Overriding IsAttributeUpdateable Method for Conditional Rendering

While working on customer side during last week, we got a requirement to render table records and conditionally prevent editing based on history column. Its quite common requirement, and there are many ways in ADF to implement it. You can generate separate button for each row and conditionally disable it, but from user perspective it is far from the best approach. Don't forget that ADF allows to override standard methods, where we can customize behavior. One of those methods - isAttributeUpdateable(), you can override it in EO implementation class, use this method to enable conditional disable property rendering.

Download sample application - IsUpdateableByDate.zip. This app implements simple table:

We can insert new records:

Business rule says - record should be editable only when HireDate attribute value is in range of 20 days before current day. Example of editable newly inserted records (12/4/2009 and 12/1/2009):

If I will change HireDate attribute value to older date:

Record automatically will become disabled:

How it is implemented? Simply you need to define EO implementation class:

Create new transient attribute on EO level - EmployeeEditIndicator:

This attribute can be based on Groovy expression, and is used to calculate the difference between adf.currentDate and HireDate attribute. Make sure you check for null value, otherwise it will not work for newly created record:

Finally, our isAttributeUpdateable() method is overridden to compare the difference in days: