Book Image

Oracle ADF 11gR2 Development Beginner's Guide

By : Vinod Thatheri Krishnan
Book Image

Oracle ADF 11gR2 Development Beginner's Guide

By: Vinod Thatheri Krishnan

Overview of this book

Oracle ADF is an end-to-end framework which makes application development simple by providing infrastructure services as well as visual and declarative development right away. "Oracle ADF 11gR2 Development Beginner's Guide" guides any user with programming skills to be able to quickly learn the options and ways to develop rich Internet applications using ADF 11gR2. Containing all the skills that a new user has to use to build an application in ADF 11gR2, this book is designed in such a way so that it enhances the practical feel of developing applications in ADF 11gR2. Starting with the installation and configuration of Oracle ADF 11g RD we will then work through topics such as working with the Model Layer and Model Data followed by displaying and binding the data. Later we will look at Navigations and Flows within applications as well as their layout, look, and feel. "Oracle ADF 11g R2 Development Beginner's Guide" will conclude with us looking at the security and deployment of the applications which have been created.
Table of Contents (19 chapters)
Oracle ADF 11gR2 Development Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Pop Quiz Answers
Index

Groovy expression


ADF Business Components utilize Groovy expressions to support scripting. Groovy is an open source, Java-like scripting language that can be stored in an XML definition file. For instance, the attribute name for the employee name Ename can directly be used in a Groovy expression to represent the value of the Ename attribute.

Groovy follows the same JavaBeans way of accessing the methods of an entity object that is defined in the Java class. Following are some of the ways to call the method of entity objects in a Groovy expression:

Java method

Groovy expression

isEmployee()

employee

getEmployee()

employee

getEmpNo(int n)

source.emp(5)

checkEmployeeName()

source.checkEmployeeName()

checkEmployeeNo(int n)

source.checkEmployeeNo(5)

Setting a default value

We can set a default value for an attribute in the entity or view object by using the Groovy expression. The Default Value section for the attribute is provided with three options—Literal, Expression...