oid as long type

What's the reason of using int rather than long for the large object oid? I am experiencing a problem where the database server is generating oids exceeding the size for a Java int, and got "org.postgresql.util.PSQLException: Bad value for type int". Could this be solve by making org.postgresql.largeobject.LargeObject.oid a long type and make corresponding changes to the source tree?

(for example in org.postgresql.jdbc3.Jdbc3ResultSet.getBlob(int), instead of:

return new Jdbc3Blob(connection, getInt(i));

do:

return new Jdbc3Blob(connection, getLong(i));)

I am not familar with the internals of the driver, so not sure if there are other complications. Any advice on using long oids would be much appreciated.

Thanks in advance!

Ryan