RE: MANullAccessor

Also most > access strategies seem to be useless to me. I only use the > NullAccessor (used internally), the ContainerAccessor (used > internally), the SelectorAccessor, and rarely the > AutoSelectorAccessor. Time for a clean-up?> I think the ChainAccessor strategy is also very useful> From: renggli(a)iam.unibe.ch> Subject: Re: MANullAccessor> Date: Mon, 15 Oct 2007 07:24:04 +0200> To: smallwiki(a)iam.unibe.ch> > > Does MANullAccessor have to be so so... erm unusable?> > One important thing to notice is that the accessors are also used to > establish identity between descriptions. In case of the NullAccessor > this is done trough an UUID, in case of the SelectorAccessor this is > naturally done trough its selector.> > > If you happen to use it nothing seems to work with it.> >> > i.e. accessor selector doesnt work, one should argue that it shouldnt,> > but is it doing a good job of being a null?> > Since the NullAccessor is the default, it is supposed to warn the > user of a missing access strategy. In case descriptions are created > by end-users (where something like an access strategy would be out of > scope), the NullAccessor establishes a perfect identity, that can > then be used in #readUsing: and #write:using: to dispatch the access > for example to a dictionary.> > > Most users of read: dont test canRead: first.> > I wonder if #canRead: and #canWrite: are still needed? Also most > access strategies seem to be useless to me. I only use the > NullAccessor (used internally), the ContainerAccessor (used > internally), the SelectorAccessor, and rarely the > AutoSelectorAccessor. Time for a clean-up?> > > I am thinking of implementing a subclass MADummyAccessor which does> > implement read: just so as it can play with the other accessors in> > mementos etc.> > That would make sense in your case, I guess.> > Cheers,> Lukas> > -- > Lukas Renggli> http://www.lukas-renggli.ch> > > _______________________________________________> SmallWiki, Magritte, Pier and Related Tools ...> https://www.iam.unibe.ch/mailman/listinfo/smallwiki