NumericShaper (Java Platform SE 7 b138)

java.lang.Object
- java.awt.font.NumericShaper

All Implemented Interfaces:: Serializable

public final class NumericShaper
extends Object
implements Serializable

The NumericShaper class is used to convert Latin-1 (European) digits to other Unicode decimal digits. Users of this class will primarily be people who wish to present data using national digit shapes, but find it more convenient to represent the data internally using Latin-1 (European) digits. This does not interpret the deprecated numeric shape selector character (U+206E).

Instances of NumericShaper are typically applied as attributes to text with the NUMERIC_SHAPING attribute of the TextAttribute class. For example, this code snippet causes a TextLayout to shape European digits to Arabic in an Arabic context:

 Map map = new HashMap();
 map.put(TextAttribute.NUMERIC_SHAPING,
     NumericShaper.getContextualShaper(NumericShaper.ARABIC));
 FontRenderContext frc = ...;
 TextLayout layout = new TextLayout(text, map, frc);
 layout.draw(g2d, x, y);

It is also possible to perform numeric shaping explicitly using instances of NumericShaper, as this code snippet demonstrates:

 char[] text = ...;
 // shape all EUROPEAN digits (except zero) to ARABIC digits
 NumericShaper shaper = NumericShaper.getShaper(NumericShaper.ARABIC);
 shaper.shape(text, start, count);

 // shape European digits to ARABIC digits if preceding text is Arabic, or
 // shape European digits to TAMIL digits if preceding text is Tamil, or
 // leave European digits alone if there is no preceding text, or
 // preceding text is neither Arabic nor Tamil
 NumericShaper shaper =
     NumericShaper.getContextualShaper(NumericShaper.ARABIC |
                                         NumericShaper.TAMIL,
                                       NumericShaper.EUROPEAN);
 shaper.shape(text, start, count);

Bit mask- and enum-based Unicode ranges

This class supports two different programming interfaces to represent Unicode ranges for script-specific digits: bit mask-based ones, such as NumericShaper.ARABIC, and enum-based ones, such as NumericShaper.Range.ARABIC. Multiple ranges can be specified by ORing bit mask-based constants, such as:

 NumericShaper.ARABIC | NumericShaper.TAMIL

or creating a Set with the NumericShaper.Range constants, such as:

 EnumSet.of(NumericShaper.Scirpt.ARABIC, NumericShaper.Range.TAMIL)

The enum-based ranges are a super set of the bit mask-based ones.

If the two interfaces are mixed (including serialization), Unicode range values are mapped to their counterparts where such mapping is possible, such as NumericShaper.Range.ARABIC from/to NumericShaper.ARABIC. If any unmappable range values are specified, such as NumericShaper.Range.BALINESE, those ranges are ignored.

Decimal Digits Precedence

A Unicode range may have more than one set of decimal digits. If multiple decimal digits sets are specified for the same Unicode range, one of the sets will take precedence as follows.

Unicode Range	`NumericShaper` Constants	Precedence
Arabic	`NumericShaper.ARABIC` `NumericShaper.EASTERN_ARABIC`	`NumericShaper.EASTERN_ARABIC`
Arabic	`NumericShaper.Range.ARABIC` `NumericShaper.Range.EASTERN_ARABIC`	`NumericShaper.Range.EASTERN_ARABIC`
Tai Tham	`NumericShaper.Range.TAI_THAM_HORA` `NumericShaper.Range.TAI_THAM_THAM`	`NumericShaper.Range.TAI_THAM_THAM`

Since:: 1.4
See Also:: Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class NumericShaper.Range
A NumericShaper.Range represents a Unicode range of a script having its own decimal digits.

Nested Classes
Modifier and Type	Class and Description
`static class`	`NumericShaper.Range` A `NumericShaper.Range` represents a Unicode range of a script having its own decimal digits.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`ALL_RANGES` Identifies all ranges, for full contextual shaping.
`static int`	`ARABIC` Identifies the ARABIC range and decimal base.
`static int`	`BENGALI` Identifies the BENGALI range and decimal base.
`static int`	`DEVANAGARI` Identifies the DEVANAGARI range and decimal base.
`static int`	`EASTERN_ARABIC` Identifies the ARABIC range and ARABIC_EXTENDED decimal base.
`static int`	`ETHIOPIC` Identifies the ETHIOPIC range and decimal base.
`static int`	`EUROPEAN` Identifies the Latin-1 (European) and extended range, and Latin-1 (European) decimal base.
`static int`	`GUJARATI` Identifies the GUJARATI range and decimal base.
`static int`	`GURMUKHI` Identifies the GURMUKHI range and decimal base.
`static int`	`KANNADA` Identifies the KANNADA range and decimal base.
`static int`	`KHMER` Identifies the KHMER range and decimal base.
`static int`	`LAO` Identifies the LAO range and decimal base.
`static int`	`MALAYALAM` Identifies the MALAYALAM range and decimal base.
`static int`	`MONGOLIAN` Identifies the MONGOLIAN range and decimal base.
`static int`	`MYANMAR` Identifies the MYANMAR range and decimal base.
`static int`	`ORIYA` Identifies the ORIYA range and decimal base.
`static int`	`TAMIL` Identifies the TAMIL range and decimal base.
`static int`	`TELUGU` Identifies the TELUGU range and decimal base.
`static int`	`THAI` Identifies the THAI range and decimal base.
`static int`	`TIBETAN` Identifies the TIBETAN range and decimal base.

