def allow(self,right):
rv = SecurityHandler.check_right(self.__obj_id__, right)
if rv=='0':
return 0
elif rv=='1':
return 1
rv = -1
for i in self.get_parents():
if i == None:
continue
if i.allow(right)==0:
return 0
elif i.allow(right)==1:
rv = 1
return rv
