Book Image

Apache MyFaces 1.2 Web Application Development

Book Image

Apache MyFaces 1.2 Web Application Development

Overview of this book

Hypes and trends (such as Web 2.0) cause a change in the requirements for user interfaces every now and then. While a lot of frameworks are capable of meeting those changing requirements, it often means you as a developer need in-depth knowledge of web standards, such as XHTML and JavaScript. A framework like Apache MyFaces that hides all details of how the page is rendered at the client and at the same time offers a rich set of tools and building blocks could save you a lot of time, not only when you're building a brand new application but also when you're adapting an existing application to meet new user interface requirements.This book will teach you everything you need to know to build appealing web interfaces with Apache MyFaces and maintain your code in a pragmatic way. It describes all the steps that are involved in building a user interface with Apache MyFaces. This includes building templates and composition components with Facelets, using all sorts of specialized components from the Tomahawk, Trinidad, and Tobago component sets and adding validation with MyFaces Extensions Validator.The book uses a step-by-step approach and contains a lot of tips based on experience of the MyFaces libraries in real-world projects. Throughout the book an example scenario is used to work towards a fully functional application when the book is finished.This step-by-step guide will help you to build a fully functional and powerful application.
Table of Contents (22 chapters)
Apache MyFaces 1.2
Credits
About the Author
Acknowledgement
About the Reviewers
Preface
Trinidad Tags
Trinidad Text Keys
Default JSF Error Messages
ExtVal Default Error Messages

Summary


This chapter introduced MyFaces Extensions Validator, or ExtVal for short. After the installation of ExtVal, we saw that no configuration is needed to get started, based on standard JPA annotations. After that, we had a look at the extra annotations that ExtVal adds to facilitate more validation options and to enable cross validation. We saw how we can combine ExtVal with custom JSF validators. We also looked into creating custom error messages. We saw how we can customize and extend ExtVal in various ways. And finally, this chapter showed us how we can integrate ExtVal with JSR 303 Bean Validation.

This chapter has covered only the basics of what is possible with ExtVal. As ExtVal provides a very extensible and flexible infrastructure, the possibilities are virtually endless. More information can be found on the weblog of Gerhard Petracek, the lead developer of ExtVal, at http://os890.blogspot.com/. Another resource of additional information is a series of articles about ExtVal on...