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object o)` Returns `true` if the specified object is an instance of `NumericShaper` and shapes identically to this one, regardless of the range representations, the bit mask or the enum.
`static NumericShaper`	`getContextualShaper(int ranges)` Returns a contextual shaper for the provided unicode range(s).
`static NumericShaper`	`getContextualShaper(int ranges, int defaultContext)` Returns a contextual shaper for the provided unicode range(s).
`static NumericShaper`	`getContextualShaper(Set<NumericShaper.Range> ranges)` Returns a contextual shaper for the provided Unicode range(s).
`static NumericShaper`	`getContextualShaper(Set<NumericShaper.Range> ranges, NumericShaper.Range defaultContext)` Returns a contextual shaper for the provided Unicode range(s).
`int`	`getRanges()` Returns an `int` that ORs together the values for all the ranges that will be shaped.
`Set<NumericShaper.Range>`	`getRangeSet()` Returns a `Set` representing all the Unicode ranges in this `NumericShaper` that will be shaped.
`static NumericShaper`	`getShaper(int singleRange)` Returns a shaper for the provided unicode range.
`static NumericShaper`	`getShaper(NumericShaper.Range singleRange)` Returns a shaper for the provided Unicode range.
`int`	`hashCode()` Returns a hash code for this shaper.
`boolean`	`isContextual()` Returns a `boolean` indicating whether or not this shaper shapes contextually.
`void`	`shape(char[] text, int start, int count)` Converts the digits in the text that occur between start and start + count.
`void`	`shape(char[] text, int start, int count, int context)` Converts the digits in the text that occur between start and start + count, using the provided context.
`void`	`shape(char[] text, int start, int count, NumericShaper.Range context)` Converts the digits in the text that occur between `start` and `start + count`, using the provided `context`.
`String`	`toString()` Returns a `String` that describes this shaper.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - EUROPEAN
```
public static final int EUROPEAN
```
    Identifies the Latin-1 (European) and extended range, and Latin-1 (European) decimal base.
    
    See Also:
    Constant Field Values
  - ARABIC
```
public static final int ARABIC
```
    Identifies the ARABIC range and decimal base.
    
    See Also:
    Constant Field Values
  - EASTERN_ARABIC
```
public static final int EASTERN_ARABIC
```
    Identifies the ARABIC range and ARABIC_EXTENDED decimal base.
    
    See Also:
    Constant Field Values
  - DEVANAGARI
```
public static final int DEVANAGARI
```
    Identifies the DEVANAGARI range and decimal base.
    
    See Also:
    Constant Field Values
  - BENGALI
```
public static final int BENGALI
```
    Identifies the BENGALI range and decimal base.
    
    See Also:
    Constant Field Values
  - GURMUKHI
```
public static final int GURMUKHI
```
    Identifies the GURMUKHI range and decimal base.
    
    See Also:
    Constant Field Values
  - GUJARATI
```
public static final int GUJARATI
```
    Identifies the GUJARATI range and decimal base.
    
    See Also:
    Constant Field Values
  - ORIYA
```
public static final int ORIYA
```
    Identifies the ORIYA range and decimal base.
    
    See Also:
    Constant Field Values
  - TAMIL
```
public static final int TAMIL
```
    Identifies the TAMIL range and decimal base.
    
    See Also:
    Constant Field Values
  - TELUGU
```
public static final int TELUGU
```
    Identifies the TELUGU range and decimal base.
    
    See Also:
    Constant Field Values
  - KANNADA
```
public static final int KANNADA
```
    Identifies the KANNADA range and decimal base.
    
    See Also:
    Constant Field Values
  - MALAYALAM
```
public static final int MALAYALAM
```
    Identifies the MALAYALAM range and decimal base.
    
    See Also:
    Constant Field Values
  - THAI
```
public static final int THAI
```
    Identifies the THAI range and decimal base.
    
