PLSQL and Java XML type mapping

Question

Running database 10gR2.  Trying to create a Java stored procedure that returns an XML type (oracle.xdb.XMLType) like so:
class MyCoolClass
   static oracle.xdb.XMLType doSomething( String xmldata)
     oracle.xdb.XMLType xmlt = new oracle.xdb.XMLType( xmldata );
     return xmlt;
This, of course, is wrapped by a PL/SQL function:
function doSomething( xmldata varchar2 ) return SYS.XMLTYPE AS LANGUAGE JAVA
name 'MyCoolClass.doSomething(java.lang.String) return oracle.xdb.XMLType';
While everything compiles (that means it should work, right?), the above codes generates a runtime error ORA-00932 'inconsistent datatypes' error.   I'm not  sure what I'm doing wrong, it was my understanding that a default mapping existed between the PL/SQL SYS.XMLTYPE and oracle.xdb.XMLType.  Is what I'm attempting even possible?

Answer 1

Sorry, I was being sloppy with my code example.  It should be:
class MyCoolClass
   static oracle.xdb.XMLType doSomething( String xmldata)
      java.sql.Connection c = java.sql.DriverManager.getConnection("jdbc:default:connection:");
     oracle.xdb.XMLType xmlt = new oracle.xdb.XMLType( c, xmldata );
     return xmlt;