public static Json makeReply(Activity activity, Performative performative, String replyWith) {
Json s =
object(
ACTIVITY_TYPE,
activity.getType(),
CONVERSATION_ID,
activity.getId(),
PERFORMATIVE,
performative.toString());
if (replyWith != null) return s.set(IN_REPLY_TO, replyWith);
else return s;
}
public static Json createMessage(Performative performative, Activity activity) {
return createMessage(performative, activity.getType(), activity.getId());
}