Question

I have class name in string variable model, so I want to cast an object to type of that loaded class ba reflection

Class name what I’am loading is “Notification” it is written in String variable model

String model = "Notification";   
Class<?> cls = Class.forName("biznea.zredzic.pojo."+model);

So I have abstract class PojoAbstract which extends all pojo classes as it is cls or which really is Notification.class

public class Notification extends PojoAbstract{...}

And now I want to cast this to cls real class type (Notification)

WHAT_TO_PUT_HERE po = (WHAT_TO_PUT_HERE) gson.fromJson(json.toString(), cls);

I do not want to po be a PojoAbstract type I want it to be Notification type

I hope that I was clear :S

Answer 1

You should use the method public T cast(Object obj) of Class<T>.

Object o = cls.cast(gson.fromJSon(json.toString(), cls));

But you can’t assign directly to a static declaration since at compile time you won’t know the type. You must keep the declaration as much non-specific as you can, since you can’t assume anything at compile time.