CallbackRequest Retrofit 2.0

gistfile1.txt

import android.util.Log;

import java.io.IOException;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;


/**
 * Created by halysongoncalves on 22/12/15.
 */
public abstract class CallbackRequest<T> implements Callback<T> {
    private static final String TAG = CallbackRequest.class.getSimpleName();

    @Override
    public void onResponse(Call<T> call, Response<T> response) {
        try {
            switch (response.code()) {
                case Kind.HTTP_200:
                    http2xx(Kind.HTTP_200, response);
                    break;

                case Kind.HTTP_201:
                    http2xx(Kind.HTTP_201, response);
                    break;

                case Kind.HTTP_204:
                    http2xx(Kind.HTTP_200, response);
                    break;

                case Kind.HTTP_400:
                    http400(response.errorBody().string(), Kind.HTTP_400);
                    break;

                case Kind.HTTP_401:
                    http401(response.errorBody().string(), Kind.HTTP_401);
                    break;

                case Kind.HTTP_403:
                    unexpectedError();
                    break;

                default:
                    unexpectedError();
                    break;
            }
        } catch (IOException ioExceotion) {
            Log.e(TAG, "Error retrieving body", ioExceotion);
        }
    }

    @Override
    public void onFailure(Call<T> call, Throwable throwable) {
        if (throwable instanceof IOException) {
            networkError();
            return;
        }
        unexpectedError();
    }

    protected abstract void http2xx(int status, Response<T> response);

    protected abstract void http400(String error, int status);

    protected abstract void http401(String error, int status);

    protected abstract void networkError();

    protected abstract void unexpectedError();

    interface Kind {

        /**
         * HTTP status code 200 was received from the server
         */
        int HTTP_200 = 200;

        /**
         * HTTP status code 201 was received from the server
         */
        int HTTP_201 = 201;

        /**
         * HTTP status code 204 was received from the server
         */
        int HTTP_204 = 204;

        /**
         * HTTP status code 400 was received from the server
         */
        int HTTP_400 = 400;

        /**
         * HTTP status code 401 was received from the server.
         */
        int HTTP_401 = 401;

        /**
         * HTTP status code 403 was received from the server.
         */
        int HTTP_403 = 403;
    }
}