Package net.jpountz.lz4

LZ4 compression.

See: Description

Interface Summary

Interface	Description
LZ4Decompressor	Deprecated Use LZ4FastDecompressor instead.
LZ4UnknownSizeDecompressor	Deprecated Use LZ4SafeDecompressor instead.

Class Summary

Class	Description
LZ4BlockInputStream	InputStream implementation to decode data written with LZ4BlockOutputStream.
LZ4BlockOutputStream	Streaming LZ4.
LZ4Compressor	LZ4 compressor.
LZ4Factory	Entry point for the LZ4 API.
LZ4FastDecompressor	LZ4 decompressor that requires the size of the original input to be known.
LZ4FrameInputStream	A partial implementation of the v1.5.1 LZ4 Frame format.
LZ4FrameOutputStream	A partial implementation of the v1.5.1 LZ4 Frame format.
LZ4FrameOutputStream.BD
LZ4FrameOutputStream.FLG
LZ4FrameOutputStream.FrameInfo
LZ4SafeDecompressor	LZ4 decompressor that requires the size of the compressed data to be known.

Enum Summary

Enum	Description
LZ4FrameOutputStream.BLOCKSIZE
LZ4FrameOutputStream.FLG.Bits

Exception Summary

Exception	Description
LZ4Exception	LZ4 compression or decompression error.

Package net.jpountz.lz4 Description

LZ4 compression. The entry point of the API is the LZ4Factory class, which gives access to compressors and decompressors.

Sample usage:

    LZ4Factory factory = LZ4Factory.fastestInstance();

    byte[] data = "12345345234572".getBytes("UTF-8");
    final int decompressedLength = data.length;

    // compress data
    LZ4Compressor compressor = factory.fastCompressor();
    int maxCompressedLength = compressor.maxCompressedLength(decompressedLength);
    byte[] compressed = new byte[maxCompressedLength];
    int compressedLength = compressor.compress(data, 0, decompressedLength, compressed, 0, maxCompressedLength);

    // decompress data
    // - method 1: when the decompressed length is known
    LZ4FastDecompressor decompressor = factory.fastDecompressor();
    byte[] restored = new byte[decompressedLength];
    int compressedLength2 = decompressor.decompress(compressed, 0, restored, 0, decompressedLength);
    // compressedLength == compressedLength2

    // - method 2: when the compressed length is known (a little slower)
    // the destination buffer needs to be over-sized
    LZ4SafeDecompressor decompressor2 = factory.safeDecompressor();
    int decompressedLength2 = decompressor2.decompress(compressed, 0, compressedLength, restored, 0);
    // decompressedLength == decompressedLength2