Class Bzip2Decoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

io.netty.handler.codec.compression.Bzip2Decoder

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public class Bzip2Decoder
extends ByteToMessageDecoder

Uncompresses a ByteBuf encoded with the Bzip2 format. See Bzip2.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static enum	Bzip2Decoder.State	Current state of stream.

Nested classes/interfaces inherited from class ByteToMessageDecoder

ByteToMessageDecoder.Cumulator

Nested classes/interfaces inherited from interface ChannelHandler

ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field	Description
private int	blockCRC	The CRC of the current block as read from the block header.
private Bzip2BlockDecompressor	blockDecompressor	The decompressor for the current block.
private int	blockSize	Always: in the range 0 ..
private Bzip2Decoder.State	currentState
private Bzip2HuffmanStageDecoder	huffmanStageDecoder	Bzip2 Huffman coding stage.
private final Bzip2BitReader	reader	A reader that provides bit-level reads.
private int	streamCRC	The merged CRC of all blocks decompressed so far.

Fields inherited from class ByteToMessageDecoder

COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors

Constructor	Description
Bzip2Decoder()

Method Summary

Modifier and Type	Method	Description
protected void	decode(ChannelHandlerContext ctx, ByteBuf in, java.util.List<java.lang.Object> out)	Decode the from one ByteBuf to an other.
boolean	isClosed()	Returns true if and only if the end of the compressed stream has been reached.

Methods inherited from class ByteToMessageDecoder

actualReadableBytes, callDecode, channelInactive, channelRead, channelReadComplete, decodeLast, discardSomeReadBytes, handlerRemoved, handlerRemoved0, internalBuffer, isSingleDecode, setCumulator, setDiscardAfterReads, setSingleDecode, userEventTriggered

Methods inherited from class ChannelInboundHandlerAdapter

channelActive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught

Methods inherited from class ChannelHandlerAdapter

ensureNotSharable, handlerAdded, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface ChannelHandler

handlerAdded

Field Details

currentState

private Bzip2Decoder.State currentState

reader

private final Bzip2BitReader reader

A reader that provides bit-level reads.

blockDecompressor

private Bzip2BlockDecompressor blockDecompressor

The decompressor for the current block.

huffmanStageDecoder

private Bzip2HuffmanStageDecoder huffmanStageDecoder

Bzip2 Huffman coding stage.

blockSize

private int blockSize

Always: in the range 0 .. 9. The current block size is 100000 * this number.

blockCRC

private int blockCRC

The CRC of the current block as read from the block header.

streamCRC

private int streamCRC

The merged CRC of all blocks decompressed so far.

Constructor Details

Bzip2Decoder

public Bzip2Decoder()

Method Details

decode

protected void decode(ChannelHandlerContext ctx,
 ByteBuf in,
 java.util.List<java.lang.Object> out)
               throws java.lang.Exception

Description copied from class: ByteToMessageDecoder

Decode the from one ByteBuf to an other. This method will be called till either the input ByteBuf has nothing to read when return from this method or till nothing was read from the input ByteBuf.

Specified by:

decode in class ByteToMessageDecoder

Parameters:

ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to

in - the ByteBuf from which to read data

out - the List to which decoded messages should be added

Throws:

java.lang.Exception - is thrown if an error occurs

isClosed

public boolean isClosed()

Returns true if and only if the end of the compressed stream has been reached.