com.stimulsoft.lib.base64
Class StiBase64DecoderUtil

java.lang.Object
  com.stimulsoft.lib.base64.StiBase64DecoderUtil

public final class StiBase64DecoderUtil
extends java.lang.Object

Class decodes a Base64 encoded data back into the original byte representation and writes to output stream.

Constructor Summary

StiBase64DecoderUtil(java.io.OutputStream stream)
Construct a Base64Decoder waiting on calls to its translate() method.

Method Summary

static byte[]	decode(byte[] data) Decode given byte array into a decoded byte array.
static byte[]	decode(byte[] data, int begin, int end) Decode given byte array into a decoded byte array.
static void	decode(java.io.InputStream input, java.io.OutputStream out) Decode bytes from input stream and write decoded bytes to output stream.
static void	decode(java.io.InputStream input, java.io.OutputStream out, long count) Decode bytes from input stream and write decoded bytes to output stream.
static byte[]	decode(java.lang.String str)
void	flush() Writes all decoded octets.
StiBase64DecoderUtil	translate(byte[] bytes) Translate every base64 character from given byte array into a sextet byte value by using above translation array.
StiBase64DecoderUtil	translate(byte[] bytes, int begin, int end) Translate every base64 character from given byte array into a sextet byte value by using above translation array.

Methods inherited from class java.lang.Object

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

Constructor Detail

StiBase64DecoderUtil

public StiBase64DecoderUtil(java.io.OutputStream stream)

Construct a Base64Decoder waiting on calls to its translate() method. Base64Decoder must be flushed to write internally buffered data to output stream.

Method Detail

decode

public static void decode(java.io.InputStream input,
                          java.io.OutputStream out)
                   throws java.io.IOException

Decode bytes from input stream and write decoded bytes to output stream.

Parameters:

input - input stream

out - output stream

Throws:

java.io.IOException - if an I/O error occurs

decode

public static void decode(java.io.InputStream input,
                          java.io.OutputStream out,
                          long count)
                   throws java.io.IOException

Decode bytes from input stream and write decoded bytes to output stream.

Parameters:

input - input stream

out - output stream

count - count of bytes to read and decode; -1 for all available bytes

Throws:

java.io.IOException - if an I/O error occurs

decode

public static byte[] decode(java.lang.String str)

decode

public static byte[] decode(byte[] data)

Decode given byte array into a decoded byte array.

Parameters:

data - Base64 byte array to be decoded.

Returns:

All decoded octets as byte array.

decode

public static byte[] decode(byte[] data,
                            int begin,
                            int end)

Decode given byte array into a decoded byte array.

Parameters:

data - Base64 byte array to be decoded

begin - index of the first byte to start from

end - index after the last byte

Returns:

All decoded octets as byte array.

translate

public StiBase64DecoderUtil translate(byte[] bytes)
                               throws java.io.IOException

Translate every base64 character from given byte array into a sextet byte value by using above translation array. The sextets are then shifted into an buffer until the buffer contains 4 sextets which are then decoded into 3 octets. The translate and decode process is continued until all bytes of given byte array are evaluated. If there are remaining sextets in the buffer they also will be converted into octets at the end. All the converted octets are written to the output stream.

Parameters:

bytes - the byte array to be decoded

Returns:

Base64Decoder

Throws:

java.io.IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

translate

public StiBase64DecoderUtil translate(byte[] bytes,
                                      int begin,
                                      int end)
                               throws java.io.IOException

Translate every base64 character from given byte array into a sextet byte value by using above translation array. The sextets are then shifted into an buffer until the buffer contains 4 sextets which are then decoded into 3 octets. The translate and decode process is continued until all bytes of given byte array are evaluated. If there are remaining sextets in the buffer they also will be converted into octets at the end. All the converted octets are written to the output stream.

Parameters:

bytes - the byte array to be decoded

begin - index of the first byte to start from

end - index after the last byte

Returns:

Base64Decoder

Throws:

java.io.IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

flush

public void flush()
           throws java.io.IOException

Writes all decoded octets.

Throws:

java.io.IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.