File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Object Relational Mapping and the fly likes Problem in Mapping Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Head First Android this week in the Android forum!
JavaRanch » Java Forums » Databases » Object Relational Mapping
Bookmark "Problem in Mapping" Watch "Problem in Mapping" New topic

Problem in Mapping

Anupam Dee
Ranch Hand

Joined: Oct 18, 2010
Posts: 42

I have a Customer Class and an Address class as follows

Now I want to have two customers with the same address

//Now when i try to retrieve the Customer Object and iterate over the list i am not getting the address for the second customer. I am getting null there.

These are my HBM files



I am new to hibernate mapping.. please help me...

And i am a bit confused about the mapping strategies in hibernate..please suggest a good link too.
Bill Gorder

Joined: Mar 07, 2010
Posts: 1682

The way you have your objects defined you are expecting to a customer to have one address and that address to belong to exactly one Customer. But the way you are attempting to use it you are saying that one address can have many customers. With the way you have it defined you must define 2 Addresses with their own unique persistent ids even if they are both "ABCStreet"

[How To Ask Questions][Read before you PM me]
Consider Paul's rocket mass heater.
subject: Problem in Mapping
jQuery in Action, 3rd edition