sun.io
Class CharToByteDoubleByte

java.lang.Object
  sun.io.CharToByteConverter
      sun.io.CharToByteDoubleByte

Direct Known Subclasses:

CharToByteBig5, CharToByteEUC_CN, CharToByteEUC_KR, CharToByteGBK, CharToByteJIS0208, CharToByteJohab

public abstract class CharToByteDoubleByte
extends CharToByteConverter

Field Summary

protected int	badInputLength
protected char	highHalfZoneCode
protected short[]	index1
protected String[]	index2

Fields inherited from class sun.io.CharToByteConverter

byteOff, charOff, subBytes, subMode

Constructor Summary

CharToByteDoubleByte()

Method Summary

boolean	canConvert(char ch) Return whether a character is mappable or not
int	convert(char[] input, int inOff, int inEnd, byte[] output, int outOff, int outEnd) Converts characters to sequences of bytes.
protected int	convSingleByte(char inputChar, byte[] outputByte)
int	flush(byte[] output, int outStart, int outEnd) Writes any remaining output to the output buffer and resets the converter to its initial state.
int	getMaxBytesPerChar() the maximum number of bytes needed to hold a converted char
protected int	getNative(char ch)
void	reset() Resets the converter.

Methods inherited from class sun.io.CharToByteConverter

convertAll, convertAny, flushAny, getBadInputLength, getCharacterEncoding, getConverter, getDefault, nextByteIndex, nextCharIndex, setSubstitutionBytes, setSubstitutionMode, toString

Methods inherited from class java.lang.Object

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

Field Detail

index1

protected short[] index1

index2

protected String[] index2

badInputLength

protected int badInputLength

highHalfZoneCode

protected char highHalfZoneCode

Constructor Detail

CharToByteDoubleByte

public CharToByteDoubleByte()

Method Detail

flush

public int flush(byte[] output,
                 int outStart,
                 int outEnd)
          throws MalformedInputException,
                 ConversionBufferFullException

Description copied from class: CharToByteConverter

Writes any remaining output to the output buffer and resets the converter to its initial state.

Specified by:

flush in class CharToByteConverter

Parameters:

output - byte array to receive flushed output.

outStart - start writing to output array at this offset.

outEnd - stop writing to output array at this offset (exclusive).

Throws:

MalformedInputException - if the output to be flushed contained a partial or invalid multibyte character sequence. Will occur if the input buffer on the last call to convert ended with the first character of a surrogate pair. flush will write what it can to the output buffer and reset the converter before throwing this exception. An additional call to flush is not required.

ConversionBufferFullException - if output array is filled before all the output can be flushed. flush will write what it can to the output buffer and remember its state. An additional call to flush with a new output buffer will conclude the operation.

convert

public int convert(char[] input,
                   int inOff,
                   int inEnd,
                   byte[] output,
                   int outOff,
                   int outEnd)
            throws MalformedInputException,
                   UnknownCharacterException,
                   ConversionBufferFullException

Converts characters to sequences of bytes. Conversions that result in Exceptions can be restarted by calling convert again, with appropriately modified parameters.

Specified by:

convert in class CharToByteConverter

Parameters:

input - char array containing text in Unicode

inStart - offset in input array

inEnd - offset of last byte to be converted

output - byte array to receive conversion result

outStart - starting offset

outEnd - offset of last byte to be written to

Returns:

the characters written to output.

Throws:

MalformedInputException - if the input buffer contains any sequence of chars that is illegal in Unicode (principally unpaired surrogates and ? or ?). After this exception is thrown, the method nextCharIndex can be called to obtain the index of the first invalid input character. The MalformedInputException can be queried for the length of the invalid input.

UnknownCharacterException - for any character that that cannot be converted to the external character encoding. Thrown only when converter is not in substitution mode.

ConversionBufferFullException - if output array is filled prior to converting all the input.

getMaxBytesPerChar

public int getMaxBytesPerChar()

the maximum number of bytes needed to hold a converted char

Specified by:

getMaxBytesPerChar in class CharToByteConverter

reset

public void reset()

Resets the converter. Call this method to reset the converter to its initial state

Specified by:

reset in class CharToByteConverter

canConvert

public boolean canConvert(char ch)

Return whether a character is mappable or not

Overrides:

canConvert in class CharToByteConverter

Parameters:

ch - character to test

Returns:

true if a character is mappable

convSingleByte

protected int convSingleByte(char inputChar,
                             byte[] outputByte)

getNative

protected int getNative(char ch)