I'm not sure this is really any better ... Fundamentally there's a ?
in that param, and as a result, it's impossible to do a put in a
typesafe way. You don't know what V is. I _think_ the signature as it
is now is actually correct, but if you need to insert into that map
inside createRequest, you simply have to copy it. I don't think it's
possible to ensure compiler-enforceable type-safety in any other way
(which is to say, "accurate type safety").
ms
On May 15, 2009, at 9:51 PM, Henrique Prange wrote:
Hi Mike,
The following solution doesn't solve the unchecked type cast
problem. But it respect PECS definition and accept a Map<String,
NSArray<String>> as parameter. Do you think it is reasonable?
public <V extends List<String> > WORequest treateRequest(String
method, String url, String anHTTPVersion, Map<String, ? super V>
someHeaders, NSData content, Map<String, Object> someInfo) {
...
someHeaders.put("foo", (V) Collections.singletonList("bar"));
...
}
Cheers,
Henrique
On May 15, 2009, at 8:29 PM, Mike Schrag wrote:
Map< String, List< String >> correctHeaders = new HashMap<
String, List< String > >();
btw, this is what i was saying that the only typesafe way to do
this is to copy the original headers -- so you would do new
HashMap<String, List<String>>(originalHeaders) and then you'd have
a properly typesafe <String, List<String>> that you can happily
insert into whatever List<String> subtypes you want inside of
createRequest. But it takes a copy to do it, which kind of sucks.
ms
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