Compress-LZF 1.1.2 · com.ning.compress.gzip.OptimizedGZIPOutputStream

Field Summary

Modifier and Type	Field and 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
pack-priv 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. as 0x1f 0x8b)

Constructor Summary

Access	Constructor and Description
public	OptimizedGZIPOutputStream(OutputStream out)

Method Summary

Modifier and Type	Method and 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)
public void	close() Overrides java.io.OutputStream.close. Implements java.io.Closeable.close. Closes this output stream and releases any system resources associated with this stream.
public void	flush() Overrides java.io.OutputStream.flush. Implements java.io.Flushable.flush. Flushes this output stream and forces any buffered output bytes to be written out.
public final void	write(byte[] the data. buf) Overrides java.io.OutputStream.write. Writes `b.length` bytes from the specified byte array to this output stream.
public final void	write(int the `byte`. c) Implements abstract java.io.OutputStream.write. Writes the specified byte to this output stream.
public void	write(byte[] the data. buf, int the start offset in the data. off, int the number of bytes to write. len) Overrides java.io.OutputStream.write. Writes `len` bytes from the specified byte array starting at offset `off` to this output stream.

Inherited from java.io.OutputStream:: nullOutputStream

Field Detail

_crc	back to summary
protected CRC32 _crc

_deflater	back to summary
protected Deflater _deflater

_deflaterOut	back to summary
protected DeflaterOutputStream _deflaterOut

_eightByteBuffer	back to summary
protected final byte[] _eightByteBuffer

_gzipRecycler	back to summary
protected final GZIPRecycler _gzipRecycler

_rawOut	back to summary
protected OutputStream _rawOut Underlying output stream that header, compressed content and footer go to

DEFAULT_HEADER	back to summary
pack-priv static final byte[] DEFAULT_HEADER For now, static header seems fine, since JDK default gzip writer does it too:

GZIP_MAGIC	back to summary
private static final int GZIP_MAGIC GZIP header magic number; written out LSB like most everything else (i.e. as 0x1f 0x8b)

Constructor Detail

OptimizedGZIPOutputStream	back to summary
public OptimizedGZIPOutputStream(OutputStream out) throws IOException

Method Detail

_putInt	back to summary
private static final void _putInt(byte[] buf, int offset, int value) Stupid GZIP, writes stuff in wrong order (not network, but x86)

_writeTrailer	back to summary
private void _writeTrailer(OutputStream out) throws IOException

close back to summary

close	back to summary
public void close() throws IOException Overrides java.io.OutputStream.close. Implements java.io.Closeable.close. Doc from java.io.OutputStream.close. Closes this output stream and releases any system resources associated with this stream. The general contract of `close` is that it closes the output stream. A closed stream cannot perform output operations and cannot be reopened. Annotations @Override Exceptions IOException: if an I/O error occurs.

public void close() throws IOException

Overrides java.io.OutputStream.close.

Implements java.io.Closeable.close.

Doc from java.io.OutputStream.close.

Closes this output stream and releases any system resources associated with this stream. The general contract of close is that it closes the output stream. A closed stream cannot perform output operations and cannot be reopened.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

flush back to summary

flush	back to summary
public void flush() throws IOException Overrides java.io.OutputStream.flush. Implements java.io.Flushable.flush. Doc from java.io.OutputStream.flush. Flushes this output stream and forces any buffered output bytes to be written out. The general contract of `flush` is that calling it is an indication that, if any bytes previously written have been buffered by the implementation of the output stream, such bytes should immediately be written to their intended destination. If the intended destination of this stream is an abstraction provided by the underlying operating system, for example a file, then flushing the stream guarantees only that bytes previously written to the stream are passed to the operating system for writing; it does not guarantee that they are actually written to a physical device such as a disk drive. Annotations @Override Exceptions IOException: if an I/O error occurs.

public void flush() throws IOException

Overrides java.io.OutputStream.flush.

Implements java.io.Flushable.flush.

Doc from java.io.OutputStream.flush.

Flushes this output stream and forces any buffered output bytes to be written out. The general contract of flush is that calling it is an indication that, if any bytes previously written have been buffered by the implementation of the output stream, such bytes should immediately be written to their intended destination.

If the intended destination of this stream is an abstraction provided by the underlying operating system, for example a file, then flushing the stream guarantees only that bytes previously written to the stream are passed to the operating system for writing; it does not guarantee that they are actually written to a physical device such as a disk drive.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

write back to summary

write	back to summary
public final void write(byte[] buf) throws IOException Overrides java.io.OutputStream.write. Doc from java.io.OutputStream.write. Writes `b.length` bytes from the specified byte array to this output stream. The general contract for `write(b)` is that it should have exactly the same effect as the call `write(b, 0, b.length)`. Parameters buf:byte[] the data. Annotations @Override Exceptions IOException: if an I/O error occurs.

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

Overrides java.io.OutputStream.write.

Doc from java.io.OutputStream.write.

Writes b.length bytes from the specified byte array to this output stream. The general contract for write(b) is that it should have exactly the same effect as the call write(b, 0, b.length).

Parameters

buf:byte[]: the data.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

write back to summary

write	back to summary
public final void write(int c) throws IOException Implements abstract java.io.OutputStream.write. Doc from java.io.OutputStream.write. Writes the specified byte to this output stream. The general contract for `write` is that one byte is written to the output stream. The byte to be written is the eight low-order bits of the argument `b`. The 24 high-order bits of `b` are ignored. Parameters c:int the `byte`. Annotations @Override Exceptions IOException: if an I/O error occurs. In particular, an `IOException` may be thrown if the output stream has been closed.

public final void write(int c) throws IOException

Implements abstract java.io.OutputStream.write.

Doc from java.io.OutputStream.write.

Writes the specified byte to this output stream. The general contract for write is that one byte is written to the output stream. The byte to be written is the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Parameters

c:int: the byte.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

write back to summary

write	back to summary
public void write(byte[] buf, int off, int len) throws IOException Overrides java.io.OutputStream.write. Doc from java.io.OutputStream.write. Writes `len` bytes from the specified byte array starting at offset `off` to this output stream. The general contract for `write(b, off, len)` is that some of the bytes in the array `b` are written to the output stream in order; element `b[off]` is the first byte written and `b[off+len-1]` is the last byte written by this operation. If `b` is `null`, a `NullPointerException` is thrown. If `off` is negative, or `len` is negative, or `off+len` is greater than the length of the array `b`, then an `IndexOutOfBoundsException` is thrown. Parameters buf:byte[] the data. off:int the start offset in the data. len:int the number of bytes to write. Annotations @Override Exceptions IOException: if an I/O error occurs. In particular, an `IOException` is thrown if the output stream is closed.

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

Overrides java.io.OutputStream.write.

Doc from java.io.OutputStream.write.

Writes len bytes from the specified byte array starting at offset off to this output stream. The general contract for write(b, off, len) is that some of the bytes in the array b are written to the output stream in order; element b[off] is the first byte written and b[off+len-1] is the last byte written by this operation.

If b is null, a NullPointerException is thrown.

If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown.

Parameters

buf:byte[]: the data.
off:int: the start offset in the data.
len:int: the number of bytes to write.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs. In particular, an IOException is thrown if the output stream is closed.

public Class OptimizedGZIPOutputStream

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