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

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

MenuOptionBuilder builder = 
    new MenuOptionBuilder(new MenuOptionBean()) {};

then you will get Link.

In this case

MenuOptionBuilder builder = 
    new MenuOptionBuilder(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>?