org.apache.xmlgraphics.util.io

Class Base64DecodeStream

java.lang.Object

java.io.InputStream

org.apache.xmlgraphics.util.io.Base64DecodeStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class Base64DecodeStream
extends java.io.InputStream

This class implements a Base64 Character decoder as specified in RFC1113. Unlike some other encoding schemes there is nothing in this encoding that tells the decoder where a buffer starts or stops, so to use it you will need to isolate your encoded data into a single chunk and then feed them this decoder. The simplest way to do that is to read all of the encoded data into a string and then use:

      byte    data[];
      InputStream is = new ByteArrayInputStream(data);
      is = new Base64DecodeStream(is);
 

On errors, this class throws a IOException with the following detail strings:

    "Base64DecodeStream: Bad Padding byte (2)."
    "Base64DecodeStream: Bad Padding byte (1)."
 

Version:

$Id: Base64DecodeStream.java 1732018 2016-02-24 04:51:06Z gadams $ Originally authored by Thomas DeWeese, Vincent Hardy, and Chuck McManis.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) byte[]	decodeBuffer
(package private) boolean	eof
(package private) byte[]	outBuffer
(package private) int	outOffset
private static byte[]	PEM_ARRAY
(package private) java.io.InputStream	src

Constructor Summary

Constructors

Constructor and Description
Base64DecodeStream(java.io.InputStream src)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
(package private) boolean	getNextAtom()
boolean	markSupported()
int	read()
int	read(byte[] out, int offset, int len)

Methods inherited from class java.io.InputStream

mark, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

src

java.io.InputStream src

PEM_ARRAY

private static final byte[] PEM_ARRAY

decodeBuffer

byte[] decodeBuffer

outBuffer

byte[] outBuffer

outOffset

int outOffset

eof

boolean eof

Constructor Detail

Base64DecodeStream

public Base64DecodeStream(java.io.InputStream src)

Method Detail

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.InputStream

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.InputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.InputStream

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

public int read(byte[] out,
                int offset,
                int len)
         throws java.io.IOException

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

getNextAtom

final boolean getNextAtom()
                   throws java.io.IOException

Throws:

java.io.IOException