How to view java code for a MSS sda

Hi All,

How can I view the java code to see what RFC, function module is being passed by MSS application via the portal to backend.

I tried to extract the "sda" file by renaming it to a "zip" extension and that didn't work. Also, tried to import the sda file in NWDS but that didn't work either.

Please advise.

Thanks

G S