Is there a easy way to serialization a NULL tree

[bitraft]

I want to dump the all NULL value tree into a memory block, Is there an easy way to do it with out use Iterators ?

I also need to be able to recovery it, for example rebuild the tree from disk in one step(avoid Iterators insert).

This tree only accept NULL as value, so I guess there is a one step operate to do it.

Thanks in advance.