Generic Lists?

[Yissachar Radcliffe]

I have a POJO which contains a List<Foo>. When this is translated by j2objc it loses the generic type safety and I'm forced to cast to Foo when trying to do anything with the objects that I get from the List.

I understand that Objective-C doesn't support generics but isn't j2objc in a position where it could generate a class which subclasses JavaUtilList and overrides methods to be type safe for Foo?

Is there any way to accomplish this or am I stuck casting everything? I am using Swift if that makes any difference.

[Tom Ball]

You're describing type-erasure -- Java classes don't have generic collections, either. Casts are necessary for native Objective-C to safely use generic lists, but not between translated files because the translator already verified those references are safe.

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[Keith Stanger]

The subclassing idea would generate piles of extra code. Imagine if we generated an extra Objective-C class for every declared generic type!

Can you try using a helper function or macro to hide away all the casts?