How to check does interface with generic fit to class

I have some interface with generic type interface DummyInterface<T> and i have class to which i have to set interface

 class DummyClass<T>{
        public void setDummyInterface(DummyInterface<T> dummyInterface){
            //set interface
        }
    } 

Imagine the situation where i store DummyClass with different generics in ArrayList. When i get class from list i don’t know the generic of class, and i want to check if interface has the same generic or not; For example i want to check like this

if(dummyInterface<SomeTypeIKnow>.getGenericType() == dummyClass.getGenericType()){
      dummyClass.setDummyInterface(dummyInterface);
}

Answer

You can use something like TypeTools (a library that I authored) to resolve type arguments so long as the argument is captured in a type definition. For example:

interface DummyStringInterface extends DummyInterface<String> {}

Class<?> t = TypeResolver.resolveRawArgument(DummyInterface.class, DummyStringInterface.class);
assert t == String.class;