Flex :: Retrieve The Data Before Loading The Components?

In my flex application, my custom class AudLogDataGrid has a renderer function that takes a list of data and filters it, before passing it to the renderer:

private function rendererFunction(item:Object, grid:Object):ClassFactory {
var itemRenderer:ClassFactory = new ClassFactory(AudActionDropDownIR);
var FilteredAudActionData:ArrayCollection = new ArrayCollection(AudActionData.toArray());

[Code].....

However, rendererFunction runs before the data is fully retrieve from the server! Is there any way to get around this without declaring the AudLogDataGrid in AS?