R12.2.4 Data lost after using Dialog Page and return back to calling page.(Help Please! )

Question

Hi Team,
I am new to OAF and is working on a requirement to add some custom validations when the user clicks on a Button in a standard seeded page.
The approach I took was to Extend the seeded Controller object that handled this button press event and put my custom logic in the extended controller and override the standard controller via personalization.
The standard flow was that upon pressing the Complete Button in Page A ,user was taken to the next seeded page (Page B) to perform certain operations based on the records that were selected in Page A.
Part of the custom validation requirement was that if certain validations were not met then the user needs to be shown a Pop-up asking if they really wanted to proceed and if they selected Yes then continue with the standard seeded flow(move to page B)  and if they selected NO then just stay on the current page.
I was able to use OADialogPage and do this partially , the issue I am running into is that once the user selects the one or more records  using a check box from a multi-record (table) region and hits the Complete Button on page A and if the validation fails then a modal page is shown and the user makes a selection i.e.either Yes or No from the modal page and when they return to calling page (i.e. Page A) , All the Data (records ) that they selected previously is lost (Page is refreshed). Based on what I see on this forum I suspect that it is because after clicking on Yes on the modal page and while returning to the original page the processRequest fires again and VO data is queried again and all selections on the page A are lost. Since I am trying to alter the flow in seeded pages based on user intervention I am kind of lost as to how this issue can be fixed. i.e. either prevent the page refresh or preserve the selections that were made prior to navigating to the modal page. Any Help is truly appreciated !!
My Code :
public void processFormRequest(OAPageContext oapagecontext, OAWebBean oawebbean)
if (oapagecontext.getParameter("completeOps") != null) {
if (warnCount > 0) {
  //OAException message = new OAException("Not in Sequence...", OAException.WARNING);
  //oapagecontext.putDialogMessage(message);
  OAException message = new OAException("Rule XYZ Violated .Do you want continue ?",OAException.WARNING);
  OADialogPage dialogPage = new OADialogPage(OAException.WARNING, message, null, "","");
  String yes = oapagecontext.getMessage("AK", "FWK_TBX_T_YES", null);
  String no = oapagecontext.getMessage("AK", "FWK_TBX_T_NO", null);
  dialogPage.setOkButtonItemName("ConYesButton");
  dialogPage.setNoButtonItemName("ConNoButton");
  dialogPage.setOkButtonToPost(true);
  dialogPage.setNoButtonToPost(true);
  dialogPage.setPostToCallingPage(true);
  dialogPage.setOkButtonLabel(yes);
  dialogPage.setNoButtonLabel(no);
  oapagecontext.redirectToDialogPage(dialogPage);
if (oapagecontext.getParameter("ConYesButton") != null)   {
          // Write Action code for Yes Button
          oapagecontext.putParameter("completeOps", "Continue");
if (oapagecontext.getParameter("ConNoButton") != null){
            // Write Action code for No Button
            String errormsg = "Rule Violations have occured ";
            throw new OAException(errormsg);
   super.processFormRequest(oapagecontext, oawebbean);

Answer 1

I was able to work around this issue by adding a simple check in the processRequest method of my extended Controller to prevent the call to super.processRequest incase when the control returns to the page after the user has made a selection in the Dialog Page
if((oapagecontext.getParameter("ConYesButton") == null) && (oapagecontext.getParameter("ConNoButton") == null)) {
  super.processRequest(oapagecontext, oawebbean);
Thanks !