Updating DB & objectid.next from outside DODS

I have a Postgres database with a set of tables generated by DODS 
(enhydra 3.1).  I would like to make updates to these tables from 
outside of DODS (in the specific case, from a C++ program).  The DODS 
generated tables include the objectid and objectversion columns. 
Furthermore there is the objectid table whose "next" value needs 
updating as well.

My intuition suggests having my C++ program use objectid.next for the 
ObjectId in the newly inserted row and then increment objectid.next. 
Wrap this up on a locked transaction.

However, according to the docs, the class 
com.lutris.appserver.server.sql.standard.StandardObjectIdAllocator 
handles the maitenance of object ids, keeps a cache of them, etc.  The 
docs for this class further assert "Object ids can only be created via 
this manager."  I fear any DB operation I perform on object ids outside 
of DODS will screw things up.

Is there a more appropriate way to solve this problem?

Thanks,
--Sunil