> So basically any API call that is available in the client library
> (e.g. gds32.dll) could be exposed nativly in Java.

No. I was thinking only about implementing the wire protocol. If
ServicesAPI is not available (CS case), then it will be not supported
by type 4 JDBC driver.

But there are some ideas of implementing type 2 JDBC driver, so there
ServicesAPI will be available. It seems that finally we will have two
drivers: type 2 and type 4.

Best regards,
Roman Rokytskyy