Java & XML Data Binding

Chapter 3. Generating Classes

Now that we’re through the formalities, I want to focus specifically on the JAXB data binding framework. In this chapter, I start by discussing how to take a set of XML constraints and convert those constraints to a set of Java source files. In addition to seeing how this work with JAXB, this chapter should give you a solid idea of how class generation works so that when we move to other frameworks (in the second half of this book), you’ll already have a handle on class generation and how it works. I also briefly touch on the future of JAXB—specifically, which constraint models are supported and which should be supported in future versions.

Tip

Without belaboring the point, I want to be clear that this and other JAXB chapters were written using a prerelease version of Sun’s JAXB framework (the 1.0 version was not yet available). Because of this, small inconsistencies may creep in as this book goes to press. If you run across a problem with the examples, consult the JAXB documentation and feel free to contact us. Details of who to send mail to are in the preface of the book, and you can also check the book’s web site at http://www.newInstance.com.

Process Flow

First, let’s run through the process flow involved with generating constraints. This will help you get an idea of where we’re going and how the pieces in this chapter fit together. It should also form a simple mental checklist for you to follow when generating classes; if you skip a step, problems ...