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JSF 1.2 Components

JSF 1.2 Components

By : IAN HLAVATS
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JSF 1.2 Components

JSF 1.2 Components

3 (2)
By: IAN HLAVATS

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)
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JSF 1.2 Components
Credits
Foreword
About the Author
About the Reviewers
Preface

Removing UI components and markup


Sometimes, it is desirable to remove certain elements from a JSF page during development without necessarily deleting the markup. As developers we are accustomed to "commenting out" code, but standard JSF does not provide a simple way for us to remove markup without deleting it.

We can always set the rendered attribute to false for UI components, but what if the rendered attribute is already specified based on some EL expression? We can use HTML comments, but any EL expressions in those comments will still be evaluated, possibly resulting in runtime errors.

Facelets provides a simple solution to this problem: the<ui:remove> tag. Any markup wrapped by the<ui:remove> tag will literally be removed from the UI component tree at request time. The following example shows the difference between a button component that is not rendered, and a button component that is removed. In the first attempt, we set the button's rendered attribute to false.

remove01...

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