package foundation.geography; import foundation.dao.preload.Bucket; import foundation.json.IJSONProvider; import foundation.json.IJSONWriter; public class CityBucket extends Bucket implements IJSONProvider { private static CityBucket instance; public static CityBucket getInstance() { return instance; } public static CityBucket newInstance() { return new CityBucket(); } public void activate() { instance = this; } @Override public void writeJSON(IJSONWriter writer) { writer.beginArray("citys"); for (City city: items) { writer.beginObject(); city.writeJSONBody(writer); writer.endObject(); } writer.endArray(); } }