Help with Hibernate PO

Question

Hello guys/gals..
I'm stucked at a very weird problem which i cannot figure out..
Here is the senario: I have a method called findByName() in my factory class
public static List findByName(Session session, String name)
        throws HibernateException
        Query query = session.createQuery("from CustomerTypeImpl c where c.name = ?");
        query.setParameter(0, name);
        return query.list();
    }Then in my manager class, the method above is called
List customerTypes = CustomerTypeFactory.findByName(session,  "ADMIN");i'm getting an error message "java.lang.ClassCastException: java.util.ArrayList" at return query.list().
Here is another catch, findByName() is also used in other manager class but the problem does not appear..
Please please.. someone enlighten me !

Answer 1

I guess putting the stacktrace will be useful:
java.lang.ClassCastException: java.util.ArrayList
        at net.sf.hibernate.type.SetType.wrap(SetType.java:24)
        at net.sf.hibernate.impl.WrapVisitor.processArrayOrNewCollection(WrapVisitor.java:78)
        at net.sf.hibernate.impl.WrapVisitor.processCollection(WrapVisitor.java:49)
        at net.sf.hibernate.impl.AbstractVisitor.processValue(AbstractVisitor.java:69)
        at net.sf.hibernate.impl.WrapVisitor.processValues(WrapVisitor.java:93)
        at net.sf.hibernate.impl.SessionImpl.flushEntity(SessionImpl.java:2492)
        at net.sf.hibernate.impl.SessionImpl.flushEntities(SessionImpl.java:2458)
        at net.sf.hibernate.impl.SessionImpl.flushEverything(SessionImpl.java:2260)
        at net.sf.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:1805)
        at net.sf.hibernate.impl.SessionImpl.getQueries(SessionImpl.java:1568)
        at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1533)
        at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
        at my.com.calyx.creditFile.pObj.LegalIdTypeFactory.findByName(LegalIdTypeFactory.java:101)
        at my.com.calyx.creditFile.dao.SponsorManager.addSponsor(SponsorManager.java:366)
        at my.com.calyx.creditFile.action.SponsorAction.add(SponsorAction.java:146)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
        at org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:252)
        at my.com.calyx.creditFile.action.BaseAction.execute(BaseAction.java:54)
        at my.com.calyx.creditFile.action.SponsorAction.execute(SponsorAction.java:55)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at my.com.calyx.creditFile.bo.AccessFilter.doFilter(AccessFilter.java:76)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)From the stacktrace above, the place where the program stop is in this method :
public static java.util.List findByName(net.sf.hibernate.Session session, java.lang.String name)
        throws net.sf.hibernate.HibernateException
        net.sf.hibernate.Query query = session.createQuery("from LegalIdTypeImpl l where l.name = ?");
        query.setParameter(0, name);
        return query.list();
    }And my mapping file for LegalIdType is as follows:
<hibernate-mapping default-cascade="none">
    <class name="my.com.calyx.creditFile.pObj.LegalIdTypeImpl" table="LEGALIDTYPE" dynamic-insert="false" dynamic-update="false">
        <id name="uid" type="java.lang.String" unsaved-value="null">
            <column name="UID" sql-type="VARCHAR(32)"/>
            <generator class="uuid.hex">
            </generator>
        </id>
        <property name="name" type="java.lang.String">
            <column name="NAME" not-null="true" unique="false" sql-type="VARCHAR(30)"/>
        </property>
        <property name="description" type="java.lang.String">
            <column name="DESCRIPTION" not-null="false" unique="false" sql-type="VARCHAR(80)"/>
        </property>
        <property name="seq" type="java.lang.Integer">
            <column name="SEQ" not-null="false" unique="false" sql-type="INTEGER"/>
        </property>
        <many-to-one name="partyType" class="my.com.calyx.creditFile.pObj.PartyTypeImpl" outer-join="auto" foreign-key="LEGALIDTYPE_PARTY_TYPE_FKC">
            <column name="PARTY_TYPE_FK" not-null="false" sql-type="VARCHAR(32)"/>
        </many-to-one>
    </class>
</hibernate-mapping>Hope it will help u all out to help me figure this mess up..