Package com.github.luben.zstd

Class BaseZstdBufferDecompressingStreamNoFinalizer

java.lang.Object

com.github.luben.zstd.BaseZstdBufferDecompressingStreamNoFinalizer

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

ZstdBufferDecompressingStreamNoFinalizer, ZstdDirectBufferDecompressingStreamNoFinalizer

public abstract class BaseZstdBufferDecompressingStreamNoFinalizer
extends Object
implements Closeable

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	closed
protected ByteBuffer	source
protected long	stream

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	hasRemaining()
abstract int	read(ByteBuffer target)	Reads the content of the de-compressed stream into the target buffer.
protected ByteBuffer	refill(ByteBuffer toRefill)	Override this method in case the byte buffer passed to the constructor might not contain the full compressed stream
BaseZstdBufferDecompressingStreamNoFinalizer	setDict(byte[] dict)
BaseZstdBufferDecompressingStreamNoFinalizer	setDict(ZstdDictDecompress dict)
BaseZstdBufferDecompressingStreamNoFinalizer	setLongMax(int windowLogMax)	Set the value of zstd parameter ZSTD_d_windowLogMax.

Methods inherited from class java.lang.Object

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

Field Details

stream

protected long stream

source

protected ByteBuffer source

closed

protected boolean closed

Method Details

refill

protected ByteBuffer refill(ByteBuffer toRefill)

Override this method in case the byte buffer passed to the constructor might not contain the full compressed stream

Parameters:

toRefill - current buffer

Returns:

either the current buffer (but refilled and flipped if there was new content) or a new buffer.

hasRemaining

public boolean hasRemaining()

Returns:

false if all data is processed and no more data is available from the source

setDict

public BaseZstdBufferDecompressingStreamNoFinalizer setDict(byte[] dict)
                                                     throws IOException

Throws:

IOException

setDict

public BaseZstdBufferDecompressingStreamNoFinalizer setDict(ZstdDictDecompress dict)
                                                     throws IOException

Throws:

IOException

setLongMax

public BaseZstdBufferDecompressingStreamNoFinalizer setLongMax(int windowLogMax)
                                                        throws IOException

Set the value of zstd parameter ZSTD_d_windowLogMax.

Parameters:

windowLogMax - window size in bytes

Returns:

this instance of BaseZstdBufferDecompressingStreamNoFinalizer

Throws:

ZstdIOException - if there is an error while setting the configuration natively.

IOException

See Also:

• Zstd's ZSTD_d_windowLogMax parameter

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

read

public abstract int read(ByteBuffer target)
                  throws IOException

Reads the content of the de-compressed stream into the target buffer.

This method will block until the chunk of compressed data stored in source has been decompressed and written into the target buffer. After each execution, this method will refill the source buffer, using refill(ByteBuffer).

To read the full stream of decompressed data, this method should be called in a loop while hasRemaining() is true.

The target buffer will be written starting from Buffer.position(). The Buffer.position() of source and the target buffers will be modified to represent the data read and written respectively.

Parameters:

target - buffer to store the read bytes from uncompressed stream.

Returns:

the number of bytes read into the target buffer.

Throws:

ZstdIOException - if an error occurs while reading.

IllegalArgumentException - if provided source or target buffers are incorrectly configured.

IOException - if the stream is closed before reading.