I actually meant the no-argument version of "of()". Since this is getting off-topic, I suggest you search around under "java type erasure." There are people far more expert than I to describe what's going on. :)
On Thu, Jul 28, 2011 at 9:26 PM, Ben Tilford <[email protected]> wrote: > Right but Model.of accepts an instance of the generic type so it's not lost > and is available at runtime. > > static Model<T> of(T instance) > vs. > public <W> IWrapModel<W> wrapOnInheritance(Component component) > > On Thu, Jul 28, 2011 at 6:33 PM, Dan Retzlaff <[email protected]> wrote: > > > Generic types are lost by the time the method is executed, so there's > > really > > nothing the method implementation could check. Another fun example > > is org.apache.wicket.model.Model#of(). The general subject is called type > > erasure, and is one of the more confusing aspects of Java generics. > > > > On Thu, Jul 28, 2011 at 4:45 PM, Ben Tilford <[email protected]> wrote: > > > > > Without a Class argument how is it returning/casting correctly? > Shouldn't > > > it > > > be > > > > > > public <W> IWrapModel<W> wrapOnInheritance(Component component,Class<W> > > > type) > > > > > > to make W available within the method? > > > > > > > > > On Thu, Jul 28, 2011 at 12:40 PM, Dan Retzlaff <[email protected]> > > > wrote: > > > > > > > The first <W> let's the compiler know that the second <W> is a > generic > > > type > > > > and not a reference to some class named W. It's just syntax. > > > > > > > > On Thu, Jul 28, 2011 at 10:48 AM, Niranjan Rao <[email protected]> > > wrote: > > > > > > > > > Ok, I admit it - I don't understand this function at all defined in > > > > > IComponentInheritedModel > > > > > > > > > > public <W> IWrapModel<W> wrapOnInheritance(Component component) > > > > > > > > > > I don't understand meaning of <W> and IWrapModel<W>. I know > generics > > > > > generally, but this syntax has been baffling me. Based on what > > eclipse > > > is > > > > > trying to do, it seems like it will return IWrapModel<W>, but then > > what > > > > does > > > > > first <W> do? I tried some google searches, but could not find the > > > > answer. > > > > > > > > > > Thanks, > > > > > > > > > > Niranjan > > > > > > > > > > > > > > ------------------------------**------------------------------**--------- > > > > > To unsubscribe, e-mail: users-unsubscribe@wicket.**apache.org< > > > > [email protected]> > > > > > For additional commands, e-mail: [email protected] > > > > > > > > > > > > > > > > > > > >
