Is LOV able to do real validation like Oracle Forms LOV?

Dear JHeadstart Team,
I am using JDeveloper 10.1.3.3 and JHeadstart 10.1.3.2.52.
To simplify the situation, I explain the problem using scott schema.
I created a page on the emp table and used a LOV on the deptno and check the lov for validation for the lov. I changed the query of DeptLookupView (which lov uses) and added a where deptno <= 30 to that, so lov just showed the department with deptno <= 30.
Then, When I entered number 40 in the deptno field and pressed tab, the lov poped up with No rows found in that.I pressed the cancel button and the amount of deptno remained 40. I pressed Save and data successfully commited to database.
It seems to me a little strange. This capability exists in the Oracle form and when we use lov for validation in the Oracle form it does not permit us to enter a value which does not exist in the lov. I expected to see that functionality here too. Am I wrong or Is it a bug in JHeadstart?
If it is not a bug and this functionality is not supported in the JHeadstart, is there any way to achieve this functionality.
Any help would be highly appreciated.
Thanks in advance,
Navid

Navid,
It is not a bug in JHeadstart, it is intended behavior of ADF Faces. The ADF Faces valueChangesListener that we use to validate and display the LOV window only fires when the user-entered value changed, since the last time the listener fired. When you cancel the LOV and click the Save button the listener no longer fires.
Note however that you are implementing a business rule (deptno must be <- 30) in the view layer only, which is a bad practice. I suggest that you implement the same rule in Business Components and/or in the database.
This way, the user will get an error message when he tries to save a value > 30.
Steven Davelaar,
JHeadstart Team.

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