Package nom.tam.fits.compression.algorithm.gzip2

Class GZip2Compressor<T extends Buffer>

java.lang.Object

nom.tam.fits.compression.algorithm.gzip.GZipCompressor<T>

nom.tam.fits.compression.algorithm.gzip2.GZip2Compressor<T>

Type Parameters:

T - The genetic type of element buffer to compress

All Implemented Interfaces:

ICompressor<T>

Direct Known Subclasses:

GZip2Compressor.DoubleGZip2Compressor, GZip2Compressor.FloatGZip2Compressor, GZip2Compressor.IntGZip2Compressor, GZip2Compressor.LongGZip2Compressor, GZip2Compressor.ShortGZip2Compressor

public abstract class GZip2Compressor<T extends Buffer>
extends GZipCompressor<T>

(for internal use) The GZIP2 compression algorithm.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	GZip2Compressor.ByteGZip2Compressor
static class	GZip2Compressor.DoubleGZip2Compressor
static class	GZip2Compressor.FloatGZip2Compressor
static class	GZip2Compressor.IntGZip2Compressor
static class	GZip2Compressor.LongGZip2Compressor
static class	GZip2Compressor.ShortGZip2Compressor

Nested classes/interfaces inherited from class nom.tam.fits.compression.algorithm.gzip.GZipCompressor

GZipCompressor.ByteGZipCompressor, GZipCompressor.DoubleGZipCompressor, GZipCompressor.FloatGZipCompressor, GZipCompressor.IntGZipCompressor, GZipCompressor.LongGZipCompressor, GZipCompressor.ShortGZipCompressor

Field Summary

Fields inherited from class nom.tam.fits.compression.algorithm.gzip.GZipCompressor

buffer, nioBuffer, primitiveSize

Constructor Summary

Constructors

Constructor	Description
GZip2Compressor(int primitiveSize)

Method Summary

Modifier and Type	Method	Description
boolean	compress(T pixelData, ByteBuffer compressed)	compress the buffer into the byte buffer.
void	decompress(ByteBuffer compressed, T pixelData)	Decompress the byte buffer and restore the buffer from it, again enough space must already be allocated.
byte[]	shuffle(byte[] byteArray)
byte[]	unshuffle(byte[] byteArray)

Methods inherited from class nom.tam.fits.compression.algorithm.gzip.GZipCompressor

createGZipInputStream, createGZipOutputStream, getPixel, setPixel

Methods inherited from class java.lang.Object

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

Constructor Details

GZip2Compressor

public GZip2Compressor(int primitiveSize)

Method Details

compress

public boolean compress(T pixelData,
 ByteBuffer compressed)

Description copied from interface: ICompressor

compress the buffer into the byte buffer. Attention enough space must already be allocated.

Specified by:

compress in interface ICompressor<T extends Buffer>

Overrides:

compress in class GZipCompressor<T extends Buffer>

Parameters:

pixelData - the buffer to compress.

compressed - the compressed data

Returns:

true if the compression succeeded.

decompress

public void decompress(ByteBuffer compressed,
 T pixelData)

Description copied from interface: ICompressor

Decompress the byte buffer and restore the buffer from it, again enough space must already be allocated.

Specified by:

decompress in interface ICompressor<T extends Buffer>

Overrides:

decompress in class GZipCompressor<T extends Buffer>

Parameters:

compressed - the compressed data

pixelData - the buffer to fill with the uncompressed data.

shuffle

public byte[] shuffle(byte[] byteArray)

unshuffle

public byte[] unshuffle(byte[] byteArray)