org.cdlib.xtf.util
Class Base64

Object
  Base64

public class Base64
extends Object

Utility class that decodes Base64 data.

Constructor Summary

Base64()

Method Summary

private static String	decodeBits(int bits1, int pos1, int count1, int bits2, int pos2, int count2) Combines bits from two different bytes into a single character.
private static int	decodeChar(char c) Given a character in the Base64 set, figure out the decimal equivalent.
private static String	decodeQuantum(String quantum) Decodes a 4-character Base64 'quantum' into a 3-character string.
static String	decodeString(String base64) Decodes a full Base64 string to the corresponding normal string.

Methods inherited from class Object

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

Constructor Detail

Base64

public Base64()

Method Detail

decodeChar

private static int decodeChar(char c)

Given a character in the Base64 set, figure out the decimal equivalent.

Parameters:

c - The character to decode

Returns:

The decimal equivalent (also maps invalid chars to zero)

decodeBits

private static String decodeBits(int bits1,
                                 int pos1,
                                 int count1,
                                 int bits2,
                                 int pos2,
                                 int count2)

Combines bits from two different bytes into a single character.

decodeQuantum

private static String decodeQuantum(String quantum)

Decodes a 4-character Base64 'quantum' into a 3-character string.

decodeString

public static String decodeString(String base64)

Decodes a full Base64 string to the corresponding normal string.

Parameters:

base64 - The base64 string to decode (e.g. "HX1+9/6fE97=")

Returns:

Decoded version of the string.