org.apache.xmlgraphics.util.io

Class ASCII85OutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

org.apache.xmlgraphics.util.io.ASCII85OutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable, ASCII85Constants, Finalizable

public class ASCII85OutputStream
extends java.io.FilterOutputStream
implements ASCII85Constants, Finalizable

This class applies a ASCII85 encoding to the stream.

Version:

$Id: ASCII85OutputStream.java 1732018 2016-02-24 04:51:06Z gadams $

Field Summary

Fields

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

Fields inherited from class java.io.FilterOutputStream

out

Fields inherited from interface org.apache.xmlgraphics.util.io.ASCII85Constants

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

Constructor Summary

Constructors

Constructor and Description
ASCII85OutputStream(java.io.OutputStream out)

Method Summary

Modifier and Type	Method and 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 java.io.FilterOutputStream

flush, write, write

Methods inherited from class java.lang.Object

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

Field Detail

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 Detail

ASCII85OutputStream

public ASCII85OutputStream(java.io.OutputStream out)

See Also:

FilterOutputStream

Method Detail

write

public void write(int b)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

See Also:

FilterOutputStream

checkedWrite

private void checkedWrite(byte[] buf)
                   throws java.io.IOException

Throws:

java.io.IOException

checkedWrite

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

Throws:

java.io.IOException

checkedWrite

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

Throws:

java.io.IOException

checkedWrite

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

Throws:

java.io.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 java.io.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:

java.io.IOException - In case of an IO problem

See Also:

Finalizable

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.FilterOutputStream

Throws:

java.io.IOException

See Also:

FilterOutputStream