Block compressor that performs no compression. More...

#include <BlockCompressionCodecNone.h>

Inheritance diagram for Hypertable::BlockCompressionCodecNone:

Collaboration diagram for Hypertable::BlockCompressionCodecNone:

Public Member Functions
	BlockCompressionCodecNone (const Args &args)
	Constructor. More...

virtual void	deflate (const DynamicBuffer &input, DynamicBuffer &output, BlockHeader &header, size_t reserve=0)
	Transforms a buffer into a serialized block using no compression. More...

virtual void	inflate (const DynamicBuffer &input, DynamicBuffer &output, BlockHeader &header)
	Deserializes a block produced by deflate(). More...

virtual int	get_type ()
	Returns enum value representing compression type NONE. More...

Public Member Functions inherited from Hypertable::BlockCompressionCodec
virtual	~BlockCompressionCodec ()
	Destructor. More...

virtual void	set_args (const Args &args)
	Sets arguments to control compression behavior. More...

Additional Inherited Members
Public Types inherited from Hypertable::BlockCompressionCodec
enum	Type { UNKNOWN =-1, NONE =0, BMZ =1, ZLIB =2, LZO =3, QUICKLZ =4, SNAPPY =5, COMPRESSION_TYPE_LIMIT =6 }
	Enumeration for compression type. More...

typedef std::vector< String >	Args
	Compression codec argument vector. More...

Static Public Member Functions inherited from Hypertable::BlockCompressionCodec
static const char *	get_compressor_name (uint16_t algo)
	Returns string mnemonic for compression type. More...

Detailed Description

Block compressor that performs no compression.

This class exists provides a way to produce uncompressed serialized blocks using the BlockCompressionCodec framework.

Definition at line 40 of file BlockCompressionCodecNone.h.

Constructor & Destructor Documentation

Hypertable::BlockCompressionCodecNone::BlockCompressionCodecNone ( const Args & args )

inline

Constructor.

This constructor passes args to the default implementation of set_args() since it does not support any arguments.

Parameters

args	Arguments to control compression behavior

Exceptions

Exception Code set to Error::BLOCK_COMPRESSOR_INVALID_ARG

Definition at line 49 of file BlockCompressionCodecNone.h.

Member Function Documentation

void BlockCompressionCodecNone::deflate	(	const DynamicBuffer &	input,
		DynamicBuffer &	output,
		BlockHeader &	header,
		size_t	reserve = `0`
	)

virtual

Transforms a buffer into a serialized block using no compression.

This method reserves enough space in output to hold the serialized header followed by the input buffer followed by reserve bytes. The input buffer is copied directly to the output buffer and the compression type is set to BlockCompressionCodec::NONE. Before serailizing header, the data_length, data_zlength, data_checksum, and compression_type fields are set appropriately. The output buffer is formatted as follows:

header

uncompressed data

reserve

Parameters