Generic deserializers with Retrofit & rxJava

Deserializer.java

public abstract class Deserializer<T> implements JsonDeserializer<T> {

    public abstract Class<T> setDestinationClass();

    @Override
    public T deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {

        Log.d("Deserializer", "deserialize json: " + json);
        return new Gson().fromJson(json, setDestinationClass());
    }
}

FastAdapter.java

public class FastAdapter<T> {
    private RestAdapter adapter;

    public PokeApi createPokeApi() {
        return adapter.create(PokeApi.class);
    }

    public FastAdapter(String endpoint, final Class<T> klazz) {

        GsonBuilder builder = new GsonBuilder();
        builder.registerTypeAdapter(klazz, new Deserializer<T>() {
            @Override
            public Class<T> setDestinationClass() {
                return klazz;
            }
        });
        Gson gson = builder.create();
        GsonConverter converter = new GsonConverter(gson);

        adapter = new RestAdapter.Builder()
                .setEndpoint(endpoint)
                .setConverter(converter)
                .build();
    }
    public PokeApi getPokedexService() {
        return adapter.create(PokeApi.class);
    }
}

ListDeserializer.java

public abstract class ListDeserializer<T> implements JsonDeserializer<List<T>> {

    public abstract Class<T> setDestinationClass();

    @Override
    public List<T> deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {

        Log.d("ListDeserializer", "deserialize json: " + json);
        List<T> list = new ArrayList<>();
        JsonArray favouritesArray = json.getAsJsonArray();

        for (JsonElement nextFavourieAddress : favouritesArray)
            list.add((T) context.deserialize(nextFavourieAddress, setDestinationClass()));

        return list;
    }
}

Main.java

public class Main{
  public static final String TAG = Main.class.getSimpleName();
  public static void main(String[] args){
    
    final FastAdapter<PokeMove> adapter = new FastAdapter<>(PokeApi.POKEMON_API_ENDPOINT, PokeMove.class);
    adapter.getPokedexService().getPokemonMove(1).subscribe(new Subscriber<PokeMove>() {
            @Override
            public void onCompleted() {
                Log.d(TAG, "onCompleted ");
            }

            @Override
            public void onError(Throwable e) {
                Log.d(TAG, "onError ");
            }

            @Override
            public void onNext(PokeMove pokeMove) {
                Log.d(TAG, "onNext pokeMove: " + pokeMove);
            }
        });
  }
}