org.apache.xmlgraphics.util.io

Class Base64DecodeStream

java.lang.Object

java.io.InputStream

org.apache.xmlgraphics.util.io.Base64DecodeStream

All Implemented Interfaces:

Closeable

public class Base64DecodeStream
extends 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:

$Id$ Originally authored by Thomas DeWeese, Vincent Hardy, and Chuck McManis.

Constructor Summary

Constructors

Constructor and Description
Base64DecodeStream(InputStream src)

Method Summary

Methods

Modifier and Type	Method and Description
int	available()
void	close()
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

Constructor Detail

Base64DecodeStream

public Base64DecodeStream(InputStream src)

Method Detail

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

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

Overrides:

read in class InputStream

Throws:

IOException