org.apache.commons.compress.compressors.lz4

Class BlockLZ4CompressorInputStream

java.lang.Object

java.io.InputStream

org.apache.commons.compress.compressors.CompressorInputStream

org.apache.commons.compress.compressors.lz77support.AbstractLZ77CompressorInputStream

org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, InputStreamStatistics

public class BlockLZ4CompressorInputStream
extends AbstractLZ77CompressorInputStream

CompressorInputStream for the LZ4 block format.

Since:

1.14

See Also:

LZ4 Block Format Description

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	BlockLZ4CompressorInputStream.State

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static int	BACK_REFERENCE_SIZE_MASK
(package private) static int	LITERAL_SIZE_MASK
private int	nextBackReferenceSize Back-Reference-size part of the block starting byte.
(package private) static int	SIZE_BITS
private BlockLZ4CompressorInputStream.State	state Current state of the stream
(package private) static int	WINDOW_SIZE

Fields inherited from class org.apache.commons.compress.compressors.lz77support.AbstractLZ77CompressorInputStream

supplier

Constructor Summary

Constructors

Constructor and Description
BlockLZ4CompressorInputStream(java.io.InputStream is) Creates a new LZ4 input stream.

Method Summary

Modifier and Type	Method and Description
private boolean	initializeBackReference()
int	read(byte[] b, int off, int len)
private long	readSizeBytes()
private void	readSizes()

Methods inherited from class org.apache.commons.compress.compressors.lz77support.AbstractLZ77CompressorInputStream

available, close, getCompressedCount, getSize, hasMoreDataInBlock, prefill, read, readBackReference, readLiteral, readOneByte, startBackReference, startLiteral

Methods inherited from class org.apache.commons.compress.compressors.CompressorInputStream

count, count, getBytesRead, getCount, getUncompressedCount, pushedBackBytes

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.compress.utils.InputStreamStatistics

getUncompressedCount

Field Detail

WINDOW_SIZE

static final int WINDOW_SIZE

See Also:

Constant Field Values

SIZE_BITS

static final int SIZE_BITS

See Also:

Constant Field Values

BACK_REFERENCE_SIZE_MASK

static final int BACK_REFERENCE_SIZE_MASK

See Also:

Constant Field Values

LITERAL_SIZE_MASK

static final int LITERAL_SIZE_MASK

See Also:

Constant Field Values

nextBackReferenceSize

private int nextBackReferenceSize

Back-Reference-size part of the block starting byte.

state

private BlockLZ4CompressorInputStream.State state

Current state of the stream

Constructor Detail

BlockLZ4CompressorInputStream

public BlockLZ4CompressorInputStream(java.io.InputStream is)
                              throws java.io.IOException

Creates a new LZ4 input stream.

Parameters:

is - An InputStream to read compressed data from

Throws:

java.io.IOException - if reading fails

Method Detail

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

readSizes

private void readSizes()
                throws java.io.IOException

Throws:

java.io.IOException

readSizeBytes

private long readSizeBytes()
                    throws java.io.IOException

Throws:

java.io.IOException

initializeBackReference

private boolean initializeBackReference()
                                 throws java.io.IOException

Returns:

false if there is no more back-reference - this means this is the last block of the stream.

Throws:

java.io.IOException