Java: Using Gson in an Applet causes SecurityException

Question

I\'m trying to use Google Gson in my Java Applet, but when I do I get

Exception in thread \"Thread-19\" java.security.AccessControlException: access deni

Answer 1

I solved this problem using a custom deserializer.

I had a class with two members, a timestamp and a list of doubles. This is the code that worked for me.

GsonBuilder gsonBuilder = new GsonBuilder();
    gsonBuilder.registerTypeAdapter(TimestampedValueList.class, new JsonDeserializer() {
        @Override
        public TimestampedValueList deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
            long timestampMs = json.getAsJsonObject().get("timestampMs").getAsLong();
            double[] valueList = context.deserialize(json.getAsJsonObject().get("valueList"), double[].class);
            return new TimestampedValueList(timestampMs, valueList);
        }
    });
gson = gsonBuilder.create();

Hope this can help anyone!