How to use Immutable library with Interface

Question

I want to make immutables my DTO object. For that, I want to use http://immutables.github.io/.

I have the next legacy hierarchy:

public interface Interface1 extends Serializable{
    public void method1();
}

public interface Interface2<T> extends Interface1{
    public void method2();
}

public class Implementation1<T> implements Interface2<T>{
    public void method1(){ }

    public void method2(){
        return null;
    }
}

For keeping backward compatibility, I want to imeplements a new interface and implementation as given below:

@Value.Immutable
public Interface3<T> extends Interface2<T>{
    public void method3();
}

That should generate ImmutableInterface3 class to be able to obtain a builder and to be able to build the class implementation.

The problem is that I can not use the next statement:

Interface3<Object> immutableImplementationOfInterface3 = ImmutableInterface3<Object>.builder().build();

Is there any problem with in this solution?

Why can't you use that statement? Does the class not exist? Does the method not exist? — ipsi, Jun 22 '16 at 09:45

score 2 · Accepted Answer · answered Jun 22 '16 at 10:00

2

The solution is:

Interface3<Object> immutableImplementationOfInterface3 = ImmutableInterface3.<Object> builder().build();

answered Jun 22 '16 at 10:00

Sergio Rodríguez Calvo

1,183
2
16
32

How to use Immutable library with Interface

1 Answers1