Class ASCII85OutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

org.apache.xmlgraphics.util.io.ASCII85OutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable, ASCII85Constants, Finalizable

public class ASCII85OutputStream
extends FilterOutputStream
implements ASCII85Constants, Finalizable

This class applies a ASCII85 encoding to the stream.

Version:

$Id$

Field Summary

Fields

Modifier and Type	Field	Description
private long	buffer
private int	bw
private static final boolean	DEBUG
private int	pos
private int	posinline

Fields inherited from class FilterOutputStream

out

Fields inherited from interface ASCII85Constants

END, EOD, EOL, POW85, START, ZERO, ZERO_ARRAY

Constructor Summary

Constructors

Constructor	Description
ASCII85OutputStream(OutputStream out)

Method Summary

Modifier and Type	Method	Description
private void	checkedWrite(byte[] buf)
private void	checkedWrite(byte[] buf, boolean nosplit)
private void	checkedWrite(byte[] buf, int len)
private void	checkedWrite(byte[] buf, int len, boolean nosplit)
void	close()
private byte[]	convertWord(long word)	This converts a 32 bit value (4 bytes) into 5 bytes using base 85.
void	finalizeStream()	This method can be called instead of close() on a subclass of FilteredOutputStream when a final marker has to be written to the target stream, but close() cannot be called.
void	write(int b)

Methods inherited from class FilterOutputStream

flush, write, write

Methods inherited from class OutputStream

nullOutputStream

Methods inherited from class Object

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

Field Details

DEBUG

private static final boolean DEBUG

See Also:

• Constant Field Values

pos

private int pos

buffer

private long buffer

posinline

private int posinline

bw

private int bw

Constructor Details

ASCII85OutputStream

public ASCII85OutputStream(OutputStream out)

See Also:

• FilterOutputStream

Method Details

write

public void write(int b)
           throws IOException

Overrides:

write in class FilterOutputStream

Throws:

IOException

See Also:

• FilterOutputStream

checkedWrite

private void checkedWrite(byte[] buf)
                   throws IOException

Throws:

IOException

checkedWrite

private void checkedWrite(byte[] buf,
 boolean nosplit)
                   throws IOException

Throws:

IOException

checkedWrite

private void checkedWrite(byte[] buf,
 int len)
                   throws IOException

Throws:

IOException

checkedWrite

private void checkedWrite(byte[] buf,
 int len,
 boolean nosplit)
                   throws IOException

Throws:

IOException

convertWord

private byte[] convertWord(long word)

This converts a 32 bit value (4 bytes) into 5 bytes using base 85. each byte in the result starts with zero at the '!' character so the resulting base85 number fits into printable ascii chars

Parameters:

word - the 32 bit unsigned (hence the long datatype) word

Returns:

5 bytes (or a single byte of the 'z' character for word values of 0)

finalizeStream

public void finalizeStream()
                    throws IOException

Description copied from interface: Finalizable

This method can be called instead of close() on a subclass of FilteredOutputStream when a final marker has to be written to the target stream, but close() cannot be called.

Specified by:

finalizeStream in interface Finalizable

Throws:

IOException - In case of an IO problem

See Also:

• Finalizable

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class FilterOutputStream

Throws:

IOException

See Also:

• FilterOutputStream