Jdev 10g UIX: invoking an appmodule method inline

Question

Hello,
I'm using ADF UIX in Jdev10g. I have a UIX table bound to a ViewObject, which works great. What I'm now trying to do is to create an extra column on this table which displays the result of a method call (from the AppModule). This method call takes some column data from the current row as parameters. (This fn can't be implemented in SQL as calculated col in the SQL query).
I know how to call this method via an event (from a FireAction), but this needs to be called every time a new row is rendered in the table.
So, is there a way to dynamically call an event while UIX renders the page, or is there a way to directly call this method?
My event hander looks something like:
<event name="calcit" source="*">
<invoke method="doIt" instance="${bindings.Calc}" type="..JUCtrlActionBinding">
<parameters>
<parameter .... value="${uix.current.Field1}"/>
</parameters>
</invoke>
</event>
Thanks for any help,
Matt

Answer 1

You may implement a transient attribute on the ViewObject that in it's getter performs the equivalent logic of calculating the extra attribute value based on that row's data.
Then simply bind to that attribute in a UI table binding and you should get the equivalent of 'calling a method to calculate this value'.
Note that if this value changes based on changes in dependent attributes, you also need to send appropriate change notifications for the transient attribute so that it's value is refreshed for the clients. See ADFToyStore sample on OTN on how to send change notifications.