World save algorithm

public static NBTTagCompound saveWorldRegionToNBT(World world, BlockPOS pos1,
            BlockPOS pos2) {
        NBTTagCompound compound = new NBTTagCompound();
        if(pos1.x>pos2.x){
            int temp1=pos1.x;
            int temp2=pos2.x;
            pos2.x=temp1;
            pos1.x=temp2;
        }
        if(pos1.y>pos2.y){
            int temp1=pos1.y;
            int temp2=pos2.y;
            pos2.y=temp1;
            pos1.y=temp2;
        }
        if(pos1.z>pos2.z){
            int temp1=pos1.z;
            int temp2=pos2.z;
            pos2.z=temp1;
            pos1.z=temp2;
        }
        int height = pos1.y - pos2.y;
        int width = pos1.x - pos2.x;
        int depth = pos1.z - pos2.z;
        for (int y = pos1.y; y < height + 1; y++) {
            for (int x = 0; x < width + 1; x++) {
                for (int z = 0; z < depth + 1; z++) {
                    int relativeX=pos1.x-x;
                    int relativeZ=pos1.z-z;
                    int relativeY=pos1.y-y;
                    Block currentBlock = world.getBlock(x, y, z);
                    NBTTagCompound currentBlockCompound = new NBTTagCompound();
                    NBTTagCompound tileEntityCompound=new NBTTagCompound();
                    String currentBlockName = (String) Block.blockRegistry
                            .getNameForObject(currentBlock);

                    Integer metadata = world.getBlockMetadata(x, y, z);
                    System.out.println("processing block at:" +new BlockPOS(x, y, z)+"relative condinates:"+new BlockPOS(relativeX, relativeY, relativeZ)+"Block type:"+currentBlockName+"matedata:"+metadata);
                    currentBlockCompound.setBoolean("hasTileEntity", currentBlock.hasTileEntity(metadata));
                    currentBlockCompound.setString("blockid", currentBlockName);
                    currentBlockCompound.setInteger("metadata", metadata);
                    String name = String.format("Block|%x|%y|%z", relativeX, relativeY, relativeZ);
                    if(currentBlock.hasTileEntity(metadata)){
                        world.getTileEntity(z, y, z).writeToNBT(tileEntityCompound);
                    }
                    currentBlockCompound.setTag("tileEntityTag", tileEntityCompound);
                    compound.setTag(name, currentBlockCompound);
                }
            }
        }

        return compound;
    }