org.apache.parquet.hadoop.codec

Class Lz4RawDecompressor

java.lang.Object

org.apache.parquet.hadoop.codec.NonBlockedDecompressor

org.apache.parquet.hadoop.codec.Lz4RawDecompressor

All Implemented Interfaces:

org.apache.hadoop.io.compress.Decompressor, org.apache.hadoop.io.compress.DirectDecompressor

public class Lz4RawDecompressor
extends NonBlockedDecompressor
implements org.apache.hadoop.io.compress.DirectDecompressor

Constructor Summary

Constructors

Constructor and Description
Lz4RawDecompressor()

Method Summary

Modifier and Type	Method and Description
void	decompress(ByteBuffer compressed, ByteBuffer uncompressed)
protected int	maxUncompressedLength(ByteBuffer compressed, int maxUncompressedLength) Get the maximum uncompressed byte size of the given compressed input.
protected int	uncompress(ByteBuffer compressed, ByteBuffer uncompressed) Uncompress the content in the input buffer.

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

decompress, end, finished, getRemaining, needsDictionary, needsInput, reset, setDictionary, setInput

Methods inherited from class java.lang.Object

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

Constructor Detail

Lz4RawDecompressor

public Lz4RawDecompressor()

Method Detail

maxUncompressedLength

protected int maxUncompressedLength(ByteBuffer compressed,
                                    int maxUncompressedLength)
                             throws IOException

Description copied from class: NonBlockedDecompressor

Get the maximum uncompressed byte size of the given compressed input. This operation takes O(1) time.

Specified by:

maxUncompressedLength in class NonBlockedDecompressor

Parameters:

compressed - input data [pos() ... limit())

maxUncompressedLength - maximum length of the uncompressed data

Returns:

uncompressed byte length of the given input

Throws:

IOException

uncompress

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

Description copied from class: NonBlockedDecompressor

Uncompress the content in the input buffer. The result is dumped to the specified output buffer.

Specified by:

uncompress in class NonBlockedDecompressor

Parameters:

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

uncompressed - output of the the uncompressed data. It uses buffer[pos()..]

Returns:

uncompressed data size

Throws:

IOException

decompress

public void decompress(ByteBuffer compressed,
                       ByteBuffer uncompressed)
                throws IOException

Specified by:

decompress in interface org.apache.hadoop.io.compress.DirectDecompressor

Throws:

IOException