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.Range.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.

NumericShaper constants precedence
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

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

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

Modifier and Type

Method

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 declared in class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details
- 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 EnumSet.allOf(NumericShaper.Range.class) to specify all of the enum-based ranges.
  
  See Also:
  
  Constant Field Values
Method Details
- 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.

Class NumericShaper

Nested Class Summary

Field Summary

Method Summary

Methods declared in class java.lang.Object

Field Details

EUROPEAN

ARABIC

EASTERN_ARABIC

DEVANAGARI

BENGALI

GURMUKHI

GUJARATI

ORIYA

TAMIL

TELUGU

KANNADA

MALAYALAM

THAI

LAO

TIBETAN

MYANMAR

ETHIOPIC

KHMER

MONGOLIAN

ALL_RANGES

Method Details

getShaper

getShaper

getContextualShaper

getContextualShaper

getContextualShaper

getContextualShaper

shape

shape

shape

isContextual

getRanges

getRangeSet

hashCode

equals

toString