Currently BLOB is written out by the cmp engine wrapped in a jboss MarshalledValue type. There is no reason to do this as the class loading issues can be handled when the data is read from the database by the cmp engine. Writting the data out in the jboss wrapper prevents use by jdbc clients. We need to provide a pair of param-setter/result-reader classes using the
http://wiki.jboss.org/wiki/Wiki.jsp?page=CMPParamSettersResultReaders extension mechanism to allow the blob data to not include the MarshalledValue wrapper.