In Part 2 of this EJB 3.0 learning series, you learn how to develop data models using POJOs (plain-old Java objects), and how to transparently map those object data models to and from relational ...

You're better off to follow the model of the CustomerAddress property in my sample DTO which holds a whole Address object rather than having individual street, city, etc. fields. Rather than having ...

Object databases are also suited for applications that are not necessarily based on an object model, but use a large number of in-memory indexes that are difficult to store in a relational database.