Use of Application Integrator

In EP 6 SP 1, URLGenerator and a few other classes have been specified as Compatibility Classes. With the javadoc of Application Integrator API , I was able to find that the Application integrator is a potential substitute for the classes. The problem is how would I bring the SAPGui or the rest of the stuff when using the Application Integrator instead of UrlGenerator API. Help is required.

regards,

Pradeep Sridharan