Cannot resolve generic parameter TypeToken from Guava

Question

I am developing a framework for building generified menus for a Selenium testing framework, and I\'ve been using Guava TypeToken to resolve the types of generic parameters, but

Answer 1

That's how the TypeToken "hack" works. It uses Class#getGenericSuperclass() (or getGenericSuperInterface). Its javadoc states

If the superclass is a parameterized type, the Type object returned must accurately reflect the actual type parameters used in the source code.

In this case, that is O, here

public abstract class AbstractMenuOptionBuilder<O extends IClickable>

You get what is hard coded in the source code. If you hard code Link as the type argument, as you do here

MenuOptionBuilder<Link> builder = 
    new MenuOptionBuilder<Link>(new MenuOptionBean()) {};

then you will get Link.

In this case

MenuOptionBuilder<O> builder = 
    new MenuOptionBuilder<O>(new MenuOptionBean()){};

you've hard coded O, so that's what you will get.

Here are some more things I've written on the subject of type tokens:

• Gson TypeToken with dynamic ArrayList item type
• is it possible to use Gson.fromJson() to get ArrayList<ArrayList<String>>?