bundles/org.simantics.lz4/src/org/simantics/lz4/Main.java

   1 package org.simantics.lz4;
   2
   3 import java.io.UnsupportedEncodingException;
   4
   5 import net.jpountz.lz4.LZ4Compressor;
   6 import net.jpountz.lz4.LZ4Factory;
   7 import net.jpountz.lz4.LZ4FastDecompressor;
   8 import net.jpountz.lz4.LZ4SafeDecompressor;
   9
  10 public class Main {
  11
  12         public static void main(String[] args) throws UnsupportedEncodingException {
  13                 LZ4Factory factory = LZ4Factory.fastestInstance();
  14
  15                 byte[] data = "12345345234572".getBytes("UTF-8");
  16                 final int decompressedLength = data.length;
  17
  18                 // compress data
  19                 LZ4Compressor compressor = factory.fastCompressor();
  20                 int maxCompressedLength = compressor.maxCompressedLength(decompressedLength);
  21                 byte[] compressed = new byte[maxCompressedLength];
  22                 int compressedLength = compressor.compress(data, 0, decompressedLength, compressed, 0, maxCompressedLength);
  23
  24                 // decompress data
  25                 // - method 1: when the decompressed length is known
  26                 LZ4FastDecompressor decompressor = factory.fastDecompressor();
  27                 byte[] restored = new byte[decompressedLength];
  28                 int compressedLength2 = decompressor.decompress(compressed, 0, restored, 0, decompressedLength);
  29                 System.out.println(compressedLength == compressedLength2);
  30
  31                 // - method 2: when the compressed length is known (a little slower)
  32                 // the destination buffer needs to be over-sized
  33                 LZ4SafeDecompressor decompressor2 = factory.safeDecompressor();
  34                 int decompressedLength2 = decompressor2.decompress(compressed, 0, compressedLength, restored, 0);
  35                 System.out.println(decompressedLength == decompressedLength2);
  36         }
  37
  38 }