    See Also:
    Constant Field Values
  - LAO
```
public static final int LAO
```
    Identifies the LAO range and decimal base.
    
    See Also:
    Constant Field Values
  - TIBETAN
```
public static final int TIBETAN
```
    Identifies the TIBETAN range and decimal base.
    
    See Also:
    Constant Field Values
  - MYANMAR
```
public static final int MYANMAR
```
    Identifies the MYANMAR range and decimal base.
    
    See Also:
    Constant Field Values
  - ETHIOPIC
```
public static final int ETHIOPIC
```
    Identifies the ETHIOPIC range and decimal base.
    
    See Also:
    Constant Field Values
  - KHMER
```
public static final int KHMER
```
    Identifies the KHMER range and decimal base.
    
    See Also:
    Constant Field Values
  - MONGOLIAN
```
public static final int MONGOLIAN
```
    Identifies the MONGOLIAN range and decimal base.
    
    See Also:
    Constant Field Values
  - ALL_RANGES
```
public static final int ALL_RANGES
```
    Identifies all ranges, for full contextual shaping.
    This constant specifies all of the bit mask-based ranges. Use EmunSet.allOf(NumericShaper.Range.class) to specify all of the enum-based ranges.
    
    See Also:
    Constant Field Values
- Method Detail
  - getShaper
```
public static NumericShaper getShaper(int singleRange)
```
    Returns a shaper for the provided unicode range. All Latin-1 (EUROPEAN) digits are converted to the corresponding decimal unicode digits.
    
    Parameters:
    singleRange - the specified Unicode range
    
    Returns:
    a non-contextual numeric shaper
    
    Throws:
    
    IllegalArgumentException - if the range is not a single range
  - getShaper
```
public static NumericShaper getShaper(NumericShaper.Range singleRange)
```
    Returns a shaper for the provided Unicode range. All Latin-1 (EUROPEAN) digits are converted to the corresponding decimal digits of the specified Unicode range.
    
    Parameters:
    singleRange - the Unicode range given by a NumericShaper.Range constant.
    
    Returns:
    a non-contextual NumericShaper.
    
    Throws:
    
    NullPointerException - if singleRange is null
    Since:
    
    1.7
  - getContextualShaper
```
public static NumericShaper getContextualShaper(int ranges)
```
    Returns a contextual shaper for the provided unicode range(s). Latin-1 (EUROPEAN) digits are converted to the decimal digits corresponding to the range of the preceding text, if the range is one of the provided ranges. Multiple ranges are represented by or-ing the values together, such as, NumericShaper.ARABIC | NumericShaper.THAI. The shaper assumes EUROPEAN as the starting context, that is, if EUROPEAN digits are encountered before any strong directional text in the string, the context is presumed to be EUROPEAN, and so the digits will not shape.
    
    Parameters:
    ranges - the specified Unicode ranges
    
    Returns:
    a shaper for the specified ranges
  - getContextualShaper
```
public static NumericShaper getContextualShaper(Set<NumericShaper.Range> ranges)
```
    Returns a contextual shaper for the provided Unicode range(s). The Latin-1 (EUROPEAN) digits are converted to the decimal digits corresponding to the range of the preceding text, if the range is one of the provided ranges.
    The shaper assumes EUROPEAN as the starting context, that is, if EUROPEAN digits are encountered before any strong directional text in the string, the context is presumed to be EUROPEAN, and so the digits will not shape.
    
    Parameters:
    ranges - the specified Unicode ranges
    
    Returns:
    a contextual shaper for the specified ranges
    
    Throws:
    
    NullPointerException - if ranges is null.
    Since:
    
    1.7
  - getContextualShaper
```
public static NumericShaper getContextualShaper(int ranges,
                                int defaultContext)
```
    Returns a contextual shaper for the provided unicode range(s). Latin-1 (EUROPEAN) digits will be converted to the decimal digits corresponding to the range of the preceding text, if the range is one of the provided ranges. Multiple ranges are represented by or-ing the values together, for example, NumericShaper.ARABIC | NumericShaper.THAI. The shaper uses defaultContext as the starting context.
    
    Parameters:
    ranges - the specified Unicode ranges
    defaultContext - the starting context, such as NumericShaper.EUROPEAN
    
    Returns:
    a shaper for the specified Unicode ranges.
    
    Throws:
    
    IllegalArgumentException - if the specified defaultContext is not a single valid range.
  - getContextualShaper
```
public static NumericShaper getContextualShaper(Set<NumericShaper.Range> ranges,
                                NumericShaper.Range defaultContext)
```
    Returns a contextual shaper for the provided Unicode range(s). The Latin-1 (EUROPEAN) digits will be converted to the decimal digits corresponding to the range of the preceding text, if the range is one of the provided ranges. The shaper uses defaultContext as the starting context.
    
