def get_route(self):
"""get calculated sssp"""
route = Navigation.__route.get(self.building + Navigation.DELIM +
self.level + Navigation.DELIM +
self.start + Navigation.DELIM +
self.end, None)
if route is None:
graph = Map.get_graph(self.building, self.level)
route = self._sssp(graph)
#cache route data
Navigation.__route[self.building + Navigation.DELIM +
self.level + Navigation.DELIM +
self.start + Navigation.DELIM +
self.end] = route
return route
