def add_item(self, info, id=None):
if id is None:
id = info.get_id()
if self.has_item(id):
raise RuntimeError("item '%s' already exist in '%s'" % (id, self))
item = create_instance(info, id)
self.__items.append(item)
self.__items_dict[id] = item
def _load_instance(typ, node, id):
if issubclass(typ, Item):
obj = create_instance(typ, id)
obj.load(node)
else:
val = node.get()
# XXX
if val is None and typ is str:
obj = None
else:
obj = typ(val)
return obj
