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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 – learning to override a method


The following steps will show how to override a method from the class and then write our own logic in the method. We will have EmpDirectoryModuleImpl as our example here:

  1. Right-click on the EmpDirectoryModuleImpl class and select the Source option.

  2. Click on the Override Methods… option to override the operations from the base class.

  3. Type in the method name, for example befo, in the search box that will fetch methods starting with that literal.

  4. Check the beforeCommit() operation and click on OK.

  5. Add the following code:

    ViewObject vo = findViewObject("EmpVO3");
    vo.clearCache();
    vo.executeQuery();
  6. This code has to be added before the super.beforeCommit(transactionEvent) code statement.

What just happened?

Before committing the transaction:

  • We are providing a handle to the EMPVO3 view object, which is the view instance of the child view object for DeptVO1

  • The second line clears the cache for the view object and the last line will execute the query.

Have...

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