I'm really not sure about that, but I think it not works. The test results: 

java.lang.IllegalArgumentException: Parameters paths are invalid: [abc.y] for method public void br.com.caelum.vraptor.http.route.RouteBuilderTest$Generic.gee(java.lang.Object)
	at br.com.caelum.vraptor.http.route.DefaultTypeFinder.getParameterTypes(DefaultTypeFinder.java:66)

the method `gee` receives `T` as argument. Should it work?