public RoomMap createMapById(String map_id){
RoomMap map = ((Map<String, RoomMap>) MapContext.map).get(map_id);
System.out.println("can't find map "+map_id);
assert(map != null);
return map.clone();
}
public void reloadAllMap(){
Iterator<String> itr = MapContext.map.keySet().iterator();
while(itr.hasNext()){