CODEWITHSUNDEEP
retrofitrx-javaretrofit2rx-android
user1779394
user1779394

Reputation: 141

get object inside every call Retrofit

i'm using Retrofit and RxJava to integrate with an API every api response is like that:

{"success":true,"message":null,"object":{"bla":"String", "bla1":1}}

And the only thing that change is the object, i tried to create a "ResponseBase" and every model extends that, and create a "Response", that is what api will aways return

public class Response {
    public Boolean success;
    public String message;
    public ResponseBase object;
}

And to get the object type i want i just cast in a .map

//VehicleResponseModel extends ResponseBase

VehicleResponseModel vec = (VehicleResponseModel) response.getObject();

But this error happens:

ResponseBase cannot be cast to VehicleResponseModel

i don't have in mind a clearly way to do that.

Upvotes: 2

Views: 504

Answers (3)

Aldrin Joe Mathew
Aldrin Joe Mathew

Reputation: 482

If you're planning to go with generics you should read this : Serializing and Deserializing Generic Types

Or you can go with the answer Bartek mentioned above. 

public class ResponseBase {
    public Boolean success;
    public String message;
}

public class VehicleResponseModel extends ResponseBase {
    //Your custom vehicle model
}

And then make your retrofit interface return VehicleResponseModel.

Upvotes: 0

Than
Than

Reputation: 2769

Use generics for that:

public class Response<T> { public Boolean success; public String message; public T object; } And make your retrofit return Response<VehicleResponseModel> so you can retrieve your VehicleResponseModel from it

Upvotes: 2

Bartek Lipinski
Bartek Lipinski

Reputation: 31458

I think the problem is in your inheritance model:

This should be your parent class:

public class Response {
    public Boolean success;
    public String message;
}

This could be one of the child classes (representing the included data model):

public class SomeResponse extends Response {

    public InnerModel object;

    public static class InnerModel {
        public String bla;
        public int bla1; 
    }
}

Then when you receive an instance of your SomeResponse you can easily access e.g. someResponse.object.bla1.

Upvotes: 1

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