gnu.crypto.assembly
Class DeflateTransformer

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

class DeflateTransformer

extends Transformer

A Transformer Adapter allowing inclusion of a DEFLATE compression algorithm in an Assembly chain. The Direction.FORWARD transformation is a compression (deflate) of input data, while the Direction.REVERSED one is a decompression (inflate) that restores the original data.

This Transformer uses a Deflater instance to carry on the compression, and an Inflater to do the decompression.

When using such a Transformer, in an Assembly, there must be at least one element behind this instance in the constructed chain; otherwise, a TransformerException is thrown at initialisation time.

Version:

Revision: $

Field Summary

Fields inherited from class gnu.crypto.assembly.Transformer

DIRECTION, inBuffer, mode, outBuffer, tail, wired

Constructor Summary

(package private)

DeflateTransformer()

Method Summary

(package private) int	delegateBlockSize()
(package private) void	initDelegate(java.util.Map attributes)
(package private) byte[]	lastUpdateDelegate()
(package private) void	resetDelegate()
(package private) byte[]	updateDelegate(byte[] in, int offset, int length)

Methods inherited from class gnu.crypto.assembly.Transformer

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

Methods inherited from class java.lang.Object

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

Constructor Detail

DeflateTransformer

DeflateTransformer()

Method Detail

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