User impersonation support by SAP JCo

Dear all,

I have a question on how user impersonation (in other words user delegation) is supported by SAP JAVA Connector (JCo).

Let say I have an 3rd party JAVA application communicating with SAP NetWeaver ABAP based system. The JAVA app actually manipulates the data in SAP by calling BAPI. What are my possibilities of having user which is used to connect from JAVA app to SAP delegated? E.g. instead of using generic user to manipulate the data a real user (who is logged to JAVA app) would be used to make a call into SAP.

thanks

m./