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

Extra validators


Tomahawk adds some extra validators in addition to the standard JSF validators. We’ll have a quick look at these in the next sections.

Validating equality

The<t:validateEqual> component can be used to ensure that the values entered in two different fields are equal to each other. This is, of course, useful for a password change form that has a "new password" field and a "confirm new password" field. The usage is as follows:

<h:inputField id="newPassword" value="#{bean.newPassword}"/>
<h:inputField value="#{bean.newPasswordConfirm}">
<t:validateEqual for="newPassword" />
</h:inputField>

Note how the for attribute in the validator refers to the id of the first input field.

Validating e-mail addresses

To validate an e-mail address, a special<t:validateEmail> validator component is available. This uses the e-mail validation of the Apache Commons Validator library, which is rather strict. For example, the address has to end with a top-level domain...