[jboss-user] [EJB 3.0] - Proxy-Class

Hello! I got a problem which is similar to the following posts (no solution yet provided): http://www.jboss.com/index.html?module=bb&op=viewtopic&t=88515 http://www.jboss.com/index.html?module=bb&op=viewtopic&t=121044 I have entities which are organized in an inheritance hierarchy (please have a look a the code below). When i execute a query (please look at the stateful session bean below) it returns a proxy-object. But it should be an instance of the concrete entity bean. I am facing this problem only when querying in an inheritance hierarchy. For "normal" entity beans it works fine. How can i tell the entity beans in the inheritance hierarchy that the whole hierarchy should be fetched eager without eager fetching. I found a (not suitable) workaround when i use the annotation @Proxy(lazy =false) at base class level. With this annotation i get the concrete instance of the entity bean (RfAuthProject-instance with id 483 like in the example below) but all associations of each entity in the hierarchy are eager fetched too. That's a problem because, it gets really slow. How can i achieve that only the inheritance hierarchy is fetched and none of the associations? Thanks in advance for your help. kind regards Patrik ps.: Environment: JDK1.5, JBoss 4.2.1 (with EJB3.0 embedded) pps.: Example code below: | @Stateful | public class MainProjectDTO implements MainProjectLocal, MainProjectRemote | { | public Project getProject() | { | // trivial example for my problem | Query query1 = em.createQuery("FROM Project p WHERE p.id = 483"); | Project project = query1.getSingleResult(); | | // the returned project is a proxy like Project_$$_javassist_16 but | // should be an instance of RfAuthProject because it really is one. | | | // here lies my problem | // project with id=483 is definitly a RfAuthProject | if (project instanceof Project) --> true | if (project instanceof RfProject) --> false | if (project instanceof RfAuthProject) --> false | | // following class cast fails | RfAuthProject rfAuthProject = (RfAuthProject) project; | | | return project; | } | } | Three entity beans in an inheritance hierarchy. | @Entity | @Inheritance(strategy = InheritanceType.JOINED) | @Table(name = "project") | public class Project | { | } | | @Entity | @Table(name = "rf_project") | @Inheritance(strategy = InheritanceType.JOINED) | @PrimaryKeyJoinColumn(name = "id") | public class RfProject extends Project | { | } | | @Entity | @Table(name = "rf_auth_project") | @Inheritance(strategy = InheritanceType.JOINED) | @PrimaryKeyJoinColumn(name = "id") | public class RfAuthProject extends RfProject | { | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4104908#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...