jpa-2.0

There is entity A referring (many-to-one) entity B, with inverse (mapped-by) reference from B to A. Also there is reference A to C and inverse reference C to A. When I issue entityManager.remove(A) then flush(), "delete" is not gerenated! But also there are no exceptions. It's just like no remove() was called at all. Why would that happen? If before remove() we extract A from reverse references B.listOfA and C.listOfA, "delete" is generated as expected. Also note my another question where I came to conclusion that orphanRemoval not always works as expected. Now I am starting to suspect that

I have 3 entities with ManyToMany relationships: Role Entity: @Entity public class Role { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer roleID; private String roleName; private String description; @ManyToMany(cascade = {CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH}, fetch = FetchType.EAGER) @JoinTable(name = "role_permission", joinColumns = {@JoinColumn(name = "role_id")}, inverseJoinColumns = {@JoinColumn(name = "permission_id")}) private Set<Permission> permissions = new LinkedHashSet<Permission>(); } Permission Entity: @Entity public class Permission

How can I generate JPA2 compliant @Entity from existing Databases?. I found this: Question Still its not clear if JBoss will generate compliant JPA2 and also I would like to know if there is a vendor independent way to do this. You can use a plugin like Eclipse Dali to do the trick for you. You can refer to the documentation, section 3.11 Generating Entities from Tables . I do not know of any specific vendor independent tool to do this, though. Try using OPENJPA Reverse mapping tools. They offer lot more facility and are easy to configure. This example would clarify. If you are using maven as