com.ning.compress.gzip

Class OptimizedGZIPOutputStream

java.lang.Object

java.io.OutputStream

com.ning.compress.gzip.OptimizedGZIPOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class OptimizedGZIPOutputStream
extends java.io.OutputStream

Optimized variant of GZIPOutputStream that reuses underlying Deflater instance}.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
OptimizedGZIPOutputStream(java.io.OutputStream out)

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

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 java.util.zip.Deflater _deflater

_gzipRecycler

protected final GZIPRecycler _gzipRecycler

_eightByteBuffer

protected final byte[] _eightByteBuffer

_rawOut

protected java.io.OutputStream _rawOut

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

_deflaterOut

protected java.util.zip.DeflaterOutputStream _deflaterOut

_crc

protected java.util.zip.CRC32 _crc

Constructor Detail

OptimizedGZIPOutputStream

public OptimizedGZIPOutputStream(java.io.OutputStream out)
                          throws java.io.IOException

Throws:

java.io.IOException

Method Detail

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException

flush

public void flush()
           throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.OutputStream

Throws:

java.io.IOException

write

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

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

write

public final void write(int c)
                 throws java.io.IOException

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException

write

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

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

_writeTrailer

private void _writeTrailer(java.io.OutputStream out)
                    throws java.io.IOException

Throws:

java.io.IOException

_putInt

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

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