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From Niall Pemberton <>
Subject Re: [IO] DirectoryWalker Collection parameter types
Date Fri, 08 Jan 2010 10:18:05 GMT
On Thu, Jan 7, 2010 at 9:51 PM, sebb <> wrote:
> The overridable methods in DirectoryWalker currently use Collection<?>
> as a parameter type.
> As far as I can tell, the Collections need to contain File objects, so
> would it not be better to use Collection<File>?
> Might be nice to use Collection<? extends File>, but when I tried that
> there were some problems with the test cases.
> Any views?

DirectoryWalker doesn't actually control what gets put into the
collection - the user can put whatever they want. So someone could,
for example, use it to add String file names to the collection. If we
lock it down to File then that would break for them.


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