Episode #166 - Guillaume Laforge on Groovy also included Guillaume
describing
how Groovy gets the Generics info from Java [class-loaded] classes!
Posse, posse...

;-)

On Nov 6, 6:53 pm, Casper Bang <[EMAIL PROTECTED]> wrote:
> It's actually all described in chapter 7.5 of "Java Generics and
> Collections" which the Posse have endorsed in the past. Basically you
> can introspect it (look for ParameterizedType) and it can help you in
> a few instances, but in my humble experiences those solutions often
> turns ugly and fragile (played with that a while 
> ago:http://coffeecokeandcode.blogspot.com/2008/05/type-strategy-pattern.html).
>
> /Casper
>
> On Nov 6, 3:13 pm, Jess Holle <[EMAIL PROTECTED]> wrote:
>
> > Viktor Klang wrote:
> > > On Thu, Nov 6, 2008 at 1:49 PM, Jess Holle <[EMAIL PROTECTED]
> > > <mailto:[EMAIL PROTECTED]>> wrote:
>
> > >     Viktor Klang wrote:
> > >>     Actually guys, referential equality is kind of retarded, so the
>
> > >>     Map<String,Integer>.class == Map<Foo,Bar>.class
>
> > >>     example is bad.
>
> > >>     However,
>
> > >>     Map<String,Integer>.class.equals(Map<Foo,Bar>.class) SHOULD
> > >>     return false
> > >     No, it MUST not -- else loads of things break.
>
> > > If you want to make an omelet, you've got to break some eggs...
>
> > Yes, but breaking eggs just cause you feel like it is for toddlers, not
> > chefs.
>
> > >     Further == and .equals MUST give the same results for Class
> > >     objects -- else loads of things break.
>
> > >     The "ConcreteClass" noted below would not be a Class -- it would
> > >     be a new API.
>
> > > Yeah, I realize that, that's why I'm moving away from Java.
>
> > I'm still missing what the real benefit to having these Class objects be
> > unequal is.  It sounds nice in some ivory tower sort of way, but really
> > as long as you have access to the fact that the "K" parameter is String
> > and the "V" parameter is Integer (and the compiler can use this as well
> > to do things like "new V[]"), I don't really see any issue.
>
> > --
> > Jess Holle
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