Perform an AM extenstion and create an utilyty method like isTotalValid. This method loops through (iterator) the corresponding data in VO and sums up the amount and retruns a boolean. Perform a CO extenstion so that when the (Save/Submit?) button is pressed, capture the envent in processFormRequest of CO and call the isTotalValid method of the AM (pageContext.getApplicationModule). If false is returned, throw new OAException.
Do we need AM extension for that scenario..
Can you explain with detailed step inorder to proceed further.
Can I have update on numeric validation based on Attribute name