Ben Caradoc-Davies ha scritto: > On 15/06/10 15:50, Andrea Aime wrote: >> Developer depending on hashmap order -> chaos >> It's not the fault of poor hashmap that developers use it in a number >> of places where it's unnecessary if not even harmful. > > But the poor developers cannot know if they are getting a HashMap if > they are a module consumer and use, for example: > > Map<String, String> getNamespaceSchemaLocationMap(); > > Is iteration over these namespaces stable across platforms? If we add > one namespace is their order jumbled? > > The module implementor who allows an instance of HashMap to be exposed > has exposed the iteration order of the HashMap to an unsuspecting module > user. I have nothing against HashMaps that are kept well hidden, but > HashMaps allowed to leak out of confinement have an unerring ability to > make program behaviour vary across platforms.
I still see an incompetent developer in action there. You look at that interface, you get a Map, so you know: - the API designer decided the iteration order was not important - the iteration order cannot be trusted If you still rely on a specific iteration order well, you're the cause of your own undoing... Cheers Andrea -- Andrea Aime OpenGeo - http://opengeo.org Expert service straight from the developers. ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
