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renderkits.util
Class Base64  view Base64 download Base64.java

java.lang.Object
  extended byrenderkits.util.Base64

public final class Base64
extends java.lang.Object

Base64 encoder and decoder.

This class provides encoding/decoding methods for the Base64 encoding as defined by RFC 2045, N. Freed and N. Borenstein. RFC 2045: Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies. Reference 1996. Available at: http://www.ietf.org/rfc/rfc2045.txt


Field Summary
private static byte[] base64Alphabet
           
private static int BASELENGTH
           
protected static java.lang.String DEFAULT_CHAR_ENCODING
           
private static int EIGHTBIT
           
private static byte[] EMPTY_BYTE_ARRAY
           
private static int FOURBYTE
           
private static byte[] lookUpBase64Alphabet
           
private static int LOOKUPLENGTH
           
private static byte PAD
           
private static int SIGN
           
private static int SIXBIT
           
private static int SIXTEENBIT
           
private static int TWENTYFOURBITGROUP
           
 
Constructor Summary
private Base64()
           
 
Method Summary
static byte[] decode(byte[] base64Data)
          Decodes Base64 data into octects
static byte[] encode(byte[] binaryData)
          Encodes hex octects into Base64
static java.lang.String encode(java.lang.String data)
          Returns the base64 encoding of String.
static java.lang.String encode(java.lang.String data, java.lang.String charEncoding)
          Returns the base64 encoding of String (by first converting to byte[], using the specified charEncoding).
static boolean isBase64(byte octect)
           
static boolean isBase64(byte[] arrayOctect)
           
static boolean isBase64(java.lang.String isValidString)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

DEFAULT_CHAR_ENCODING

protected static final java.lang.String DEFAULT_CHAR_ENCODING
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Constant Field Values

BASELENGTH

private static final int BASELENGTH
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Constant Field Values

LOOKUPLENGTH

private static final int LOOKUPLENGTH
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Constant Field Values

TWENTYFOURBITGROUP

private static final int TWENTYFOURBITGROUP
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Constant Field Values

EIGHTBIT

private static final int EIGHTBIT
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Constant Field Values

SIXTEENBIT

private static final int SIXTEENBIT
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Constant Field Values

SIXBIT

private static final int SIXBIT
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Constant Field Values

FOURBYTE

private static final int FOURBYTE
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Constant Field Values

SIGN

private static final int SIGN
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Constant Field Values

PAD

private static final byte PAD
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Constant Field Values

EMPTY_BYTE_ARRAY

private static final byte[] EMPTY_BYTE_ARRAY

base64Alphabet

private static byte[] base64Alphabet

lookUpBase64Alphabet

private static byte[] lookUpBase64Alphabet
Constructor Detail

Base64

private Base64()
Method Detail

isBase64

public static boolean isBase64(java.lang.String isValidString)

isBase64

public static boolean isBase64(byte octect)

isBase64

public static boolean isBase64(byte[] arrayOctect)

encode

public static byte[] encode(byte[] binaryData)
Encodes hex octects into Base64


encode

public static java.lang.String encode(java.lang.String data)
Returns the base64 encoding of String. First the String is converted to byte[], using the character encoding of ISO-8859-1.


encode

public static java.lang.String encode(java.lang.String data,
                                      java.lang.String charEncoding)
                               throws java.io.UnsupportedEncodingException
Returns the base64 encoding of String (by first converting to byte[], using the specified charEncoding). The return value is also a String. The Default codeEncoding is ISO-8859-1.


decode

public static byte[] decode(byte[] base64Data)
Decodes Base64 data into octects