I'd like to be able to create a POJO entity and declare an inner aspect. For
example:
@Entity // introduced via ITD
public class User {
@Id // introduced via ITD
Long id; // introduced via ITD
String username; // introduced via ITD
public static aspect Mapping {
declare @field: User.id: @GeneratedValue(GenerationType.SEQUENCE,
generator="USER_SEQ");
declare @field: User.username: @Column(unique = true);
}
}
For those of you who'll inevitably ask "why would you do such a crazy
thing?": in the example above, class User is receiving the field "String
username" via an introduction, and I want to add a JPA unique column
constraint on the mapping. This works fine if I declare aspect "Mapping" in
its own file, but I'd like to keep each class's mapping with the class
itself.
For those of you who'll inevitably point me to ORM XML metadata: I'm fully
aware that I can do that; I just need to use the annotations for default
mappings, overridden by XML if the user wants to override them.
-matthew
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