MappingException No persister for Long when inserting child

reford · **Posted:** Thu Jun 09, 2005 5:39 am

Hey everyone,

My application has a very simple object model: a parent and a child entity.

I can insert and update the parent identity, however, I get a

Code:

MappingException No persister for java.lang.Long

exception whenever I try to insert a child entity.
Hibernate receives all object properties (parent id, child properties and the child id is determined as well).

Actually, I guess this not a difficult problem, but I did not find anything in the forum or in the documentation which helps me any further.
<br />
Any hint or help is highly appreciated!!!

Hibernate version:
Hibernate 2

Mapping documents:
The parent entity:

Code:

<hibernate-mapping>
   
   <class name  = "de.Platinion.rr.QuestGen.P200038_26.BusinessLogic.DTOP200038_26" 
         table = "MAIN">
      
      <id name="id" type="java.lang.Long" column="ID">
         <generator class="increment"/>
      </id>
      
      <property name="interviewpartner"/> 
      <property name="position"/> 
      <property name="email"/> 
      <property name="telephone"/> 
      <property name="date"/> 
      <property name="appName"/> 
      <property name="status" type="de.Platinion.rr.QuestGen.DataTypes.StatusUserType"/> 
      
      <set name    = "interfaces"
          lazy    = "true">
          <key column="MAIN_ID"/>
          <one-to-many class="de.Platinion.rr.QuestGen.P200038_26.BusinessLogic.DTOP200038_26_Interfaces"/>
      </set>
   </class>
</hibernate-mapping>

The child entity:

Code:

<hibernate-mapping>
   <class name  = "de.Platinion.rr.QuestGen.P200038_26.BusinessLogic.DTOP200038_26_Interfaces" 
         table = "INTERFACES">
      
      <id name="id" type="java.lang.Long" column="CHILD_ID">
         <generator class="increment"/>
      </id>
      
      <property name="interface"/> 
      <property name="comment"/> 
      <property name="direction" type="de.Platinion.rr.QuestGen.DataTypes.StatusUserType"/> 
      
      <many-to-one name     = "mainId"
                class    = "de.Platinion.rr.QuestGen.P200038_26.BusinessLogic.DTOP200038_26"
                column   = "MAIN_ID"
                cascade  = "delete"
                not-null = "true"/>
   </class>
</hibernate-mapping>

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

Code:

...
   public void insertChildData(DTOP200038_26_Interfaces pDTO)
      throws Exception {
      Session lSession = HibernateUtil.currentSession();
      
      // get a transaction
      Transaction lTransaction = lSession.beginTransaction();
      
      // save the obtained data transfer object
      lSession.save(pDTO);
      
      lTransaction.commit();
      
      // close the session 
      HibernateUtil.closeSession();
   }

Full stack trace of any exception that occurs:

Code:

javax.servlet.ServletException: No persister for: java.lang.Long
   org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:516)
   org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:423)
   org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
   org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
   org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

net.sf.hibernate.MappingException: No persister for: java.lang.Long
   net.sf.hibernate.impl.SessionFactoryImpl.getPersister(SessionFactoryImpl.java:347)
   net.sf.hibernate.impl.SessionImpl.getClassPersister(SessionImpl.java:2690)
   net.sf.hibernate.impl.SessionImpl.getPersister(SessionImpl.java:2697)
   net.sf.hibernate.impl.SessionImpl.isUnsaved(SessionImpl.java:1091)
   net.sf.hibernate.impl.SessionImpl.nullifyTransientReferences(SessionImpl.java:1037)
   net.sf.hibernate.impl.SessionImpl.nullifyTransientReferences(SessionImpl.java:1023)
   net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:927)
   net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:857)
   net.sf.hibernate.impl.SessionImpl.saveWithGeneratedIdentifier(SessionImpl.java:779)
   net.sf.hibernate.impl.SessionImpl.save(SessionImpl.java:738)
   de.Platinion.rr.QuestGen.P200038_26.BusinessLogic.InsertInterfacesService.insertChildData(InsertInterfacesService.java:47)
   de.Platinion.rr.QuestGen.P200038_26.Presentation.action.InsertInterfacesAction.execute(InsertInterfacesAction.java:69)
   org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
   org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
   org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
   org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Name and version of the database you are using:
MySql, 4.0.21