gnu.crypto.assembly
Class LoopbackTransformer

java.lang.Object
  gnu.crypto.assembly.Transformer
      gnu.crypto.assembly.LoopbackTransformer

final class LoopbackTransformer

extends Transformer

A trivial Transformer to allow closing a chain in an Assembly. This class is not visible outside this package.

Version:

$Revision: 1.2 $

Field Summary

Fields inherited from class gnu.crypto.assembly.Transformer

DIRECTION, inBuffer, mode, outBuffer, tail, wired

Constructor Summary

(package private)

LoopbackTransformer() Trivial protected constructor.

Method Summary

(package private) int	delegateBlockSize()
void	init(java.util.Map attributes) Initialises the Transformer for operation with specific characteristics.
(package private) void	initDelegate(java.util.Map attributes)
byte[]	lastUpdate() Convenience method that calls the same method with three arguments.
(package private) byte[]	lastUpdateDelegate()
void	reset() Resets the Transformer for re-initialisation and use with other characteristics.
(package private) void	resetDelegate()
byte[]	update(byte[] in, int offset, int length) Processes a designated number of bytes from a given byte array.
(package private) byte[]	updateDelegate(byte[] in, int offset, int length)

Methods inherited from class gnu.crypto.assembly.Transformer

currentBlockSize, getCascadeTransformer, getDeflateTransformer, getPaddingTransformer, isPostProcessing, isPreProcessing, lastUpdate, lastUpdate, lastUpdate, setMode, update, update

Methods inherited from class java.lang.Object

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

Constructor Detail

LoopbackTransformer

LoopbackTransformer()

Trivial protected constructor.

Method Detail

init

public void init(java.util.Map attributes)
          throws TransformerException

Description copied from class: Transformer

Initialises the Transformer for operation with specific characteristics.

Overrides:

init in class Transformer

Parameters:

attributes - a set of name-value pairs that describes the desired future behaviour of this instance.

Throws:

TransformerException

reset

public void reset()

Description copied from class: Transformer

Resets the Transformer for re-initialisation and use with other characteristics. This method always succeeds.

Overrides:

reset in class Transformer

update

public byte[] update(byte[] in,
                     int offset,
                     int length)
              throws TransformerException

Description copied from class: Transformer

Processes a designated number of bytes from a given byte array.

Overrides:

update in class Transformer

Parameters:

in - the input data bytes.

offset - index of in from which to start considering data.

length - the count of bytes to process.

Returns:

the result of transformation.

Throws:

TransformerException - if a transformation-related exception occurs during the operation.

lastUpdate

public byte[] lastUpdate()
                  throws TransformerException

Description copied from class: Transformer

Convenience method that calls the same method with three arguments. A zero-long byte array is used.

Overrides:

lastUpdate in class Transformer

Returns:

the result of transformation.

Throws:

TransformerException - if a transformation-related exception occurs during the operation.

See Also:

Transformer.lastUpdate(byte[], int, int)

initDelegate

void initDelegate(java.util.Map attributes)
            throws TransformerException

Specified by:

initDelegate in class Transformer

Throws:

TransformerException

delegateBlockSize

int delegateBlockSize()

Specified by:

delegateBlockSize in class Transformer

resetDelegate

void resetDelegate()

Specified by:

resetDelegate in class Transformer

updateDelegate

byte[] updateDelegate(byte[] in,
                      int offset,
                      int length)
                throws TransformerException

Specified by:

updateDelegate in class Transformer

Throws:

TransformerException

lastUpdateDelegate

byte[] lastUpdateDelegate()
                    throws TransformerException

Specified by:

lastUpdateDelegate in class Transformer

Throws:

TransformerException