I’m a little bit confused.
Which IDE are you using that you still need the BOR?
Typically the JCO allows you to use a BOR and download all definitions on the fly as needed from SAP.
All RFC function in SAP including BAPIS should be downloadable on the fly. They are automatically entered into the BOR when you request the function make up (signature) from the BOR. That’s why you have to have a valid open SAP connection on the BOR.
The only things you have to create and add to the BOR are java functions implemented through JCO as ABAP RFC callable functions…
So as long as your BOR has not been garbage collected you can really reuse it. Be carefull however if you closed your SAP connection you will have to put a new connection on the BOR. If you want to save some time check out if the BOR is serializable and save/read it to/from file at the end/start of your application…
Hope it helps some.