What is going on???

Question

Java

I will show a simplified code from my project. I just have a butchert from him ...
MyModel.java

package com.company;

public class MyModel {
    public String myField;
}

MyView.java

package com.company;

public class MyView {
    public String myField;
}

MyMapper.java

package com.company;

public class MyMapper {
    public static MyView map(MyModel model) {
        return new MyView() {{
           myField = model.myField;
        }};
    }

    public static MyModel map(MyView view) {
        return new MyModel() {{
           myField = view.myField;
        }};
    }
}

Main.java

package com.company;

import static com.company.MyMapper.*;

public class Main {

    public static void main(String[] args) {
        MyView view = new MyView() {{
            myField = "Hello world!";
        }};

        myMethod(map(view));
    }

    public static void myMethod(MyModel model) {
        System.out.println(model.getClass().getName()); // com.company.MyMapper$2
    }
}

The code couldn't be simpler. But, note the output of the application: "com.company.MyMapper$2". What the hell is going on??? Why the hell do I have a model in a method explicitly declared to be of type MyModel that suddenly turns out to be of type MyMapper? What's the magic?

Answer 1

It is not MyMapper. It is MyMapper$2.
Replace

return new MyModel() {{
           myField = view.myField;
        }};

on the

MyModel myModel = new MyModel();
myModel.myField = view.myField;
return myModel;

and the magic will disappear