org.apache.flink.runtime.io.compression

Interface BlockDecompressor

All Known Implementing Classes:

AirBlockDecompressor, Lz4BlockDecompressor

public interface BlockDecompressor

A decompressor which decompresses a block each time.

Method Summary

Modifier and Type	Method and Description
int	decompress(byte[] src, int srcOff, int srcLen, byte[] dst, int dstOff) Decompress source data read from src and write the decompressed data to dst.
int	decompress(ByteBuffer src, int srcOff, int srcLen, ByteBuffer dst, int dstOff) Decompress source data read from (Buffer.position() + srcOff), and write the decompressed data to dst.

Method Detail

decompress

int decompress(ByteBuffer src,
               int srcOff,
               int srcLen,
               ByteBuffer dst,
               int dstOff)
        throws BufferDecompressionException

Decompress source data read from (Buffer.position() + srcOff), and write the decompressed data to dst.

Parameters:

src - Compressed data to read from

srcOff - The start offset of compressed data

srcLen - The length of data which want to be decompressed

dst - The target to write decompressed data

dstOff - The start offset to write the decompressed data

Returns:

Length of decompressed data

Throws:

BufferDecompressionException - if exception thrown when decompressing

decompress

int decompress(byte[] src,
               int srcOff,
               int srcLen,
               byte[] dst,
               int dstOff)
        throws BufferDecompressionException

Decompress source data read from src and write the decompressed data to dst.

Parameters:

src - Compressed data to read from

srcOff - The start offset of compressed data

srcLen - The length of data which want to be decompressed

dst - The target to write decompressed data

dstOff - The start offset to write the decompressed data

Returns:

Length of decompressed data

Throws:

BufferDecompressionException - if exception thrown when decompressing