Package org.apache.iotdb.tsfile.compress

Class IUnCompressor.LZ4UnCompressor

java.lang.Object

org.apache.iotdb.tsfile.compress.IUnCompressor.LZ4UnCompressor

All Implemented Interfaces:

IUnCompressor

Enclosing interface:

IUnCompressor

public static class IUnCompressor.LZ4UnCompressor
extends java.lang.Object
implements IUnCompressor

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.iotdb.tsfile.compress.IUnCompressor

IUnCompressor.GZIPUnCompressor, IUnCompressor.LZ4UnCompressor, IUnCompressor.LZMA2UnCompressor, IUnCompressor.NoUnCompressor, IUnCompressor.SnappyUnCompressor, IUnCompressor.ZstdUnCompressor

Constructor Summary

Constructors

Constructor	Description
LZ4UnCompressor()

Method Summary

Modifier and Type	Method	Description
CompressionType	getCodecName()
int	getUncompressedLength(byte[] array, int offset, int length)
int	getUncompressedLength(java.nio.ByteBuffer buffer)	get the uncompressed length.
byte[]	uncompress(byte[] bytes)	We don't recommend using this method because we have to allocate MAX_COMPRESS_RATIO * compressedSize to ensure uncompress safety, you can use other method if you know the uncompressed size
int	uncompress(byte[] byteArray, int offset, int length, byte[] output, int outOffset)	uncompress the byte array.
int	uncompress(java.nio.ByteBuffer compressed, java.nio.ByteBuffer uncompressed)	if the data is large, using this function is better.

Methods inherited from class java.lang.Object

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

Constructor Detail

LZ4UnCompressor

public LZ4UnCompressor()

Method Detail

getUncompressedLength

public int getUncompressedLength(byte[] array,
                                 int offset,
                                 int length)

Specified by:

getUncompressedLength in interface IUnCompressor

getUncompressedLength

public int getUncompressedLength(java.nio.ByteBuffer buffer)

Description copied from interface: IUnCompressor

get the uncompressed length.

Specified by:

getUncompressedLength in interface IUnCompressor

Parameters:

buffer - MUST be DirectByteBuffer

uncompress

public byte[] uncompress(byte[] bytes)
                  throws java.io.IOException

We don't recommend using this method because we have to allocate MAX_COMPRESS_RATIO * compressedSize to ensure uncompress safety, you can use other method if you know the uncompressed size

Specified by:

uncompress in interface IUnCompressor

Parameters:

bytes - to be uncompressed bytes

Returns:

bytes after uncompressed

Throws:

java.io.IOException

uncompress

public int uncompress(byte[] byteArray,
                      int offset,
                      int length,
                      byte[] output,
                      int outOffset)
               throws java.io.IOException

Description copied from interface: IUnCompressor

uncompress the byte array.

Specified by:

uncompress in interface IUnCompressor

Parameters:

byteArray - -to be uncompressed bytes

offset - -offset

length - -length

output - -output byte

outOffset - -

Returns:

the valid length of the output array

Throws:

java.io.IOException

uncompress

public int uncompress(java.nio.ByteBuffer compressed,
                      java.nio.ByteBuffer uncompressed)
               throws java.io.IOException

Description copied from interface: IUnCompressor

if the data is large, using this function is better.

Specified by:

uncompress in interface IUnCompressor

Parameters:

compressed - MUST be DirectByteBuffer

uncompressed - MUST be DirectByteBuffer

Throws:

java.io.IOException

getCodecName

public CompressionType getCodecName()

Specified by:

getCodecName in interface IUnCompressor