If I understand the requirements correctly, EJBs will do the transformation. For SAP ABAP to access, EJBs must be exposed as web service. SAP NetWeaver Java application server can expose this service.
SAP NWDI "term" is generally used as code repository and transport management (DTR, CTB, CTS)
So the whole point of this is can we port over what our Weblogic is doing over to the back end (SAP E-HR) system
iff SAP E-HR is dual stack (ABAP and Java) stack.