ADF UIX - Deleting records from expert-query view

Hi gang
Does anybody have any suggestions how to do this?
I'll use the HR schema as an example.
We have default EOs defined against the departments and employees tables. Those familiar with the HR schema know there is fk between departments and employees, as well as employees to itself (eg. employees to managers).
We have created a complex VO, with a hierarchical join between employee records, as well as a join to the departments table. To create such a complex VO we have no choice but to create the VO with an "expert-query" as the standard wizard doesn't support hierarchical joins.
One important fact to note that in the VO create wizard, when you use an "expert-query" you do not select the entities used by the VO; you go straight to the query page and enter the "expert-query". As such no EOs are defined against this type of complex VO.
The VO output looks something like the following:
Department Level Employee
Finance    1     Alexandar Hunold
Finance    2     Bruce Ernst
Finance    2     David Austin
Finance    2     Valli Patabella
Purchasing 1     Den Rapaely
Purchasing 2     Alexandar Khoo....and so on.
We have created a UIX web page displaying this VO as a read-only-table.
We wish to provide a delete button such that when the user selects a record, we may delete that employee AND all relating employees in a "cascade-delete" fashion. Note that we donât wish to delete the associated department.
In implementing this delete button the delete functionality works correctly in the UIX web page by removing the record from the UIX table (assume I've also commited my changes). However a forced requery of the VO shows that the record hasn't really been deleted. I assume this is because the complex VO has no explicitly stated underlying EOs.
Does somebody have a suggestion on how I can catch the delete operation on the VO, and tell my application to instead delete a particular employee and perform a cascading delete on all other employees?
Should I create a custom method in the VO row class, to perform the deletes on the database? Or can I force the VO to perform a cascade delete on the employees EO? I just don't know what to do.....?
Any help greatly appreciated!
My environment is JDev 9.0.5.2.
Thanks!
CM.

I came across the help topic in JDeveloper 'Making an Association into a Composition' that talks about modifying an association to trigger cascade-delete. Does this help ?
- Udupa

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ADF UIX - Deleting records from expert-query view

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