Entity Object's "addNewRow" Permission, how to implement?

Hi,
this is a generic question about an implementation strategy to be followed for ADF Authorization.
I've been researching the definition of permissions at the entity object level, and successfully tested the 3 permission targets available: read, update, removeCurrentRow.
However, I'd actually need the full set of permission targets for CRUD operations, which means that ADF lacks an "addNewRow" to secure row creation on EOs.
What should be the strategy to implement that?
Is it a planned feature so waiting till, say, 11g Release 2 should bring it to the table, or has it been left out by design and thus it just won't be added? In the latter case, how to actually implement it?
I'd need to actually hide/disable the Create/CreateInsert button on my edit pages if the underlying EO does not allow new row creation for the current role. I gave a thought to EO's Custom Properties as a way to handle that extra permission flag, but is it a viable way? Can they be accessed through EL so that I can, say, use them directly in the Rendered/Disabled property of the button to regulate access?
Or would you suggest another strategy altogether?
Please share your ideas.
thanks,
RickyS

Well, I can definitely see some benefits in having security at the model layer, at least in our scenario. In a complex app with many edit pages often dealing multiple times with the same EOs, having to specify a single set of policies on the EO itself and see it automatically implemented on every page seems a plus and a step ahead from 10g - not that I tried Security in 10g, but I know the approach. Seeing fields automatically become read-only or datacontrol operation buttons such as Delete become disabled without specifying anything on the page is cleaner and will speed up development a bit, too (for large numbers of pages that might be significant, on a small app it's probably irrelevant).
Probably not as useful and powerful as model-driven lists, but still a welcome feature. You probably have a point about the double mainteinance, but that may be avoided if the BC layer security truly encompasses everything (e.g. if I can't rely on a "create" permissions, I'll certainly have to maintain additional code as well as additional BC data such as custom properties to deal with that, and this is even worse).
Another point is that I might want to enable/disable functionality on the page via EL/backing bean based on BC permissions, and that seems useful. Being able to express a condition like "this EO is accessible" or "this attribute is accessible" is sometimes much superior to "user belongs to this role". It's better to decouple roles from the secured targets and just use the latter, IMHO. Especially becuse we'll likely won't have a fixed set of static roles defined in advance for all customers we'll deploy our webapp to.
Just my 2 cents, anyway, you might end up being totally right :-)
Cheers,
RickyS

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Override the create() action in your entity object implementation:
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Hello,
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Has the Advanced View Object Techniques been referred?

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Once again the structure, sorry.
ViewObject
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..|-PId
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I am using JDeveloper 11.1.2.2.0
I am Forms developer working in a new ADF project and need some help from the ADF gurus, I am just a ADF beginner.
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I have simplified my scenario, but this is what I Need to do:
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Hi Peter
Thank you for your suggestions, both of them are interesting but unfortunately they do not solve my problem, or at least I don’t know how.
I will try to better explain my problem
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ONE; 01/01/2012; 31/01/2012; 100
ONE; 01/02/2012; 29/02/2012; 90
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V2 = ‘01/10/2012’ – queried from DBDATES
V3 = ‘03/10/201’ – queried from DBDATES
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I have
Jdeveloper version - 10.1.3.3.0
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Hi,
have a look at polymorphic view objects
http://download.oracle.com/docs/cd/E21764_01/web.1111/b31974/bcadvvo.htm#CEGDCCCB
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Hello,
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Hello Timo,
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How to implement Strategy pattern in ABAP Objects?

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Keshav has already outlined required logic, so let me fulfill his answer with a snippet
An Interface
INTERFACE lif_payment.
METHODS pay CHANGING c_val TYPE p.
ENDINTERFACE.
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CLASS lcl_payment_1 DEFINITION.
PUBLIC SECTION.
INTERFACES lif_payment.
ALIASES pay for lif_payment~pay.
ENDCLASS.
CLASS lcl_payment_2 DEFINITION.
PUBLIC SECTION.
INTERFACES lif_payment.
ALIASES pay for lif_payment~pay.
ENDCLASS.
CLASS lcl_payment_1 IMPLEMENTATION.
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ENDMETHOD.
ENDCLASS.
CLASS lcl_payment_2 IMPLEMENTATION.
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ENDMETHOD.
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CLASS lcl_main DEFINITION.
PUBLIC SECTION.
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ENDCLASS.
CLASS lcl_main IMPLEMENTATION.
METHOD constructor.
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ENDMETHOD.
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ENDMETHOD.                   ENDCLASS.
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DATA gr_main TYPE REF TO lcl_main.
DATA gr_payment TYPE REF TO lif_payment.
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"client application (which uses stategy pattern)
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gr_main->show_payment_val( ).
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gr_main->pay( ).
gr_main->show_payment_val( ).
"you can also use set_payment method to set payment type dynamically
"client would see no change
if pa_pay = 1.
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endif.
Regads
Marcin

How to implement a Session Object.

Hi,
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Friends,
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