java.nio.file.Files.isReadable() slow on Windows 7

[Alan Bateman]

On 11/05/2012 15:47, Zhong Yu wrote:
> However... test it on an unreadable file, checkAccess(path) does not
> throw an exception. Please take note of it
>
> The file has Read permission Deny for all users. For this file
>
> Files.isReadable() returns false.
>
> checkAccess(path, AccessMode.READ) throws
>      java.nio.file.AccessDeniedException: \tmp\unreadable.txt:
> Effective permissions does not allow requested access
>
> AsynchronousFileChannel.open(path, READ) throws
>      java.nio.file.AccessDeniedException: C:\tmp\unreadable.txt
>
Understood and I'll add it to the bug. The issue is that fast path is 
assuming that the file is readable when it have READ_ATTRIBUTES access. 
You can verify that by denying READ_ATTRIBUTES + READ.

-Alan