com.jkristian.io
Class Base64EncodeOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          com.jkristian.io.Base64EncodeOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

public class Base64EncodeOutputStream
extends java.io.FilterOutputStream

A filter that encodes output from binary bytes to base64 encoding. This filter doesn't break the encoded data into lines (as required for MIME); use another filter to do that, if needed.

Base64 encoding is defined by RFC 2045 (MIME) section 6.8.

Field Summary

protected static byte[]	map Maps from a sextet to its encoding.
protected static byte	PAD This byte is appended to encoded data, as needed to make the encoding an integral multiple of four bytes long.

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Base64EncodeOutputStream(java.io.OutputStream out)

Method Summary

void	flush()
static void	main(java.lang.String[] args) A unit test.
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class java.io.FilterOutputStream

close, write

Methods inherited from class java.lang.Object

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

Field Detail

PAD

protected static final byte PAD

This byte is appended to encoded data, as needed to make the encoding an integral multiple of four bytes long.

See Also:

Constant Field Values

map

protected static final byte[] map

Maps from a sextet to its encoding.

Constructor Detail

Base64EncodeOutputStream

public Base64EncodeOutputStream(java.io.OutputStream out)

Parameters:

out - should be buffered (e.g. a BufferedOutputStream) for best performance. This class will write to it four bytes at a time.

Method Detail

write

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

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

flush

public void flush()
           throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.FilterOutputStream

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

A unit test.

Throws:

java.io.IOException