org.apache.jackrabbit.util
Class Base64

java.lang.Object
  org.apache.jackrabbit.util.Base64

public class Base64
extends Object

Base64 provides Base64 encoding/decoding of strings and streams.

Method Summary

static long	calcEncodedLength(long dataLength) Calculates the size (i.e.
static void	decode(char[] chars, int off, int len, OutputStream out) Decode base64 encoded data.
static void	decode(char[] chars, OutputStream out) Decode base64 encoded data.
static void	decode(InputStream in, OutputStream out) Decode base64 encoded data.
static void	decode(Reader reader, OutputStream out) Decode base64 encoded data.
static void	decode(String data, OutputStream out) Decode base64 encoded data.
static void	encode(byte[] data, int off, int len, Writer writer) Outputs base64 representation of the specified data to a Writer.
static void	encode(InputStream in, OutputStream out) Outputs base64 representation of the specified stream data to an OutputStream.
static void	encode(InputStream in, Writer writer) Outputs base64 representation of the specified stream data to a Writer.
static long	guessDecodedLength(long encLength) Pessimistically guesses the size (i.e.

Methods inherited from class java.lang.Object

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

Method Detail

calcEncodedLength

public static long calcEncodedLength(long dataLength)

Calculates the size (i.e. number of bytes) of the base64 encoded output given the length (i.e. number of bytes) of the data to be encoded.

Parameters:

dataLength - length (i.e. number of bytes) of the data to be encoded

Returns:

size (i.e. number of bytes) of the base64 encoded output

guessDecodedLength

public static long guessDecodedLength(long encLength)

Pessimistically guesses the size (i.e. number of bytes) of the decoded output given the length (i.e. number of bytes) of the base64 encoded data.

Parameters:

encLength - length (i.e. number of bytes) of the base64 encoded data

Returns:

size (i.e. number of bytes) of the decoded output

encode

public static void encode(InputStream in,
                          Writer writer)
                   throws IOException

Outputs base64 representation of the specified stream data to a Writer.

Parameters:

in - stream data to be encoded

writer - writer to output the encoded data

Throws:

IOException - if an i/o error occurs

encode

public static void encode(InputStream in,
                          OutputStream out)
                   throws IOException

Outputs base64 representation of the specified stream data to an OutputStream.

Parameters:

in - stream data to be encoded

out - stream where the encoded data should be written to

Throws:

IOException - if an i/o error occurs

encode

public static void encode(byte[] data,
                          int off,
                          int len,
                          Writer writer)
                   throws IOException

Outputs base64 representation of the specified data to a Writer.

Parameters:

data - data to be encoded

off - offset within data at which to start encoding

len - length of data to encode

writer - writer to output the encoded data

Throws:

IOException - if an i/o error occurs

decode

public static void decode(Reader reader,
                          OutputStream out)
                   throws IOException

Decode base64 encoded data.

Parameters:

reader - reader for the base64 encoded data to be decoded

out - stream where the decoded data should be written to

Throws:

IOException - if an i/o error occurs

decode

public static void decode(InputStream in,
                          OutputStream out)
                   throws IOException

Decode base64 encoded data. The data read from the inputstream is assumed to be of charset "US-ASCII".

Parameters:

in - inputstream of the base64 encoded data to be decoded

out - stream where the decoded data should be written to

Throws:

IOException - if an i/o error occurs

decode

public static void decode(String data,
                          OutputStream out)
                   throws IOException

Decode base64 encoded data.

Parameters:

data - the base64 encoded data to be decoded

out - stream where the decoded data should be written to

Throws:

IOException - if an i/o error occurs

decode

public static void decode(char[] chars,
                          OutputStream out)
                   throws IOException

Decode base64 encoded data.

Parameters:

chars - the base64 encoded data to be decoded

out - stream where the decoded data should be written to

Throws:

IOException - if an i/o error occurs

decode

public static void decode(char[] chars,
                          int off,
                          int len,
                          OutputStream out)
                   throws IOException

Decode base64 encoded data.

Parameters:

chars - the base64 encoded data to be decoded

off - offset within data at which to start decoding

len - length of data to decode

out - stream where the decoded data should be written to

Throws:

IOException - if an i/o error occurs