What is the use case of a generic class whose type parameter is itself?

Asked Dec 28 '13 at 08:42

Active Dec 28 '13 at 08:51

Viewed 106 times

In which situations would we use the following technique?

class A<T>
class B extends A<B> // the B appears twice

What are the benefits of such an approach?

class HttpBase<T>

Then

class HttpRequest extends HttpBase<HttpRequest>

Also

class HttpResponse extends HttpBase<HttpResponse>

edited Dec 28 '13 at 08:51

Duncan Jones

asked Dec 28 '13 at 08:42

liango

2

Well, in C++ this is called the Curiously Reoccurring Template Pattern. Maybe look into that? – ApproachingDarknessFish Dec 28 '13 at 08:44

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