org.apache.xmlgraphics.util.io

Class ASCII85InputStream

java.lang.Object

java.io.InputStream

org.apache.xmlgraphics.util.io.ASCII85InputStream

All Implemented Interfaces:

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

public class ASCII85InputStream
extends java.io.InputStream
implements ASCII85Constants

This class applies a ASCII85 decoding to the stream.

The class is derived from InputStream instead of FilteredInputStream because we can use the read(byte[], int, int) method from InputStream which simply delegates to read(). This makes the implementation easier.

The filter is described in chapter 3.13.3 of the PostScript Language Reference (third edition).

Version:

$Id: ASCII85InputStream.java 1732018 2016-02-24 04:51:06Z gadams $

Field Summary

Fields

Modifier and Type	Field and Description
private int[]	b
private int	bIndex
private int	bSize
private boolean	eodReached
private java.io.InputStream	in

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

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

Constructor Summary

Constructors

Constructor and Description
ASCII85InputStream(java.io.InputStream in)

Method Summary

Modifier and Type	Method and Description
private int	filteredRead()
private void	handleEOD()
int	read()
private void	readNextTuple()

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

in

private java.io.InputStream in

eodReached

private boolean eodReached

b

private int[] b

bSize

private int bSize

bIndex

private int bIndex

Constructor Detail

ASCII85InputStream

public ASCII85InputStream(java.io.InputStream in)

See Also:

FilterInputStream

Method Detail

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

See Also:

FilterInputStream

filteredRead

private int filteredRead()
                  throws java.io.IOException

Throws:

java.io.IOException

handleEOD

private void handleEOD()
                throws java.io.IOException

Throws:

java.io.IOException

readNextTuple

private void readNextTuple()
                    throws java.io.IOException

Throws:

java.io.IOException