Working with DFF table defined valuesets in Oracle Application Framework

Hi, I am working on dynamically adding the conditions on the DFF valueset query on OAF page. I am doing on Supplier Site page in R12. I have extended the controller class "ByrMngSiteDFFCO" in which I am trying to get handle to the Valueset query and add 2 conditions in the query. I have tried creating a DFF bean and attach a new Viw Object to the DFF segment. However the VO is not getting recognized during runtime.

I also tried to write a code as follows but even its not working, Can anybody provide inputs? Thanks in advance.

         Dictionary[] flexLovOverrideInfo = new Dictionary[1];