Question

I have a transactional entity associated to another entity whereby the associated should not be updated in an case.

Eg. Case *-> User

Where a Case is owned by a User and reversely a User can have many associated Case.

The association is mapped using OneToMany and JoinColumn JPA annotations.

I have also tried marking the Trasactional annotation for User entity as readonly and also made the fetch methods Transient. But this doesnot seem to stop update on User if its state is changed.

Please help me a figure a way to declare a “read-only” association to User.

Answer 1

You can add updatable=falseon @JoinColumn annotation.

Furthermore you should not add a setter method for user in your Case entity and same for caseSet in your User entity. The getter getCaseSet in User entity should also return an unmodifiable collection:

public Set<Case> getCaseSet() {
    return Collections.unmodifiableSet(caseSet);
}