Hi all,

My question is as subject. The reason being that the application I'm working on use a legacy DB, and the domain object created only need a few fields from the underlaying table, therefore, some of the PK columns are not presented in the domain object, not sure how to deal with this case.

And also when querying the object the condition will involve some of the fields that is not presented in the domain. Please advise, if hibernate is able to handle these kind of situations, or I have to go with JDBC.

Thanks in advance.

As Identity for an object is mandatory to identify the object uniquely, so I don't think Hibernate will allow to do mapping without primary key, generally it is not recomended to design the object without identity(PK),

But in your case you are working with lagecy database, so that may requires domain object without primary key.

Thanks for the reply, so that leaves me no choice without changing the domain object, have to go with JDBC then.

Relation between database data and domain objects is not clear. Am I right assuming that you just create domain objects on the stored data basis (not including all PK information)? Do you need to change domain object state and persist them after that or all you need is just to load particular data and don't bother with saving its updated state?