3 Replies Latest reply on Sep 23, 2002 9:41 AM by Victor Batista

    CMR java.lang.ClassCastException

    Victor Batista Newbie

      Hello!
      I am trying to establish a relationship between two entity beans. Although, when I try to call any of the accessors, I get the following exception:

      16:24:46,744 ERROR [LogInterceptor] TransactionRolledbackException, causedBy:
      java.lang.ClassCastException: enk.interfaces.PlaceData
      at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.setInstance
      alue(JDBCCMRFieldBridge.java:624)
      at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.setValue(JD
      CCMRFieldBridge.java:563)
      at org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler.invok
      (EntityBridgeInvocationHandler.java:125)
      at org.jboss.proxy.compiler.Runtime.invoke(Runtime.java:59)
      at enk.entity.PersonCMP$Proxy.setPlace()
      ....

      I am using JBoss 3.0.0 with bundled tomcat 4.0.3. I am using only local interfaces to access the relation methods.
      My beans are Person and Place. Each person belongs to one place, and each place can have multiple Persons (1-N).

      Person Bean:
      /**
      *
      * @ejb:relation name="Person-Place"
      * role-name="Person-Has-One-Place"
      * target-multiple="yes"
      *
      * @jboss:relation related-pk-field="placeId"
      * fk-column="pplaceid"
      *
      * @ejb:interface-method view-type="local"
      *
      **/
      public abstract enk.interfaces.PlaceData getPlace();

      /**
      * @ejb:interface-method view-type="local"
      **/
      public abstract void setPlace(enk.interfaces.PlaceData place);

      Place Bean:
      /**
      *
      * @ejb:relation name="Person-Place"
      * role-name="Place-Has-Many-Addresses"
      * @ejb:interface-method view-type="local"
      *
      **/
      public abstract java.util.Set getPersons();

      /**
      * @ejb:interface-method view-type="local"
      *
      **/
      public abstract void setPersons(java.util.Set persons);




      I create persons from a Session Bean through the local interface of the Person bean:
      /**
      * insertPerson method.
      *
      * @return an int value.
      *
      * @ejb:interface-method view-type="local"
      *
      */
      public int insertPerson(String person, int placeId)
      // throws RemoteException
      {
      int ret = 0;
      try {
      PlaceData place = getPlace(placeId); //Returns the correct Place object
      PersonData lData = null;
      Context lContext = new InitialContext();

      PersonLocalHome lHome = (PersonLocalHome) lContext.lookup("ejb/test/PersonLocal");

      lData = new PersonData();
      lData.setName(person);
      PersonLocal lEntity = lHome.create( lData, place );


      PersonPK pk = (PersonPK) lEntity.getPrimaryKey();
      ret = pk.getId();
      } catch ( Exception e ) {
      e.printStackTrace();
      }
      return ret;
      }

      The ejbCreate of the Person Bean is as follows:
      public PersonPK ejbCreate(PersonData key, PlaceData place)
      throws
      InvalidValueException,
      EJBException,
      CreateException
      {
      setId(count++);
      setName(key.getName());
      setPlace(place);
      return null;
      }

      First of all, I create a few places.
      When I try to create the one person, I get the exception above.

      I would appreciate any help. I am getting crazy .....


      Thanks in advance,
      Victor Batista