Entity with nested entities, create method generated incorrectly

For the sake of this question, assume I have two entities: Header, and LineItem.  The Header has 0..n LineItems.  I've modeled this in the CAS by creating two entities, with a nested relationship between teh two.  Tables were created correctly, everything looks fine.  I then created an Application Service, which uses the Header an LineItem entities.  I created CRUD methods for the Header object; when selecting the types to be included as part of the create method, I selected Header details, as well as the list of LineItem's.
The generated create method (the _R version), however, does not have the correct method signature.  It looks like this:
public xxx..Header_R createHeader_R(java.lang.String[] lineItems) throws  ...
Why is lineItems declared as String[] instead of LineItem[]?  All objects have been marked as remote enabled, so that's not the issue.  Is this a bug, or a feature?
The other CRUD methods only expose the Header, so I could exclude the LineItem from the create, and just perform an update after the create, but I'd rather not have to create objects in two steps.
Anyone else run into this situation?

Hello Ken!
CRUD operations usually belong to the Entity Services that are generated for the business objects you modelled.
Based on these Entity Services you can implement custom Application Services which can be provided with any signature you want them to have.
Any Application Service has to be implemented by you. Thereby, you can rely on the Entity Services generated for your business objects.
If you want to deal with sets of objects like line items, you should model a set type LineItemList or so which wraps the set of items. Otherwise, you won't be able to expose your Application Service as a Web Service.
You could now implement an Application Servcie operation which takes a Header object as well as a LineItemList object as input parameters. However, it is questionable if you should deal with multiple business object types in one Application Service operation. Implementing multiple operations which rely on keys might result in a better design.
Best regards
Alexander

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    create or replace view dp_master_view as
    select p.dept_no,p.dept_name, p.dept_mgr.idno mgr_idno, p.dept_mgr.name mgr_name,p.dept_mgr.phone mgr_phone from department_persons p
    create or replace view dp_detail_view as
    select p.dept_no,e.* from department_persons p,table(p.dept_emps) (+) e
    SQL> desc department_persons
    Name Null? Type
    DEPT_NO NOT NULL NUMBER
    DEPT_NAME CHAR(20)
    DEPT_MGR PERSON_TYP
    DEPT_EMPS PEOPLE_TYP
    SQL> desc person_typ
    Name Null? Type
    IDNO NUMBER
    NAME VARCHAR2(30)
    PHONE VARCHAR2(20)
    Thanks, regards
    Miklos HERBOLY

    HI Everybody,
    I have a relational table one of whose columns is an object and another column is a collection stored as a nested table. I would like to set up a user interface ADF Rich Client, where I consider the parent table as Master and the nested table as Detail. If I build a READONLY master and detail view with a view link based on the primary key of the parent table, it works fine. However, when I try to generate entities from the views, the detail view object disappears from JDeveloper. Otherwise, when I try to make business components from tables, the nested table is not listed. Do anyone know a solution?
    Please help!
    Here is the view creation script with table structures:
    create or replace view dp_master_view as
    select p.dept_no,p.dept_name, p.dept_mgr.idno mgr_idno, p.dept_mgr.name mgr_name,p.dept_mgr.phone mgr_phone from department_persons p
    create or replace view dp_detail_view as
    select p.dept_no,e.* from department_persons p,table(p.dept_emps) (+) e
    SQL> desc department_persons
    Name Null? Type
    DEPT_NO NOT NULL NUMBER
    DEPT_NAME CHAR(20)
    DEPT_MGR PERSON_TYP
    DEPT_EMPS PEOPLE_TYP
    SQL> desc person_typ
    Name Null? Type
    IDNO NUMBER
    NAME VARCHAR2(30)
    PHONE VARCHAR2(20)
    Thanks, regards
    Miklos HERBOLY

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