[Hibernate] Problem using Xdoclet to generate relationships [newbie]

[Matt R. <ma...@ra...>]

I'm a rookie at using Hibernate, so please bear with me.

I have User object that has a one-to-many mapping to a Resume object.  I
am getting the exception below when trying to persist the resume.

I believe I might be doing something wrong with the addMethod method on
my DAO.  The passed in "resume" object already has a "user" object set
on it.

    public Resume addResume(Resume resume) 
        throws DAOException
    {
        User user = null;
        Session ses = null;
        
        try
        {
            ses = sessionFactory.openSession();
           
            // validate that a user exists for this resume
            if (resume.getUser() == null) {
                throw new DAOException("No user assigned to resume!");
            } 
                     
            ses.save(resume);
            
            ses.flush();
            ses.connection().commit();
        }
        catch (Exception e)
        {            
            try { ses.connection().rollback(); } 
            catch (Exception ex) { e.printStackTrace(); };
            throw new DAOException(e);
        }
        finally 
        {
            try { ses.close(); } 
            catch (Exception ex) { ex.printStackTrace(); };
        }
        return resume;
    }



Testcase:
testAddResume(org.apache.persistence.ApplicationDAOHibernateTest):
Caused an ERROR
java.lang.ClassCastException
org.apache.persistence.DAOException: java.lang.ClassCastException
    at
org.apache.persistence.ApplicationDAOHibernate.addResume(ApplicationDAOH
ibernate.java:146)
    at
org.apache.persistence.ApplicationDAOHibernateTest.testAddResume(Applica
tionDAOHibernateTest.java:82)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:39)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
Caused by: java.lang.ClassCastException
    at cirrus.hibernate.type.StringType.set(StringType.java:20)
    at
cirrus.hibernate.type.NullableType.nullSafeSet(NullableType.java:32)
    at
cirrus.hibernate.type.NullableType.nullSafeSet(NullableType.java:24)
    at
cirrus.hibernate.persister.EntityPersister.dehydrate(EntityPersister.jav
a:394)
    at
cirrus.hibernate.persister.EntityPersister.insert(EntityPersister.java:4
76)
    at
cirrus.hibernate.impl.ScheduledInsertion.execute(ScheduledInsertion.java
:20)
    at
cirrus.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:1674)
    at cirrus.hibernate.impl.SessionImpl.execute(SessionImpl.java:1654)
    at cirrus.hibernate.impl.SessionImpl.flush(SessionImpl.java:1599)
    at
org.apache.persistence.ApplicationDAOHibernate.addResume(ApplicationDAOH
ibernate.java:139)
    ... 15 more