data table

[antonio]

Hallo,

I have this problem:

I want to show results of a query hql using 2 entities .
I want to show results in a facelet using tag

<h:dataTable id="list" value="#{list}" var="list_elem" >

Where list is obtained from a session bean.
I found many examples whith only one entity bean .

Where can I find an example with 2 or more entity bean?

Tanks for eny advice

[nickarls]

Hmmm, you could try wrap them in some object like

  public class Wrapper {
    AObject a;
    BObject b;
  }

  and

  public List<Wrapper> getData() ...

  and

  <h:outputText value="list_elem.a.aproperty"/>

[antonio]

Thanks for your post,but your answer is so criptic.
I must admit my answer wasn't clear.
I'll try to reformulate my problem:

I have 2 entity beans like follows:

@Entity
@Name("a")
public class A {
@Id
private String x;
private String y;
...getters,setters and constructors here

}

@Entity
@Name("b")
public class B {
@Id
private String x;
private String z;
...getters,setters and constructors here

}

I want to obtain a list of couples of objects A a and B b with

a.x=b.x

and show this list in my facelet.
With only A entity I can do this way:

@Stateful
@Name("aAction")
@Scope(ScopeType.SESSION)
public class A_Action{
@DataModel
List<A> la;
@PersistenceContext
private EntityManager em;
public void query(){
la=em.createQuery("select a from A a").getResultList();
}

}

In this way with method query I can instanciate la and show results.
I want to do same whith the 2 entities above.

Tanks

[nickarls]

Guessing here but the query

select a,b from A a, B b where a.x = b.x

Should return a Object[2]

But that's not really a join(?)