Hi. I am tottaly new to Hibernate.
I need help with creating ORM.
I have red lots of documentations, still doubt i have right model.

I have 2 tables:

Class City
1) Table Cities:
CityID<------------one2many---------CityIDa/CityIDa
CityName
CityPolulation
DateAdded

Class Distance
2)Table Distances(between 2 cities)
DistanceID
CityIDa>--------------------many2one--------City.CityID
CityIDb>--------------------many2one--------City.CityID
DistanceKm

Idea was that there are table cities where we store information about cities and table distances where we will store distance in kilometers between cities.
This way i have a graph of cities, and i need to find shortest path from one city to another when user requests.
Anybody could help me with solving my noob problem?
Thnx a lot.

You'd probably be better off just having city as a class. Then creating an adjacancy matrix from all cities to calculate shortest paths. This is more efficient than creating a class for every city - city distance relationship.

Get a good textbook on Geographical Infomation Systems and research adjacancy matrices to get a better grip on the problem domain.

Well using Hibernate is a must.
For implementing busyness logic i will use Dijkstra algorythm, it is not that difficult to count shortest way.
But i don't know what OR maping to use.