    Parameters:
    ranges - the specified Unicode ranges
    defaultContext - the starting context, such as NumericShaper.Range.EUROPEAN
    
    Returns:
    a contextual shaper for the specified Unicode ranges.
    
    Throws:
    
    NullPointerException - if ranges or defaultContext is null
    Since:
    
    1.7
  - shape
```
public void shape(char[] text,
         int start,
         int count)
```
    Converts the digits in the text that occur between start and start + count.
    
    Parameters:
    text - an array of characters to convert
    start - the index into text to start converting
    count - the number of characters in text to convert
    
    Throws:
    
    IndexOutOfBoundsException - if start or start + count is out of bounds
    
    NullPointerException - if text is null
  - shape
```
public void shape(char[] text,
         int start,
         int count,
         int context)
```
    Converts the digits in the text that occur between start and start + count, using the provided context. Context is ignored if the shaper is not a contextual shaper.
    
    Parameters:
    text - an array of characters
    start - the index into text to start converting
    count - the number of characters in text to convert
    context - the context to which to convert the characters, such as NumericShaper.EUROPEAN
    
    Throws:
    
    IndexOutOfBoundsException - if start or start + count is out of bounds
    
    NullPointerException - if text is null
    
    IllegalArgumentException - if this is a contextual shaper and the specified context is not a single valid range.
  - shape
```
public void shape(char[] text,
         int start,
         int count,
         NumericShaper.Range context)
```
    Converts the digits in the text that occur between start and start + count, using the provided context. Context is ignored if the shaper is not a contextual shaper.
    
    Parameters:
    text - a char array
    start - the index into text to start converting
    count - the number of chars in text to convert
    context - the context to which to convert the characters, such as NumericShaper.Range.EUROPEAN
    
    Throws:
    
    IndexOutOfBoundsException - if start or start + count is out of bounds
    
    NullPointerException - if text or context is null
    Since:
    
    1.7
  - isContextual
```
public boolean isContextual()
```
    Returns a boolean indicating whether or not this shaper shapes contextually.
    
    Returns:
    true if this shaper is contextual; false otherwise.
  - getRanges
```
public int getRanges()
```
    Returns an int that ORs together the values for all the ranges that will be shaped.
    For example, to check if a shaper shapes to Arabic, you would use the following:
    if ((shaper.getRanges() & shaper.ARABIC) != 0) { ...
    
    Note that this method supports only the bit mask-based ranges. Call getRangeSet() for the enum-based ranges.
    
    Returns:
    the values for all the ranges to be shaped.
  - getRangeSet
```
public Set<NumericShaper.Range> getRangeSet()
```
    Returns a Set representing all the Unicode ranges in this NumericShaper that will be shaped.
    
    Returns:
    all the Unicode ranges to be shaped.
    Since:
    
    1.7
  - hashCode
```
public int hashCode()
```
    Returns a hash code for this shaper.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    this shaper's hash code.
    See Also:
    Object.hashCode()
  - equals
```
public boolean equals(Object o)
```
    Returns true if the specified object is an instance of NumericShaper and shapes identically to this one, regardless of the range representations, the bit mask or the enum. For example, the following code produces "true".
    NumericShaper ns1 = NumericShaper.getShaper(NumericShaper.ARABIC); NumericShaper ns2 = NumericShaper.getShaper(NumericShaper.Range.ARABIC); System.out.println(ns1.equals(ns2));
    Overrides:
    
    equals in class Object
    
    Parameters:
    o - the specified object to compare to this NumericShaper
    
    Returns:
    true if o is an instance of NumericShaper and shapes in the same way; false otherwise.
    See Also:
    Object.equals(java.lang.Object)
  - toString
```
public String toString()
```
    Returns a String that describes this shaper. This method is used for debugging purposes only.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    a String describing this shaper.

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DRAFT ea-b138

Class NumericShaper

Nested Class Summary

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

EUROPEAN

ARABIC

EASTERN_ARABIC

DEVANAGARI

BENGALI

GURMUKHI

GUJARATI

ORIYA

TAMIL

TELUGU

KANNADA

MALAYALAM

THAI

LAO

TIBETAN

MYANMAR

ETHIOPIC

KHMER

MONGOLIAN

ALL_RANGES

Method Detail

getShaper

getShaper

getContextualShaper

getContextualShaper

getContextualShaper

getContextualShaper

shape

shape

shape

isContextual

getRanges

getRangeSet

hashCode

equals

toString