Dynamic messageChoice based on value in each row

Question

Hi All,
Am trying to implement a requirment, am not sure how i can acchive this in OAF.
I would appriciate any one who points me in the right direction
How to have a dynamic messageChoice in OAFTable.
My scenario is like this,
     OAFTable[UI Table]
========================================
| Name | xxx      | MessageChoice values |
========================================
| 12-A | xxx | Apple,Airport |
| 15-B | xxx | Ball,Box |
| 20-S | xxx | Singapore |
=======================================|
VALUE_TABLE[DB table]
=======================
| Letter | Value |
=======================
| A     | Apple |
| S     | Singapore |
| A     | Airport |
| B | Ball |
| B | Box |
=======================
There is a messageChoice column in my OAFTable(third column as represented above),
values for this messageChoice should be filtered on 'Name' column in each row i.e extract the letter and use this extracted value to filter the values in VALUE_TABLE.
Where clause for each rows message choice should dynamically modify as
Row 1 : select value from VALUE_TABLE where letter = 'A'
Row 2 : select value from VALUE_TABLE where letter = 'B'
Row 3 : select value from VALUE_TABLE where letter = 'C'
since messageChoice EVENT is generated only after value is changed, i cann use that to modify the where clause of the VO.
Is there any feature in OAF that modifyes VO's WHERE clause for each row?
what will be the ideal approach to acchive this. surely some one would have resolved this kind of scenario..
Advance thanks for any suggestions :)
srinath

Answer 1

Hi,
Yes there is a standard approach available
Consider a container, such as a table, that has two columns. One column displays a department, while the
other column displays all the employees of that department in a poplist. The view object used for the poplist
(Pick List View Definition) needs the department number (the "Deptno" field of the container) bound for bind
variable :1. This can be done with the following code example in the controller's processRequest method:
OATableBean table = ...
OAMessageChoiceBean empPoplist =
(OAMessageChoiceBean)table.findChildRecursive("EmpName");
empPoplist.setListVOBoundContainerColumn(0, /* bind index */
table,"Deptno");
This code binds the first (0th) bind index of the employee poplist view object to the value displayed by the
column named Deptno in the table.
The method setListVOBoundContainerColumn can be called multiple times if the query used for the poplist has
multiple bind variables. Note that this approach effectively simulates a BC4J view link except that it relies on
the UI table columns for the bind values rather than the view object attribute values directly.
Thanks,
Gaurav