sun.io
Class CharToByteDBCS_ASCII

java.lang.Object
  sun.io.CharToByteConverter
      sun.io.CharToByteDBCS_ASCII

Direct Known Subclasses:

CharToByteCp1381, CharToByteCp1383, CharToByteCp942, CharToByteCp942C, CharToByteCp943, CharToByteCp943C, CharToByteCp948, CharToByteCp950

public abstract class CharToByteDBCS_ASCII
extends CharToByteConverter

Field Summary

protected short[]	index1
protected String	index2
protected String	index2a
protected int	mask1
protected int	mask2
protected int	shift

Fields inherited from class sun.io.CharToByteConverter

badInputLength, byteOff, charOff, subBytes, subMode

Constructor Summary

CharToByteDBCS_ASCII()

Method Summary

boolean	canConvert(char ch) Returns true if the given character can be converted to the target character encoding.
int	convert(char[] input, int inOff, int inEnd, byte[] output, int outOff, int outEnd) Character conversion
int	flush(byte[] output, int outStart, int outEnd) flush out any residual data and reset the buffer state
int	getMaxBytesPerChar() Returns the maximum number of bytes needed to convert a char.
void	reset() Resets converter to its initial state.

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

index2a

protected String index2a

mask1

protected int mask1

mask2

protected int mask2

shift

protected int shift

Constructor Detail

CharToByteDBCS_ASCII

public CharToByteDBCS_ASCII()

Method Detail

flush

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

flush out any residual data and reset the buffer 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 UnknownCharacterException,
                   MalformedInputException,
                   ConversionBufferFullException

Character conversion

Specified by:

convert in class CharToByteConverter

Parameters:

input - array containing Unicode characters to be converted.

inOff - begin conversion at this offset in input array.

inEnd - stop conversion at this offset in input array (exclusive).

output - byte array to receive conversion result.

outOff - start writing to output array at this offset.

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

Returns:

the number of bytes written to output.

Throws:

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

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.

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

reset

public void reset()

Resets converter to its initial state.

Specified by:

reset in class CharToByteConverter

getMaxBytesPerChar

public int getMaxBytesPerChar()

Returns the maximum number of bytes needed to convert a char.

Specified by:

getMaxBytesPerChar in class CharToByteConverter

canConvert

public boolean canConvert(char ch)

Returns true if the given character can be converted to the target character encoding.

Overrides:

canConvert in class CharToByteConverter

Parameters:

ch - character to test

Returns:

true if given character is translatable, false otherwise.