How to set a default start and/or end date for New Events based on trigger date.

Question

I'm using the CalendarActivityListener to get current row when clicking on an existing event. As per previous posts this listener gives you access to event detail including Start Date, End Date, etc.
However, what I want to do is to default the start (and end) dates for New Events based on the trigger date.
I've tried the CalendarListener and can grab the Trigger Date from it - however, I can't see a way to pass this directly to the popup/dialog I'm using to create the new event.
At present I'm putting the TriggerDate into the ADFContext session scope e.g. ADFContext.getCurrent().getSessionScope().put("TriggerDate",calendarEvent.getTriggerDate());
Then, I've tried multiple approaches to try and "get" the TriggerDate from session scope to drop it into my new Calendar Event basically, I'm trying to default the InputField(s) associated with the Start Date using the value from the session - I've tried
1. setting the default value for the InputField in the jspx using a binding expression i.e. value="#{sessionScope.TriggerDate}" - this actually sets the value appropriately when the jspx is rendered but, when I go to create I get a NPE and I can't debug. I assumed that it might be a Date type issue - it would appear that CalendarListener provides a date of type java.util.Date and that the StartDate attribute of my VO/EO/table is a DATE and therefore requires oracle.jbo.domain.Date so I tried casting it - to no effect
2. Using a Groovy expression *(StartDate==null?adf.context.sessionScope.TriggerDate:StartDate)* in my calendar's EventVO to default the Start Date to the same result
Any thoughts or ideas?

Answer 1

John,
Thanks for that suggestion - could not get it to work. However, I did manage a different approach. I finally determined the sequence of events in terms of how the various events and listeners fire (I think).
Basically, the CalendarActivityListener fires, followed by the listener associated with the Calendar object's Create facet, followed finally by the CalendarEventListener - the final is where the TriggerEvent is available and then finally, control is passed to the popup/dialog in the Create facet. So, my approach of trying to set/get the TriggerDate in the user's HTTP session was doomed to failure because it was being get before it had been set :(
Anyway, I ended up adding a bit of code to the CalendarEvent listener - it grabs the current BindingContext, navigates through the DCBindingContainer to derive an Iterator for the ViewObject which drives the calendar and then grabs the currently active row. I then do a few tests to make sure we're working with a "new" row because I don't want to alter start & end dates associated with an existing calendar entry and then I define the Start and End dates to be the Trigger Date.
Works just fine. Snippet from the listener follows
BindingContext bindingContext = BindingContext.getCurrent();+
*if ( bindingContext != null )    {*+
DCBindingContainer dcBindings = (DCBindingContainer) bindingContext.getCurrentBindingsEntry();+
DCIteratorBinding iterator = dcBindings.findIteratorBinding("EventsView1Iterator");+
Row currentRow = iterator.getCurrentRow();+
if ( currentRow.getAttribute("StartDate") == null)+
currentRow.setAttribute("StartDate", calendarEvent.getTriggerDate());+
if (currentRow.getAttribute("EndDate")==null)+
currentRow.setAttribute("EndDate", calendarEvent.getTriggerDate());+
*}*