org.apache.parquet.hadoop.codec

Class Lz4RawCompressor

java.lang.Object

org.apache.parquet.hadoop.codec.NonBlockedCompressor

org.apache.parquet.hadoop.codec.Lz4RawCompressor

All Implemented Interfaces:

org.apache.hadoop.io.compress.Compressor

public class Lz4RawCompressor
extends NonBlockedCompressor

Constructor Summary

Constructors

Constructor and Description
Lz4RawCompressor()

Method Summary

Modifier and Type	Method and Description
protected int	compress(ByteBuffer uncompressed, ByteBuffer compressed) Compress the content in the given input buffer.
protected int	maxCompressedLength(int byteSize) Get the maximum byte size needed for compressing data of the given byte size.

Methods inherited from class org.apache.parquet.hadoop.codec.NonBlockedCompressor

compress, end, finish, finished, getBytesRead, getBytesWritten, needsInput, reinit, reset, setDictionary, setInput

Methods inherited from class java.lang.Object

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

Constructor Detail

Lz4RawCompressor

public Lz4RawCompressor()

Method Detail

maxCompressedLength

protected int maxCompressedLength(int byteSize)

Description copied from class: NonBlockedCompressor

Get the maximum byte size needed for compressing data of the given byte size.

Specified by:

maxCompressedLength in class NonBlockedCompressor

Parameters:

byteSize - byte size of the data to compress

Returns:

maximum byte size of the compressed data

compress

protected int compress(ByteBuffer uncompressed,
                       ByteBuffer compressed)
                throws IOException

Description copied from class: NonBlockedCompressor

Compress the content in the given input buffer. After the compression, you can retrieve the compressed data from the output buffer [pos() ... limit()) (compressed data size = limit() - pos() = remaining())

Specified by:

compress in class NonBlockedCompressor

Parameters:

uncompressed - buffer[pos() ... limit()) containing the input data

compressed - output of the compressed data. Uses range [pos()..].

Returns:

byte size of the compressed data.

Throws:

IOException