On Thu, 18 Nov 2021 09:10:16 GMT, Andrew Leonard <aleon...@openjdk.org> wrote:
>> src/jdk.jartool/share/classes/sun/tools/jar/Main.java line 131:
>>
>>> 129: // There's also a files array per version
>>> 130: // Use a LinkedHashMap to keep original insertion ordering
>>> 131: Map<Integer,String[]> filesMap = new LinkedHashMap<>();
>>
>> The entries of `filesMap` is sorted by the version. Is the value of each
>> entry already sorted? Does that matter? It's unclear to me since `expand`
>> is called for each entry's value:
>>
>>
>> private void expand() throws IOException {
>> for (int version : filesMap.keySet()) {
>> String[] files = filesMap.get(version);
>> expand(null, files, pathsMap.get(version), version);
>> }
>> }
>
> @mlchung the way I looked at this was the filesMap is a HashMap, so the
> filesMap.keySet() iteration order is not defined (or necessarily
> deterministic), the expanded order of the file sets for each version could be
> ver1, ver2, ver3 or ver3, ver2, ver1... the next time you run it with the
> same parameters.
> LinkedHashMap will ensure the iterated order is as inserted (or as specified
> in the jar args list..)
>
> Although you say "filesMap is sorted by version", I don't see where that is
> done?
I'm guessing Mandy asks not if the keys are sorted -- this is changed by your
patch, but if the value retrieved -- the String[], is sorted. It's a valid
question, I think. It's not apparent to me at least that this is the case. If
it is not sorted when it is inserted it needs to be sorted when extracted.
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PR: https://git.openjdk.java.net/jdk/pull/6395
