org.apache.iotdb.tsfile.compress

Interface IUnCompressor

All Known Implementing Classes:

IUnCompressor.GZIPUnCompressor, IUnCompressor.LZ4UnCompressor, IUnCompressor.NoUnCompressor, IUnCompressor.SnappyUnCompressor

public interface IUnCompressor

uncompress data according to type in metadata.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	IUnCompressor.GZIPUnCompressor
static class	IUnCompressor.LZ4UnCompressor
static class	IUnCompressor.NoUnCompressor
static class	IUnCompressor.SnappyUnCompressor

Method Summary

Modifier and Type	Method and Description
CompressionType	getCodecName()
int	getUncompressedLength(byte[] array, int offset, int length)
int	getUncompressedLength(ByteBuffer buffer) get the uncompressed length.
static IUnCompressor	getUnCompressor(CompressionType name) get the UnCompressor based on the CompressionType.
byte[]	uncompress(byte[] byteArray) uncompress the byte array.
int	uncompress(byte[] byteArray, int offset, int length, byte[] output, int outOffset) uncompress the byte array.
int	uncompress(ByteBuffer compressed, ByteBuffer uncompressed) if the data is large, using this function is better.

Method Detail

getUnCompressor

static IUnCompressor getUnCompressor(CompressionType name)

get the UnCompressor based on the CompressionType.

Parameters:

name - CompressionType

Returns:

the UnCompressor of specified CompressionType

getUncompressedLength

int getUncompressedLength(byte[] array,
                          int offset,
                          int length)
                   throws IOException

Throws:

IOException

getUncompressedLength

int getUncompressedLength(ByteBuffer buffer)
                   throws IOException

get the uncompressed length.

Parameters:

buffer - MUST be DirectByteBuffer

Throws:

IOException

uncompress

byte[] uncompress(byte[] byteArray)
           throws IOException

uncompress the byte array.

Parameters:

byteArray - to be uncompressed bytes

Returns:

bytes after uncompressed

Throws:

IOException

uncompress

int uncompress(byte[] byteArray,
               int offset,
               int length,
               byte[] output,
               int outOffset)
        throws IOException

uncompress the byte array.

Parameters:

byteArray - -to be uncompressed bytes

offset - -offset

length - -length

output - -output byte

outOffset - -

Returns:

the valid length of the output array

Throws:

IOException

uncompress

int uncompress(ByteBuffer compressed,
               ByteBuffer uncompressed)
        throws IOException

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

Parameters:

compressed - MUST be DirectByteBuffer

uncompressed - MUST be DirectByteBuffer

Throws:

IOException

getCodecName

CompressionType getCodecName()