tree 3a866dd7ab8d604792f2633b10b80898c8964e4e
parent fa8a87b2197801b09cd11d339edd33a2aded9897
author Hao Wu <haowoo@google.com> 1587531855 -0700
committer Mobile DevX Robot <mobile-devx-github-bot@google.com> 1587531882 -0700

Use lightweight generics to retrieve root objects.

In Swift, when casting, it does runtime type checks. This can fail if the object is a remote proxy (aka EDOObject). This can be bypassed by using the lightweight generics where the conversion happens in the objc level. If we provide the type to ObjC runtime at calling, the type checking happens at ObjC level, where it calls objc methods to validate, i.e. (isKindOfClass: or conformsToProtocol:); those will be then forwarded remotely and then can be successfully validated. This way, in Swift the user can directly fetch the root object through protocols.

PiperOrigin-RevId: 307746626