UME API when ABAP is a data source

Hello,

I am trying to use UME API in Java...

My question is :

If my Portal is pointing to ABAP as datasource...

Then these java UME APIs will fetch me results from which UME database ?

Either it will be ABAP data source OR will it be J2EE engine data source ?

Please suggest me keeping below 2 scenarios in view:

1. If I access that application from Portal.

2. if I access that application without portal as a standalone application.