I wonder if or not hibernate can solve the following problem( with advanced performance)
I want to implement an application as follows:
Modelling:
people are the entity.
relationship(friend,classmate...) are the links between people
distance (between two person): 1 direct friend, 2 friend's friend,3 friend's friend's friend, 4 ..., 5 others
use case:
the system can be used to search a bunch of persons by specifying the critera and ordered by the distance.


pure relational database is not applicable for this kind of impementation for the performance requirement.

if neither is hibernate, what database is applicable for this kind of implementation. OODB?

thx in advanced