Serialize Java 8 LocalDate as yyyy-mm-dd with Gson

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Until further notice, I have implemented a custom serializer like so:

class LocalDateAdapter implements JsonSerializer<LocalDate> {

    public JsonElement serialize(LocalDate date, Type typeOfSrc, JsonSerializationContext context) {
        return new JsonPrimitive(date.format(DateTimeFormatter.ISO_LOCAL_DATE)); // "yyyy-mm-dd"
    }
}

It can be installed e.g. like so:

Gson gson = new GsonBuilder()
        .setPrettyPrinting()
        .registerTypeAdapter(LocalDate.class, new LocalDateAdapter())
        .create();

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