How to apply common View criteria for all LOV View programatically?

Question

Hi,
In my application I use nearly 100 VOs, which will be mapped as LOV to some base VOs. These VOs are not only for LOV but also will be used directly in screen as read-only table. All these VOs contains EFF_BGN_DTand EFF_END_DT. Requirement is to display only the active records in VO.
We don't want to crete view criteria at design time for each and every VO. Instead we want to have a base ViewObjectImpl class, create at runtime and add this common criteria with the existing view criterias (If any given, which are actually required for the developer for screen specific functionality).
NOTE: As all of our VOs are custom java data source implemented and none of them have queries, we cannot use whereclause API but only ViewCriteria.
We want to create a view criteria, that somewhat looks like the below condition.
           (     (TO_CHAR( EffBgnDt, 'yyyy-mm-dd') <= '2010-02-01' )
             AND (TO_CHAR( EffEndDt, 'yyyy-mm-dd') >= '2010-02-01' )
             OR
           (     (TO_CHAR( EffBgnDt, 'yyyy-mm-dd') <= '2010-02-01' )
             AND (EffEndDt IS NULL )
           )Question:
1. Which is the best place in ViewObject class, where I will be able to create common view criteria, include it with existing criterias.
Thanks in Advance.
Raghu

Answer 1

No it is not working. I've tested. When i test your implementation in my sample using AM tester, it is not at all going inside getCriteriaItemClause(ViewCriteriaItem pViewCriteriaItem). For example when i say, AM.findViewObject(String ViewObjectName), followed by getEstimatedRowCount(), it should apply common filter criteria and give me the result.
Given below required scenario:
Department table:
ID     DEPT_NAME     START_DATE     END_DATE
1     Hr          1-Jan-2010     
2     Purchasing     1-Jan-2010     31-Dec-2010
3     Shipping             1-Jan-2010     31-Dec-2055
4     Sales          1-Jan-2010     
Common criteria to be applied (Programatically) : :bind_current_date between StartDate and EndDate or :bind_current_date >= StartDate and EndDate is null
VO specific view criteria (may vary VO to VO): DeptName not equal to 'Sales'
Expected Result:
Case 1:
         a. DeptView = AM.findViewObject("DepartmentVO")
         b. DeptView.getEstimatedRowCount()
          It should give me 3 records (Hr, Shipping, Sales)
Case 2:
         a. DeptView = AM.findViewObject("DepartmentVO")
         b. Create View Criteria 'NotSalesDeptVC', which should not list out Sales department.
         c. Apply NotSalesDeptVC using RowSet rowSet = (RowSet) this.findByViewCriteria(NotSalesDeptVC, -1, ViewObject.QUERY_MODE_SCAN_VIEW_ROWS)
         d. rowSet.getEstimatedRowCount()
          It is in-memory filtering, will not disturb the default rowset, should give me 2 records (Hr, Shipping)
Case 3:
         a. DeptView = AM.findViewObject("DepartmentVO")
         b. Apply 'NotSalesDeptVC' to the default row set, followed by executeQuery
         c. DeptView.getEstimatedRowCount()
          It should give me 2 records. (Hr, Shipping)
Case 4:
         a. DeptView = AM.findViewObject("DepartmentVO")
         b. Unapply the applied 'NotSalesDeptVC', followed by executeQuery
         c. DeptView.getEstimatedRowcount()
          It should give me 3 records (Hr, Shipping, Sales)Essence is at any point of time, User should always work with active records. He no need to write extra logic to retrieve only the active records but the base Viewobject impl should have. Note, All of my view objects are custom java data source implemented and not query based. Similarly it does not meant that all of my VOs will be having some business specific View criteria. Some VOs may have. Some VOs may not have. However basic active records criteria is applicable for all VOs