I would like to know best approach for the following scenario.
1) i have file coming from legacy system
2) On target side SAP , I have BAPI's available (Create, Save, Commit )(No standard IDOC available)
I can create Custom IDOC and call those BAPI's in Custom Function Module
I can use ABAP proxy and call BAPI's
What is the best way of doing this? and Is there any other way?