EncodingType encodingType)

Decodes a string into Arabic text, according to the specified encoding scheme.

Parameters:

text - the string to decode

encodingType - the encoding scheme to use

Returns:

a new Arabic text instance

toString

public java.lang.String toString()

Converts the Arabic text to Unicode.

Overrides:

toString in class java.lang.Object

Returns:

a string representing the Arabic text as Unicode character data

See Also:

UnicodeEncoder

toString

public java.lang.String toString(EncodingType encodingType)

Converts the Arabic text to a string according the specified encoding scheme.

Parameters:

encodingType - the encoding scheme to use

Returns:

a string representing the Arabic text

toString

public java.lang.String toString(EncodingType encodingType,
                                 EncodingOptions options)

Converts the Arabic text to a string according the specified encoding scheme and encoding options.

Parameters:

encodingType - the encoding scheme to use

options - the encoding options to use when encoding the text

Returns:

a string representing the Arabic text

toUnicode

public java.lang.String toUnicode()

Converts the Arabic text to Unicode.

Returns:

a string representing the Arabic text as Unicode character data

See Also:

UnicodeEncoder

toBuckwalter

public java.lang.String toBuckwalter()

Converts the Arabic text to Buckwalter transliteration.

Returns:

a string representing the Arabic text using Buckwalter transliteration

See Also:

BuckwalterEncoder

toSimpleEncoding

public java.lang.String toSimpleEncoding()

Converts the Arabic text to simple encoding.

Returns:

a string representing the Arabic text using simple encoding

See Also:

SimpleEncoder

getLength

public int getLength()

Gets the number of characters in the text. Each Arabic letter or Quranic symbol, including any attached diacritics, counts as a single character.

Returns:

the number of characters, a positive integer

getCharacter

public ArabicCharacter getCharacter(int index)

Gets the ArabicCharacter at the specified index. The index is zero-based, ranging from 0 to getLength() - 1, inclusive.

Parameters:

index - the zero-based index of the character

Returns:

the ArabicCharacter at the specified index

getCharacterType

public CharacterType getCharacterType(int index)

Gets the type of ArabicCharacter at the specified index. The index is zero-based, ranging from 0 to getLength() - 1, inclusive.

Parameters:

index - the zero-based index of the character

Returns:

the type of Arabic letter or Quranic symbol at the specified index, such as Alif or Ba

iterator

public java.util.Iterator<ArabicCharacter> iterator()

Gets an iterator which may be used to enumerate through each character in the text.

Specified by:

iterator in interface java.lang.Iterable<ArabicCharacter>

Returns:

an ArabicCharacter iterator

getSubstring

public ArabicText getSubstring(int start,
                               int end)

Gets a new ArabicText instance that is a substring of this instance. The substring begins at the specified start index, and ends before the character at the specified end index. The length of the substring will be end - start.

Parameters:

start - the zero-based start index of the substring, inclusive.

end - the zero-based end index of the substring, exclusive.

Returns:

the specified substring as Arabic text

removeDiacritics

public ArabicText removeDiacritics()

Gets a new ArabicText instance that is a copy of this instance excluding any attached diacritics. The number of ArabicCharacters in both strings will be equal. The returned string will not have any attached diacritics, so calls to methods such as ArabicCharacter.isFatha() will return false.

Returns:

a new Arabic text instance without diacritics

getLetterCount

public int getLetterCount()

Gets the number of Arabic letters, which is the number of ArabicCharacters excluding any Quranic symbols. The value returned will always be less or equal to getLength().

Returns:

the number of Arabic letters in the text

removeNonLetters

public ArabicText removeNonLetters()

Gets a new ArabicText instance that is a copy of this instance excluding any Quranic symbols. The returned string will have only Arabic letters, so that getLetterCount() == getLength() .

Returns:

a new Arabic text instance with ony Arabic letters