Spring-MVC View that allows for response context to be rendered as the result
of marshalling by a Marshaller.
The Object to be marshalled is supplied as a parameter in the model and then
detected during response rendering. Users can
either specify a specific entry in the model via the sourceKey
property or have Spring locate the Source object.
Subclasses must implement this method to actually render the view.
The first step will be preparing the request: In the JSP case,
this would mean setting model objects as request attributes.
The second step will be the actual rendering of the view,
for example including the JSP via a RequestDispatcher.