Digital lens with a Canon AE?

It would depend on the type of lens mount. Generally speaking, it would probably not work too well. The AE uses full-aperture TTL metering, and its mechanism for manipulating the diaphragm of the lens is not likely to work with the "digital" lens, although that is not a sure thing. Try to gently mate the lens and body. If the lens will mount, shoot a roll of film and see how it goes.