SaveOrUpdateCopy throwing error on Timestamp field.

Dynapen · **Joined:** Thu Dec 02, 2004 3:51 pm **Posts:** 8

Hibernate version:
2.1.7
Mapping documents:

Code:

<class name="com.argus.issueTracker.domain.vo.Issue" table="threads">
        <id name="threadId" column="thread_id" type="integer">
            <generator class="increment"/>
        </id>
        <property name="opened" column="opened" type="timestamp"/>
        <property name="closed" column="closed" type="timestamp"/>
        <property name="lastModified" column="last_modified" type="timestamp"/>
    </class>

Code between sessionFactory.openSession() and session.close():

Code:

try {
            newIssue = (Issue) session.saveOrUpdateCopy(issue);

        } catch (HibernateException e) {
            LOG.error(e);
        

Full stack trace of any exception that occurs:

Code:

java.lang.ClassCastException
   at net.sf.hibernate.type.TimestampType.deepCopyNotNull(TimestampType.java:63)
   at net.sf.hibernate.type.NullableType.deepCopy(NullableType.java:96)
   at net.sf.hibernate.type.TypeFactory.deepCopy(TypeFactory.java:212)
   at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:935)
   at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:866)
   at net.sf.hibernate.impl.SessionImpl.saveWithGeneratedIdentifier(SessionImpl.java:788)
   at net.sf.hibernate.impl.SessionImpl.doCopy(SessionImpl.java:4062)
   at net.sf.hibernate.impl.SessionImpl.saveOrUpdateCopy(SessionImpl.java:4029)
   at com.argus.issueTracker.domain.dao.IssueDAO.createIssue(IssueDAO.java:37)

Name and version of the database you are using:
MySQL

This error occurs when I try to insert a new object into the DB. I am sendign down a populated object to the method excerpt you see above.
Of the 3 Timestamp fields in the DB, all are defined as java.sql.Timestamp's in the java. The Opened field has a default-value of CURRENT-TIMESTAMP in the DB. The rest have a default of 0000-00-00 00:00:00.

I guess I just don't understand what would cause the ClassCast exception. I assume that it's recasting something underneath the hood, but I don't know what, or why?

max · **Posted:** Wed Dec 22, 2004 4:58 pm

what is the type of the underlying resultset column ?

if you don't know then use a debugger to step in and see what it is ,)