gistfile1.txt

public boolean canBlockStay(World worldIn, BlockPos pos)
    {
        for (EnumFacing enumfacing : EnumFacing.Plane.HORIZONTAL)
        {
            Material material = worldIn.getBlockState(pos.offset(enumfacing)).getMaterial();

            if (material.isSolid() || material == Material.LAVA)
            {
                return false;
            }
        }

        Block block = worldIn.getBlockState(pos.down()).getBlock();
        return block == Blocks.CACTUS || block == Blocks.SAND && !worldIn.getBlockState(pos.up()).getMaterial().isLiquid();
    }