Willi, I might get back to this. But there is one thing I love about Google Guice is that it reduces the number of line of code. I know this should not be the ultimate goal, but I find the "java bean" setters/ getters is a little bit heavy in some cases, especially when 90% they are the same single line setter/getter logic. C# has a better way of hanling this IMO.
Jeremy, On Jul 2, 2:45 am, Willi Schönborn <[email protected]> wrote: > On 02/07/10 11:37, Maaartin-1 wrote: > > > > > IMHO, it's a sort-of bug or a missing feature. There's no nice solution > > for the problem described. Quite often, a class knows suitable defaults > > for missing ctor parameters and something like this should be supported. > > Probably @Nullable is fine the way it works, but then there should be an > > @Optional annotation on arguments allowing both a binding to null and a > > missing binding. > > > You can achieve something like > > > @Inject > > public void injectWebServiceProperties( > > @Optional @Named("akui.webServiceURL") String webServiceUrl, > > @Optional @Named("akui.webServiceUsername") String webServiceUsername, > > @Optional @Named("akui.webServicePassword") String webServicePassword) { > > ... > > } > > Honestly, using 3 setters would be sooo much cleaner and easier to read. > > > > > only using field injection, which is obviously a bad thing. I've already > > ran into this several times and I don't think it's so rare it should be > > ignored. > > > On 10-07-02 10:31, [email protected] wrote: > > >> On Jul 1, 3:30 pm, Jeremy Chone<[email protected]> wrote: > > >>> Is this a wanted feature or a bug? Is there any way to avoid to have > >>> one setter per property while keeping any of them optional? > > >> It's a feature. Although they're frequently confused, 'optional=true' > >> and @Nullable mean quite different things. > > >> '@Inject(optional=true)' means that the injector should suppress any > >> error from not being able to fulfill the dependencies of an injection. > >> The injector will try its best to find bindings, even if that involves > >> creating just-in-time bindings. But if any of the parameters to a > >> method cannot be satisfied, the entire call is skipped. > > >> '@Nullable' means that the injector will not report an error if a null > >> value is returned by the binding for an injection. The binding must > >> still exist. The only time @Nullable is useful is when you implement a > >> provider method (@Provides) or a provider class that may return null. -- You received this message because you are subscribed to the Google Groups "google-guice" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-guice?hl=en.
