WorldData

public class WorldData extends WorldSavedData {

    private static final String IDENTITY = "PlacedBlocksData";

    public WorldData()
    {
        super(IDENTITY);
    }

    public static WorldData get(World world)
    {
        WorldData data = (WorldData) world.getPerWorldStorage().loadData(WorldData.class, IDENTITY);
        if(data == null)
        {
            data = new WorldData();
            world.getPerWorldStorage().setData(IDENTITY, data);
        }
        return data;
    }


    @Override
    public void writeToNBT(NBTTagCompound nbt)
    {
        NBTTagList chunkList = new NBTTagList();

        long data;// <--- Store all data within that

        /** Loops through each dimension */
        int numOfDimensions = ChunkBlockPos.dimensionToChunkPos.size();
        for(int dimensionID = 0; dimensionID < numOfDimensions; dimensionID++)
        {
            /** Loops through each chunk within said dimension */
            int numOfChunks = ChunkBlockPos.dimensionToChunkPos.get(dimensionID).size();
            for(int chunkID = 0; chunkID < numOfChunks; chunkID++)
            {
                //Store data about the chunk in left most bits of data
                data = (ChunkBlockPos.dimensionToChunkPos.get(dimensionID).get(chunkID).getTrueValue() << 16);
                /** Loops through each block within the chunk (Inside the hashmap)*/
                Iterator mapIter = ChunkBlockPos.dimensionToChunkPos.get(dimensionID).get(chunkID).subBlockPos.keySet().iterator();
                while(mapIter.hasNext())
                {
                    data |= ((ChunkBlockPos)mapIter.next()).blockPos & 0xFFFF;

                    NBTTagCompound blockData = new NBTTagCompound();
                    blockData.setLong("DATA", data);
                    chunkList.appendTag(blockData);
                }
            }
        }
        nbt.setTag(IDENTITY, chunkList);


    }

    @Override
    public void readFromNBT(NBTTagCompound nbt)
    {
        NBTTagList list = nbt.getTagList(IDENTITY, NBT.TAG_LIST);

        for(int i = 0; i < list.tagCount(); i++)
        {
            int[] data = getBlockInfoFromData(list.getCompoundTagAt(i).getLong("DATA"));

            //Create the chunkBlockPos
            ChunkBlockPos chunkBlockPos = new ChunkBlockPos(data[3],data[5],data[4]);

            //Create the chunkPos
            ChunkPos chunkPos = new ChunkPos(data[1], data[2], data[0]);

            //Add data to ram
            ChunkBlockPos.InsertEntry(chunkBlockPos, chunkPos);
        }
    }

    /**
     * @return [0]-Dimension [1]-ChunkX [2]-ChunkZ [3]-blockX [4]-BlockZ [5]-BlockY
     */
    public static final int[] getBlockInfoFromData(long data)
    {
        //Needs careful testing
        int dimesion = (int) ((data & 0xF000000000000000L) >>> 60);
        int chunkX = (int) ((data & 0xFFFFFC000000000L) >>> 38);
        int chunkZ = (int) ((data & 0x3FFFFF0000L) >>> 16);
        int blockX = (int) ((data & 0xF000) >>> 12);
        int blockZ = (int) ((data & 0xF00) >>> 8);
        int blockY = (int) ((data & 0xFF));

        return new int[]{dimesion, chunkX, chunkZ, blockX, blockZ, blockY};

    }
}