Description Karen Butzke 2009-11-04 16:46:26 EST

Using the JPA 2.0 spec example 1b in section 2.4.1.3

@Entity
public class Employee {
@Id long empId;
String name;
...
}
@Embeddable
public class DependentId {
String name;
long empPK; // corresponds to PK type of Employee
}
@Entity
public class Dependent {
@EmbeddedId DependentId id;
...
// id attribute mapped by join column default ("emp_empId")
@MapsId("empPK") // maps empPK attribute of embedded id
@ManyToOne Employee emp;
}

I generated tables using EclipseLink and then we were left with one incorrect validation warning on Dependent.id:
"In implied attribute override "empPK", column "empPK" cannot be resolved"

According to the spec in the EmbeddedId annotation section we should not have an implied attribute override in this case:
If the entity has a derived primary key, the AttributeOverride annotation may only be used to override those attributes of the embedded id that do not correspond to the relationship to the parent entity.