Like it or not, data is an integral part of any application, even cool object-oriented ones. Everything stops at the persistence layer, where Java developers traditionally have had to write complex ...

The Perst open-source project is available as a free download, though a licence must be purchased for commercial or closed-source products. The object-oriented database comes in Java and C# versions.

When object-oriented programming languages began to be used in enterprise applications, designers had problems fitting the object-oriented model with the relational model. In the object-oriented model ...

Note: This excerpt is taken from Chapter 4 of POJOs in Action, from Manning Publications. Every six months, Anne-Marie, who is my dental hygienist, gives me the same lecture on the importance of ...