According to the developer of the world’s first Nikon G (F-mount) to Sony E-mount (Full Frame) electronic aperture and autofocus adapter, they will add full phase detection support on the new Sony a7RII. The official release date is still unknown, but it is expected to be announced in 2015 and branded by Commlite.
The company (Commlite) has already made lots of adapters, and you can find them on eBay, including the electronic AF adapter for Canon EF lenses to Sony E-mount.
Below is a video showing the autofocus (Nikon G to Sony E-mount) at work.
Note: If you are a Sony Camera User, you can now join the Sony Camera Users Facebook Group to share your Sony photography and advice, ask and answer questions that arise and help each others!
Sony Camera Users: https://www.facebook.com/groups/SonyCameraUsers