GSON on Google App Engine throws a Security Exception

Question

I am trying to convert an object into JSON using the GSON library on Google App Engine. For some reason, it throws this exception and I don\'t understand how to solve this.

Answer 1

You can construct GsonBuilder with .excludeFieldsWithoutExposeAnnotation(), and mark all serialized fields with @Expose annotation. In this case, Gson doesn't try to serialize fields other that you want.

GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.excludeFieldsWithoutExposeAnnotation();
String json = gsonBuilder.create().toJson(modelObject);