ADF BC : ViewCriteria validation

Question

hi
Please consider this scenario:
(1) suppose we want some validation on changes on SCOTT.EMP rows
- EMP.EMPNO has to be a number
- EMP.JOB has to be 3 or more characters in length
- EMP.HIREDATE should be in a current two month window
(2) suppose we want the same validation on values entered to search for SCOTT.EMP rows
- EMP.EMPNO has to be an exact number (no characters or ranges allowed, or empty to find all)
- EMP.JOB has to be 3 or more characters in length (or empty to find all)
- EMP.HIREDATE should be in a current two month window (this particular search does not allow to search for older hires)
When using ADF BC, typically the validation in (1) ends up in Entity Objects.
In ADF BC a query-by-example search, as in (2), can be done using ViewCriteria.
question:
If we want to reuse the "code" that does these validations, in both (1) and (2), how do we best approach this?
many thanks
Jan Vervecken

Answer 1

Thanks for your reply Z.
I'm not sure when "moving" validation to another application layer, and creating some kind of "reverse dependency" between application layers in doing so, would be a preferred approach. Although I realize that validation and reuse could have some compromises in its implementation.
But in my scenario I think we stay inside the Business Service implementation layer, ADF BC, when using Entity Object validation and ViewCriteria (validation).
Maybe the focus of my question should be more on "ViewCriteria validation" rather than on the reuse (although it is part of the problem).
regards
Jan