Overriding doDML() to populate an attribute with a gapless sequence
In this recipe, we will go over a generic programming technique that you can use to assign gapless database sequence values to entity object attributes. A gapless sequence will produce values with no gaps in between them. The difference between this technique and the one presented in the Using a custom property to populate a sequence attribute recipe, is that the sequence values are assigned during the transaction commit cycle instead of during component creation.
Getting ready
We will add this generic functionality to the custom entity framework class that we created in the Setting up BC base classes recipe in Chapter 1, Pre-requisites to Success: ADF Project Setup and Foundations. The custom framework classes in this case reside in the SharedComponets workspace. You will need access to the HR database schema to run the recipe's test case.
How to do it...
1. Start by opening the
SharedComponetsworkspace in JDeveloper. If...
