I have a simple enum:
public enum Season {
@SerializedName("0")
AUTUMN,
@SerializedName("1")
SPRING;
}
Starting some version, GSON became able to parse such enums. To make sure, I did this:
final String s = gson.toJson(Season.AUTUMN);
It works as I expected. Output is "0"
. So, I tried use it in my Retrofit services:
@GET("index.php?page[api]=test")
Observable<List<Month>> getMonths(@Query("season_lookup") Season season);
/*...some files later...*/
service.getMonths(Season.AUTUMN);
And also added logging to be really certain about its result:
HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();
httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient httpClient = new OkHttpClient.Builder()
.addInterceptor(httpLoggingInterceptor)
.build();
But it failed. @Query
totally ignored @SerializedName
and used .toString()
instead, so the log shown me .../index.php?page[api]=test&season_lookup=AUTUMN
.
I traced Retrofit sources and found file RequestFactoryParser
with lines :
Converter<?, String> converter =
retrofit.stringConverter(parameterType, parameterAnnotations);
action = new RequestAction.Query<>(name, converter, encoded);
It seems, like it doesn't care at all about enums. Before these lines, it tested rawParameterType.isArray()
to be an array or Iterable.class.isAssignableFrom()
and nothing more.
Retrofit instance creation is:
retrofit = new Retrofit.Builder()
.baseUrl(ApiConstants.API_ENDPOINT)
.client(httpClient)
.addConverterFactory(GsonConverterFactory.create(gson))
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.build();
gson
is GsonBuilder().create()
. I peeked at sources, there is predefined ENUM_TypeAdapters.ENUM_FACTORY
in it for enums, so I leave it as it is.
The question is what can I do, to prevent using toString()
on my enums and use @SerializedName
? I use toString()
for other purposes.
Enum<?>
only? I would like to use reflection in that for@SerializedName