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Class sun.server.util.BASE64Decoder 

java.lang.Object
   |
   +----sun.server.util.CharacterDecoder
           |
           +----sun.server.util.BASE64Decoder
public class BASE64Decoder
extends CharacterDecoder
This class implements a BASE64 Character decoder as specified in RFC1521. This RFC is part of the MIME specification which is published by the Internet Engineering Task Force (IETF). 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	mydata[];
	BASE64Decoder base64 = new BASE64Decoder();
	mydata = base64.decodeBuffer(bufferString);
This will decode the String in bufferString and give you an array of bytes in the array myData. On errors, this class throws a CEFormatException with the following detail strings: 
    "BASE64Decoder: Not enough bytes for an atom."

See Also:
CharacterEncoder, BASE64Decoder

Constructor Index

o BASE64Decoder()

Method Index

o bytesPerAtom()
This class has 4 bytes per atom
o bytesPerLine()
Any multiple of 4 will do, 72 might be common
o decodeAtom(InputStream, OutputStream, int)
Decode one BASE64 atom into 1, 2, or 3 bytes of data.

Constructors

o BASE64Decoder 
 public BASE64Decoder()

Methods

o bytesPerAtom 
 protected int bytesPerAtom()
This class has 4 bytes per atom

Overrides:
bytesPerAtom in class CharacterDecoder
o bytesPerLine 
 protected int bytesPerLine()
Any multiple of 4 will do, 72 might be common

Overrides:
bytesPerLine in class CharacterDecoder
o decodeAtom 
 protected void decodeAtom(InputStream inStream,
                           OutputStream outStream,
                           int rem) throws IOException
Decode one BASE64 atom into 1, 2, or 3 bytes of data.

Overrides:
decodeAtom in class CharacterDecoder 
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