| Specifies a composite primary key class that is mapped to
multiple fields or properties of the entity.
The names of the fields or properties in the primary key
class and the primary key fields or properties of the entity
must correspond and their types must be the same.
Example:
@IdClass(com.acme.EmployeePK.class)
@Entity
public class Employee {
@Id String empName;
@Id Date birthDay;
...
}
| 