injector.getInstance of a generic type

Question

I have seen this post about registering generic type.

example on how to register:

 bind(new TypeLiteral<Dal<RoutingResponse>>() {}).to((Class<? extends Dal<RoutingResponse>>) ResponseDal.class);

however how can I get an instance of a generic type from the injector?

I have tried:

injector.getInstance(Dal<RoutingResponse>().getClass());

but got compilation error.

How should I write this?

Answer 1

You can use Key to get instances of these bindings:

injector.getInstance(new Key<Dal<RoutingResponse>>() {}); // supplied by @DanielPryden in the comments

or in a longer version, with a TypeLiteral:

injector.getInstance(Key.get(new TypeLiteral<Dal<RoutingResponse>>() {}));