Book Image

Developing Web Applications with Oracle ADF Essentials

Book Image

Developing Web Applications with Oracle ADF Essentials

Overview of this book

With ADF, Oracle gives you the chance to use the powerful tool used by Oracle's own developers. Modern enterprise applications must be user-friendly, visually attractive, and fast performing. Oracle Fusion Applications are just that; but to get the desired output you need proven methods to use this powerful and flexible tool to achieve success in developing your enterprise applications. "Developing Web Applications with Oracle ADF Essentials" explains all you need to know in order to build good-looking, user-friendly applications on a completely free technology stack. It explains the highly productive, declarative development approach that will literally have your application running within a few hours, as well as how to use Java to add business logic. "Developing Web Applications with Oracle ADF Essentials" tells you how to develop and deploy web application applications based on the highly productive and free Oracle ADF Essentials framework. You will first learn how to build business services on top of database tables, and then how to easily build a web application using these services. You will see how to visually design the flow through your application with ADF task flows, and how to use Java programming to implement business logic. Using this book, you can start building and deploying advanced web applications on a robust, free platform quickly. Towards the end, you will be ready to build real-world ADF Essentials applications and will be able to consider yourself an ADF Essentials journeyman.
Table of Contents (16 chapters)
Developing Web Applications with Oracle ADF Essentials
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Index

Building your own foundation


The ability to create your own Java implementation classes is a powerful feature, but it can be made even more powerful by inserting an extra layer in the object hierarchy.

If you generate Java as described previously, every one of your Java classes is wired directly to one of Oracle's classes. This is not a good idea –– in case you decide that you want some new feature built into every entity implementation class, you would have to change each of the individual classes (FilmImpl, RentalImpl, and so on).

Fortunately, there is a better way: you can create your own framework extension classes. These are sets of classes that extend the Oracle-supplied classes and sit between your specific implementation class and the Oracle-supplied class. For example, you can create your own com.company.adf.framework.EntityImpl class that extends the Oracle-supplied class (oracle.jbo.server.EntityImpl), and then let your specific implementation classes (for example, FilmImpl) extend...