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Java Persistence with Hibernate
book

Java Persistence with Hibernate

by Gavin King, Christian Bauer
October 2006
Intermediate to advanced content levelIntermediate to advanced
880 pages
22h 11m
English
Manning Publications
Content preview from Java Persistence with Hibernate

1.2. The paradigm mismatch

The object/relational paradigm mismatch can be broken into several parts, which we'll examine one at a time. Let's start our exploration with a simple example that is problem free. As we build on it, you'll begin to see the mismatch appear.

Suppose you have to design and implement an online e-commerce application. In this application, you need a class to represent information about a user of the system, and another class to represent information about the user's billing details, as shown in figure 1.1.

In this diagram, you can see that a User has many BillingDetails. You can navigate the relationship between the classes in both directions. The classes representing these entities may be extremely simple:

 public class ...
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