Mapped Superclass

Question

I need to mapped a model object, which extends into the object to be inizialized.

Example:

class User{
}
class RequestUser extends User{
}

void main(){
    User user = new User();
    RequestUser reqUser = user;
}

Is there a way to do it native ?, or should I use an external library? Which do you recommend?

Thanks!

score 1 · Answer 1 · answered Aug 08 '18 at 19:12

Take a look in this link -> explicit casting from super class to subclass.

If you instantiate a new UserRequest, it will have UserRequest and User properties, UserRequest extends User. Maybe you should do this:

class User{
    int id;
    String name;
}
class RequestUser extends User{
    int requestCode;
}

public void teste(){
    User user = new RequestUser() {{
        id = 0;
        name = "User1";
    }};
    RequestUser reqUser = (RequestUser)user;
}

score 0 · Answer 2 · answered Aug 08 '18 at 18:39

0

Why "RequestUser" must be a class? It should be a instance of User.

answered Aug 08 '18 at 18:39

Vinícius Carvalho

101
4

This answer is slightly low quality. It could have been added as a comment. – cosmoonot Aug 08 '18 at 18:41
User it is a model, and RequestUser it's other model extended of User. I need instance new RequestUser with User data, i need mapped a superclass. it is understood? – Juan Ignacio Aug 08 '18 at 18:44
Cant use initiate you "User" as a "RequestUser"? – Vinícius Carvalho Aug 08 '18 at 18:54
@cosmoonot, i'm sorry, but I cant comment in the question, I need to have a 50 reputation to comment – Vinícius Carvalho Aug 08 '18 at 18:57
User have your propertys, and UserRequest have user's propertys and more. I need instance new UserRequest with full properties that the class User has. In other languages exist mapped for it. In android, ¿do yo know how do? – Juan Ignacio Aug 08 '18 at 19:06

Mapped Superclass

2 Answers2