Class OptimizedGZIPOutputStream

java.lang.Object

java.io.OutputStream

com.ning.compress.gzip.OptimizedGZIPOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class OptimizedGZIPOutputStream
extends OutputStream

Optimized variant of GZIPOutputStream that reuses underlying Deflater instance}.

Field Summary

Fields

Modifier and Type	Field	Description
protected CRC32	_crc
protected Deflater	_deflater
protected DeflaterOutputStream	_deflaterOut
protected final byte[]	_eightByteBuffer
protected final GZIPRecycler	_gzipRecycler
protected OutputStream	_rawOut	Underlying output stream that header, compressed content and footer go to
(package private) static final byte[]	DEFAULT_HEADER	For now, static header seems fine, since JDK default gzip writer does it too:
private static final int	GZIP_MAGIC	GZIP header magic number; written out LSB like most everything else (i.e.

Constructor Summary

Constructors

Constructor	Description
OptimizedGZIPOutputStream(OutputStream out)

Method Summary

Modifier and Type	Method	Description
private static final void	_putInt(byte[] buf, int offset, int value)	Stupid GZIP, writes stuff in wrong order (not network, but x86)
private void	_writeTrailer(OutputStream out)
void	close()
void	flush()
final void	write(byte[] buf)
void	write(byte[] buf, int off, int len)
final void	write(int c)

Methods inherited from class OutputStream

nullOutputStream

Methods inherited from class Object

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

Field Details

GZIP_MAGIC

private static final int GZIP_MAGIC

GZIP header magic number; written out LSB like most everything else (i.e. as 0x1f 0x8b)

See Also:

• Constant Field Values

DEFAULT_HEADER

static final byte[] DEFAULT_HEADER

For now, static header seems fine, since JDK default gzip writer does it too:

_deflater

protected Deflater _deflater

_gzipRecycler

protected final GZIPRecycler _gzipRecycler

_eightByteBuffer

protected final byte[] _eightByteBuffer

_rawOut

protected OutputStream _rawOut

Underlying output stream that header, compressed content and footer go to

_deflaterOut

protected DeflaterOutputStream _deflaterOut

_crc

protected CRC32 _crc

Constructor Details

OptimizedGZIPOutputStream

public OptimizedGZIPOutputStream(OutputStream out)
                          throws IOException

Throws:

IOException

Method Details

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException

write

public final void write(byte[] buf)
                 throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

write

public final void write(int c)
                 throws IOException

Specified by:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] buf,
 int off,
 int len)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

_writeTrailer

private void _writeTrailer(OutputStream out)
                    throws IOException

Throws:

IOException

_putInt

private static final void _putInt(byte[] buf,
 int offset,
 int value)

Stupid GZIP, writes stuff in wrong order (not network, but x86)