Oracle JHeadstart Developer's Guide - Downloads - Oracle

4.3. Using the Create New Application Definition Wizard
4.3.1. Dropdown Lists or Lists of Values
After enabling JHeadstart, you will typically create a JHeadstart Application Definition
xml file. You can create a new Application Definition by right-clicking the
ViewController project and choosing ‘New JHeadstart Application Definition’.
At this point, JHeadstart will make changes to your ADF Business Components Model.
For each View Link, JHeadstart generates a Lookup data collection by default. JHeadstart
adds new instances of the ViewObjects to the Application Module with name *Lookup.
You can inspect this behavior by editing your Application Module.
The reason is that a lookup needs to maintain its own set of rows. For example, when
you have a page that maintains Employees, and in another page there is a list of values
for selecting an employee, there need to be two instances of the same ViewObject. One
instance holds the rows for the maintenance page, and the other holds the rows for the
list of values. This way you can perform a search in the Employees maintenance page,
without limiting the available values in the lookup.
One of the questions asked by the New Application Definition Wizard is ‘Generate
LOV's instead of dropdown lists?'
JHeadstart Developer’s Guide Using the JHeadstart Addins 4 - 7