edu.internet2.middleware.morphString.apache.codec.binary

Class Base64

java.lang.Object

edu.internet2.middleware.morphString.apache.codec.binary.Base64

All Implemented Interfaces:

BinaryDecoder, BinaryEncoder, Decoder, Encoder

public class Base64
extends Object
implements BinaryEncoder, BinaryDecoder

Provides Base64 encoding and decoding as defined by RFC 2045.

This class implements section 6.8. Base64 Content-Transfer-Encoding from RFC 2045 Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies by Freed and Borenstein.

Since:

1.0-dev

Version:

$Id: Base64.java,v 1.1 2008-10-29 05:32:23 mchyzer Exp $

See Also:

RFC 2045

Constructor Summary

Constructors

Constructor and Description
Base64()

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	decode(byte[] pArray) Decodes a byte[] containing containing characters in the Base64 alphabet.
Object	decode(Object pObject) Decodes an Object using the base64 algorithm.
static byte[]	decodeBase64(byte[] base64Data) Decodes Base64 data into octects
byte[]	encode(byte[] pArray) Encodes a byte[] containing binary data, into a byte[] containing characters in the Base64 alphabet.
Object	encode(Object pObject) Encodes an Object using the base64 algorithm.
static byte[]	encodeBase64(byte[] binaryData) Encodes binary data using the base64 algorithm but does not chunk the output.
static byte[]	encodeBase64(byte[] binaryData, boolean isChunked) Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.
static byte[]	encodeBase64Chunked(byte[] binaryData) Encodes binary data using the base64 algorithm and chunks the encoded output into 76 character blocks
static boolean	isArrayByteBase64(byte[] arrayOctect) Tests a given byte array to see if it contains only valid characters within the Base64 alphabet.

Methods inherited from class java.lang.Object

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

Constructor Detail

Base64

public Base64()

Method Detail

isArrayByteBase64

public static boolean isArrayByteBase64(byte[] arrayOctect)

Tests a given byte array to see if it contains only valid characters within the Base64 alphabet.

Parameters:

arrayOctect - byte array to test

Returns:

true if all bytes are valid characters in the Base64 alphabet or if the byte array is empty; false, otherwise

encodeBase64

public static byte[] encodeBase64(byte[] binaryData)

Encodes binary data using the base64 algorithm but does not chunk the output.

Parameters:

binaryData - binary data to encode

Returns:

Base64 characters

encodeBase64Chunked

public static byte[] encodeBase64Chunked(byte[] binaryData)

Encodes binary data using the base64 algorithm and chunks the encoded output into 76 character blocks

Parameters:

binaryData - binary data to encode

Returns:

Base64 characters chunked in 76 character blocks

decode

public Object decode(Object pObject)
              throws DecoderException

Decodes an Object using the base64 algorithm. This method is provided in order to satisfy the requirements of the Decoder interface, and will throw a DecoderException if the supplied object is not of type byte[].

Specified by:

decode in interface Decoder

Parameters:

pObject - Object to decode

Returns:

An object (of type byte[]) containing the binary data which corresponds to the byte[] supplied.

Throws:

DecoderException - if the parameter supplied is not of type byte[]

decode

public byte[] decode(byte[] pArray)

Decodes a byte[] containing containing characters in the Base64 alphabet.

Specified by:

decode in interface BinaryDecoder

Parameters:

pArray - A byte array containing Base64 character data

Returns:

a byte array containing binary data

encodeBase64

public static byte[] encodeBase64(byte[] binaryData,
                  boolean isChunked)

Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.

Parameters:

binaryData - Array containing binary data to encode.

isChunked - if isChunked is true this encoder will chunk the base64 output into 76 character blocks

Returns:

Base64-encoded data.

decodeBase64

public static byte[] decodeBase64(byte[] base64Data)

Decodes Base64 data into octects

Parameters:

base64Data - Byte array containing Base64 data

Returns:

Array containing decoded data.

encode

public Object encode(Object pObject)
              throws EncoderException

Encodes an Object using the base64 algorithm. This method is provided in order to satisfy the requirements of the Encoder interface, and will throw an EncoderException if the supplied object is not of type byte[].

Specified by:

encode in interface Encoder

Parameters:

pObject - Object to encode

Returns:

An object (of type byte[]) containing the base64 encoded data which corresponds to the byte[] supplied.

Throws:

EncoderException - if the parameter supplied is not of type byte[]

encode

public byte[] encode(byte[] pArray)

Encodes a byte[] containing binary data, into a byte[] containing characters in the Base64 alphabet.

Specified by:

encode in interface BinaryEncoder

Parameters:

pArray - a byte array containing binary data

Returns:

A byte array containing only Base64 character data