/** * Assumes the input map always has String keys and the values are of types: String, Version, * Long, Double or List of the previous types. Lists are copied and Version objects are converted * to String objects. */ private static Map<String, Object> newAttributesMapDTO(Map<String, Object> map) { Map<String, Object> dto = new HashMap<String, Object>(map); /* Lists are copied and Version objects are converted to String objects. */ for (Map.Entry<String, Object> entry : dto.entrySet()) { Object value = entry.getValue(); if (value instanceof Version) { entry.setValue(String.valueOf(value)); continue; } if (value instanceof List) { List<Object> newList = new ArrayList<Object>((List<?>) value); for (ListIterator<Object> iter = newList.listIterator(); iter.hasNext(); ) { Object element = iter.next(); if (element instanceof Version) { iter.set(String.valueOf(element)); } } entry.setValue(newList); continue; } } return dto; }