Oracle BLOB insert problem

Question

I'm getting a ClassCastException when I try to the blob I get from my CallableStatment. I've seen alot of post about similar issues with oracle 9 and inserting blobs but I havn't found a solution..
Here is the few lines that Im doing..
When I check to see what type of instance this blob is this is what I get in my debugger oracle.sql.BLOB@71d768
so When I ((BLOB)blob).getBinaryOutputStream() I get the ClassCastException..
I've tried to get the innermost delegate and a number of other things.. When I try to cast anything to the Oracle type I get the ClassCastException. When i do an instanceof on the blob it isn't an oracle Blob.. So why does the debugger and getClass().getName() tell me it is.. And is the any work around for this..
Thanks
Dan
cstmt.registerOutParameter(6, OracleTypes.BLOB);
             cstmt.execute();
             Blob blob = cstmt.getBlob(6);
                       if(blob != null) {
                     writer = new ObjectOutputStream( ((BLOB)blob).getBinaryOutputStream());
                    if (writer != null) {
                    writer.writeObject(bean);
                      writer.flush();
                      writer.close();
                 con.commit();

Answer 1

Yes, I modified some code that a collegue used in a standalone application.. His solution was using a CLOB.. I just modified my solution to use a CLOB instead of a BLOB(saving a bean as xml instead of the bean object)..
So i litterally copied his code line for line.. And Im getting the same error. My app is running in tomcat whereas my collegue is using it in a standalon application. I just went thru all lib directories to make sure I only have one copy of the oracle ojdbc14.jar which is in the conf/lib directory of the tomcat server..
I even moved my table from our oracle9 db to our oracle 10 db and still no luck..
String beanToXml = xstream.toXML(bean);          
cstmt.execute();
oracle.sql.CLOB clob = ((OracleCallableStatement) cstmt).getCLOB(6)
             if (clob != null) {
                 writer = ((CLOB) clob).getCharacterOutputStream();
                 if (writer != null) {
                   writer.write(beanToXml.toCharArray());
                   writer.flush();
                   writer.close();
             }