How to use

org.jboss.seam.remoting.wrapper.MapWrapper

constructor

 Gson gson = new Gson();
MapWrapper wrapper = new MapWrapper();
wrapper.setMyMap(HtKpi);
String serializedMap = gson.toJson(wrapper);
// add 'serializedMap' to preferences

 @Controller
public class MapController {
  @GetMapping("map.html")
  public String get(Map<String, Object> model) throws Exception {
    MapWrapper wrapper = new MapWrapper();
    wrapper.getMap().put("1", "One");
    wrapper.getMap().put("2", "Two");
    wrapper.getMap().put("3", "Three");

    model.put("wrapper", wrapper);
    return "map";
  }

  @PostMapping("map.html")
  public String post(Map<String, Object> model, @ModelAttribute("wrapper") MapWrapper wrapper) throws Exception {
    return "map";
  }
}

 MapWrapper wrapper = new MapWrapper();
wrapper.wrapped.put("key1", 1);
wrapper.wrapped.put("key2", 2);

String json = gson.toJson(wrapper, MapWrapper.class);
System.out.println(json);

MapWrapper newWrapper = gson.fromJson(json, MapWrapper.class);
for(Entry<String, Integer> e : newWrapper.wrapped.entrySet()) {
  System.out.println(e.getKey() + ", " + e.getValue());
}

 public class MyTypeAdapter implements JsonSerializer<MapWrapper>, JsonDeserializer<MapWrapper> {
  @Override
  public JsonElement serialize(MapWrapper src, Type typeOfSrc, JsonSerializationContext context) {
    JsonObject obj = new JsonObject();
    src.wrapped.entrySet().forEach(e -> obj.add(e.getKey(), new JsonPrimitive(e.getValue())));
    return obj;
  }

  @Override
  public MapWrapper deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
    MapWrapper wrapper = new MapWrapper();
    json.getAsJsonObject().entrySet().forEach(e -> wrapper.wrapped.put(e.getKey(), e.getValue().getAsInt()));
    return wrapper;
  }
}

 private void setClientAdditionalInfo(Map map, Client client, User user) {

  Map additionalInfo = (Map) map.get("additionalInfo");
  MapWrapper wrapper = new MapWrapper(additionalInfo);

  client.setGender(wrapper.get("gender"));
  ...
}

@Override
public MapWrapper marshal(Map<String,String> m) throws Exception {
MapWrapper wrapper = new MapWrapper();
List<JAXBElement<String>> elements = new ArrayList<JAXBElement<String>>();
  for (Map.Entry<String, String> property: m.entrySet()) {

 /**
 * <p>
 * ref: http://stackoverflow.com/questions/21382202/use-jaxb-xmlanyelement-type-of-style-to-return-dynamic-element-names
 * </p>
 * @author MEC
 *
 */
public static class MapAdapter extends XmlAdapter<MapWrapper, Map<String, String>>{

  @Override
  public Map<String, String> unmarshal(MapWrapper v) throws Exception {
    Map<String, String> map = v.toMap();

    return map;
  }

  @Override
  public MapWrapper marshal(Map<String, String> m) throws Exception {
    MapWrapper wrapper = new MapWrapper();

    for(Map.Entry<String, String> entry : m.entrySet()){
       wrapper.addEntry(new JAXBElement<String>(new QName(entry.getKey()), String.class, entry.getValue()));
    }

    return wrapper;
  }

}

  w = new MapWrapper(beanManager);
else if (obj.getClass().isArray()
    || Collection.class.isAssignableFrom(obj.getClass()))

 w = new MapWrapper();
else if (obj.getClass().isArray() || Collection.class.isAssignableFrom(obj.getClass()))
 w = new BagWrapper();

  w = new MapWrapper(beanManager);
else if (obj.getClass().isArray()
   || Collection.class.isAssignableFrom(obj.getClass()))