How to get reference of UI controls in a JSON Controller?

Hi Experts,

This time I was looking to create a JSON view and I was successful in creating and including various UI controls in the view. However, I am not able to get the reference of the UI controls within the controller. Initially, I thought using same set of methods of CORE I can get their reference. But I, I am not able to see any thing getting filled.

Please find the below screen shots about my view definition and controller implementation.

Please provide some inputs

Regards

Pavan