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Oracle ADF 11gR2 Development Beginner's Guide

You're reading from   Oracle ADF 11gR2 Development Beginner's Guide Oracle ADF is one of the easiest ways to develop rich internet applications. All you need is a little Java to get the most from this book as it takes you step-by-step from installation, to development, to implementation.

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Product type Paperback
Published in Apr 2013
Publisher Packt
ISBN-13 9781849689007
Length 330 pages
Edition 1st Edition
Languages
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Author (1):
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Vinod Thatheri Krishnan Vinod Thatheri Krishnan
Author Profile Icon Vinod Thatheri Krishnan
Vinod Thatheri Krishnan
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Table of Contents (19) Chapters Close

Oracle ADF 11gR2 Development Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Pop Quiz Answers
1. Installing and Configuring JDeveloper IDE FREE CHAPTER 2. Getting Started with ADF 3. Understanding the Model Layer 4. Validating and Using the Model Data 5. Binding the Data 6. Displaying the Data 7. Working with Navigation Flows 8. Layout with Look and Feel 9. Implementing Security 10. Deploying the ADF Application 11. Advanced Features of ADF Index

Time for action – adding a script expression


Let us work on the Script expression validator for the Job attribute to understand the full advantages of Groovy expressions. Follow these steps:

  1. Select the Job attribute in the EmpEO entity object from the Attributes list.

  2. Click on the + icon to add a new validator.

  3. Select the Script Expression validator for the Rule Type option. This will open an Expression editor section to write the script.

  4. Enter the following code in this editor section:

    String value = newValue; 
    String trim = value.trim(); 
    if(trim.equals('MANAGER')){ 
    adf.error.warn('NO_VACANCY'); 
    return false;
    }
    return true;
  5. You can click on the Text Syntax button to check if the syntax is correct.

  6. Click on the OK button to add the script expression.

What just happened?

We have added a script validation for the Job attribute. The script is written to do the following:

  1. Assign the current value to the variable called value.

  2. The trimmed value is saved in a variable called trim.

  3. We are checking if...

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