Book Image

JSF 1.2 Components

Book Image

JSF 1.2 Components


Overview of this book

Today's web developers need powerful tools to deliver richer, faster, and smoother web experiences. JavaServer Faces includes powerful, feature-rich, Ajax-enabled UI components that provide all the functionality needed to build web applications in a Web 2.0 world. It's the perfect way to build rich, interactive, and "Web 2.0-style" Java web apps. This book provides a comprehensive introduction to the most popular JSF components available today and demonstrate step-by-step how to build increasingly sophisticated JSF user interfaces with standard JSF, Facelets, Apache Tomahawk/Trinidad, ICEfaces, JBoss Seam, JBoss RichFaces/Ajax4jsf, and JSF 2.0 components. JSF 1.2 Components is both an excellent starting point for new JSF developers, and a great reference and “how to” guide for experienced JSF professionals. This book progresses logically from an introduction to standard JSF HTML, and JSF Core components to advanced JSF UI development. As you move through the book, you will learn how to build composite views using Facelets tags, implement common web development tasks using Tomahawk components, and add Ajax capabilities to your JSF user interface with ICEfaces components. You will also learn how to solve the complex web application development challenges with the JBoss Seam framework. At the end of the book, you will be introduced to the new and up-coming JSF component libraries that will provide a road map of the future JSF technologies.
Table of Contents (14 chapters)
JSF 1.2 Components
About the Author
About the Reviewers

Validating user input with the Seam framework

In many ways, the JSF validation framework follows the example of previous MVC frameworks, such as Struts. The Struts framework introduced an XML-based validation layer that enabled developers to declare validation rules in an XML file, which the framework would then apply to form bean properties during form submission. Struts includes a number of built-in validators to support common scenarios, such as checking for required fields, verifying a numeric value, and validating a credit card number format.

The JSF validation framework also includes a number of built-in validators that can be registered on components in the view, such as the<f:validateLongRange> and<f:validateLength> tags. It is important to note that JSF validators are not components themselves, but rather they are classes that implement the javax.faces.validator.Validator interface that are invoked during the conversion/validation phase of the JSF request processing...