Java Development Tools

Hi, I'm using an entity based VO, where the entity is based on a Data base, but I want to add programmed rows to the View Object everytime it executes the entity query

Example:

when loading the page the VO gets its rows from the Data Base, but I want to get each of those rows to create new ones based on that information in the same View Object, is it possible?

My problem is that I don't know which method to use in the ViewObjectImpl, or is there a afterQuery method to override?
And I don't want ot use a coded Entity Object, I need to use a ViewObject that gets its rows from Data Base and from code.

Thanks