Oracle BLOBs and Hibernate

hi guys

how do you store BLOBs in Oracle ?

I have managed to store a CLOB (>4kb) and I thought the same idea (as decribed here http://www.hibernate.org/56.html) would work with BLOBs, but it doesn't. This code appears to be writing something into the BLOB, but nothing gets written into the database. This code creates a new row, but BLOB is empty.

I am using Hibernate 3.2, Oracle 10g XE and thin jdbc driver.

Report newReport = new Report(item.getName(), Hibernate.createBlob(new byte[]{0}) , Hibernate.createBlob(new byte[]{0}) );
                       
                        session.save(newReport);                       
                        session.flush();
                       
                        session.refresh(newReport, LockMode.UPGRADE);
                       
                        SerializableBlob blob = (SerializableBlob) newReport.getReport();
 
                        InputStream isr = item.getInputStream();
                        OutputStream os = blob.setBinaryStream(0L);
                       
                        while(true)
                        {
                            byte[] buff = new byte[1024];
                            int read = isr.read(buff,0,buff.length);
                            if (read!=-1)
                            {
                                os.write(buff,0,read);
                            } else
                            {
                                break;
                            }
                        };
                       
                        os.flush();
                        os.close();