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

Data visualization


Trinidad has a data visualization component that is able to visualize numerical data in an appealing way. This component relies on a special data model that we have to implement. This section focuses on implementing that data model, and also gives an overview of the most important options of the visualization component itself.

Creating the data model

The chart component expects a number of methods to be present in order to get the data to be visualized. One would expect these methods to be defined in a Java interface, as is common practice. However, the Trinidad project only supplies an abstract class that has to be extended, which is the org.apache.myfaces.trinidad.model.ChartModel class. This class defines three methods that have to be implemented regardless of which visualization type will be chosen. Apart from these three methods, the class has a number of methods that are not abstract, but that can be overridden in a subclass. Some of them are needed for some specific...