[hibernate-issues] [Hibernate-JIRA] Created: (HHH-4923) EnitityManager returning lazy proxy

[Billy Bob (JIRA)]

EnitityManager returning lazy proxy
-----------------------------------

                 Key: HHH-4923
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4923
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.3.2
         Environment: JBoss - MySQL 5.1 - JDK6
            Reporter: Billy Bob


Depending on the order I read entities, sometimes an em.find() returns a javassist proxy. I have the following simplified entity mapping:

class A {
    @Id 
    @GeneratedValue(strategy=GenerationType.IDENTITY)    
    private int id;
}

class B extends A {
}

class C extends A {
    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(nullable=false)
    private A ref;
}

For both scenarios, I have an entity of type B stored with id 20 and an entity of type C stored with id 30 with a reference to the first object with id 20.

Scenario - 1:
   em.find(A.class, 30); // Returns type C, lazy reference of B is loaded into session
   em.find(A.class, 20); // Error: Returns javassist proxy instead of type B

Scenario - 2:
   em.find(A.class, 20); // Returns type B, since not loaded by C lazy reference
   em.find(A.class, 30); // Returns type C

Should a call to EntityManager.find() ever return a lazy proxy?

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