RFR: 8364277: (fs) BasicFileAttributes.isDirectory and isOther return true for NTFS directory junctions when links not followed [v2]

[Johannes Döbler]

On Tue, 5 Aug 2025 17:48:59 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Change `BasicFileAttributes` for Windows such that for a directory junction `isOther` returns `true` but all other `is*` methods return `false`. Without this change, `isDirectory` also returns `true`.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8364277: 1) Add and use package scope isDirectoryJunction(); 2) Remove explicit delete of junction from test

test/lib/jdk/test/lib/util/FileUtils.java line 457:

> 455:         // Create a directory junction or a symbolic link
> 456:         if (IS_WINDOWS) {
> 457:             if (!nativeLibLoaded) {

Suggestion: Since this logic to load the FileUtils library is now used twice, why not move it into a helper method which might also be synchronized (if tests are executed in parallel).

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PR Review Comment: https://git.openjdk.org/jdk/pull/26631#discussion_r2255022423