Multibinding with generics

问题

I am trying to create a Multibinder<A<? extends B>>. I have tried using Multibinder.newSetBinder(binder(), A.class). The second parameter is a Class<T> so doing this in my guice module gives me a Type mismatch error.

Multibinder<A<? extends B>> multibinder = Multibinder.newSetBinder(binder(), A.class)

Is it possible to bind these kind of generic collections? Maybe I could use a different kind of Multibinder? Does anyone have any ideas?

回答1:

there is a version that takes a TypeLiteral

final Multibinder<List<? extends Number>> multibinder =
            Multibinder.newSetBinder(binder(), new TypeLiteral<List<? extends Number>>() {})

来源：https://stackoverflow.com/questions/14519722/multibinding-with-generics