Examples with LevelDB cn.nukkit.level.format.leveldb.LevelDB used on opensource projects

Example 1 with LevelDB

use of cn.nukkit.level.format.leveldb.LevelDB in project Nukkit by Nukkit.

the class LevelProviderConverter method perform.

LevelProvider perform() throws IOException {
    new File(path).mkdir();
    File dat = new File(provider.getPath(), "level.dat.old");
    new File(provider.getPath(), "level.dat").renameTo(dat);
    Utils.copyFile(dat, new File(path, "level.dat"));
    LevelProvider result;
    try {
        if (provider instanceof LevelDB) {
            try (FileInputStream stream = new FileInputStream(path + "level.dat")) {
                stream.skip(8);
                CompoundTag levelData = NBTIO.read(stream, ByteOrder.LITTLE_ENDIAN);
                if (levelData != null) {
                    NBTIO.writeGZIPCompressed(new CompoundTag().putCompound("Data", levelData), new FileOutputStream(path + "level.dat"));
                } else {
                    throw new IOException("LevelData can not be null");
                }
            } catch (IOException e) {
                throw new LevelException("Invalid level.dat");
            }
        }
        result = toClass.getConstructor(Level.class, String.class).newInstance(level, path);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    if (toClass == Anvil.class) {
        if (provider instanceof McRegion) {
            new File(path, "region").mkdir();
            for (File file : new File(provider.getPath() + "region/").listFiles()) {
                Matcher m = Pattern.compile("-?\\d+").matcher(file.getName());
                int regionX, regionZ;
                try {
                    if (m.find()) {
                        regionX = Integer.parseInt(m.group());
                    } else
                        continue;
                    if (m.find()) {
                        regionZ = Integer.parseInt(m.group());
                    } else
                        continue;
                } catch (NumberFormatException e) {
                    continue;
                }
                RegionLoader region = new RegionLoader(provider, regionX, regionZ);
                for (Integer index : region.getLocationIndexes()) {
                    int chunkX = index & 0x1f;
                    int chunkZ = index >> 5;
                    BaseFullChunk old = region.readChunk(chunkX, chunkZ);
                    if (old == null)
                        continue;
                    int x = (regionX << 5) | chunkX;
                    int z = (regionZ << 5) | chunkZ;
                    FullChunk chunk = new ChunkConverter(result).from(old).to(Chunk.class).perform();
                    result.saveChunk(x, z, chunk);
                }
                region.close();
            }
        }
        if (provider instanceof LevelDB) {
            new File(path, "region").mkdir();
            for (byte[] key : ((LevelDB) provider).getTerrainKeys()) {
                int x = getChunkX(key);
                int z = getChunkZ(key);
                BaseFullChunk old = ((LevelDB) provider).readChunk(x, z);
                FullChunk chunk = new ChunkConverter(result).from(old).to(Chunk.class).perform();
                result.saveChunk(x, z, chunk);
            }
        }
        result.doGarbageCollection();
    }
    return result;
}