Note that different OSes may present the files in different ways.
This will depend on how the OS stores the entries in the directories.
For example OpenVMS always sorts directory entries (*).
But AFAIK Unix systems don't.
Unless the Javadoc specifies the sort order, I think you will need to
do the sorting yourself.
Not all use cases need sorted output, so it would be wasteful to
always sort the output.
(*) Or at least, it used to.
This may have been changed, as it caused issues for very active file
systems and large directories.
On 6 June 2016 at 14:03, Stian Soiland-Reyes <st...@apache.org> wrote:
> Does the java.nio.newDirectoryStream give you the expected file system order?
>
> You can compare with python os.listdir:
>
> stain@biggiebuntu:~/rc/incubator-taverna-common-activities$ python -c
> "import os; print(os.listdir('.'))"
> ['taverna-spreadsheet-import-activity', 'release.properties',
> 'taverna-external-tool-activity', '.git', 'taverna-wsdl-generic',
> 'taverna-xpath-activity', 'pom.xml', 'taverna-beanshell-activity',
> 'NOTICE', 'pom.xml.releaseBackup', 'README.md',
> 'taverna-rest-activity', 'DISCLAIMER', 'taverna-interaction-activity',
> '.travis.yml', '.gitignore', 'taverna-wsdl-activity', 'LICENSE',
> 'target']
>
> Which at least in Linux should match the order of: ls -Ul
>
>
> We've talked about updating IO to use Java 7, then
> java.nio.newDirectoryStream can be used and provide the native
> (possibly weird, but faster) order.
>
> On 6 June 2016 at 11:53, Sergio Fernández <wik...@apache.org> wrote:
>> Hi,
>>
>> I've just needed a simple feature, but it should not be that simple if
>> there is not helper available in Commons IO...
>>
>> I'd like to get the list of files of a directory ordered from the
>> filesystem (data, name, etc). I think FileUtils does not provide such
>> feature, and all solutions I found are quite naive (order in memory the
>> name and order them).
>>
>> So, I'd like to ask if there is a good reason for that, probably not enough
>> support from the IO/NIO stdlib. But I'd like to know the context before I
>> give it a try ;-)
>>
>> Cheers,
>>
>> --
>> Sergio Fernández
>> Partner Technology Manager
>> Redlink GmbH
>> m: +43 6602747925
>> e: sergio.fernan...@redlink.co
>> w: http://redlink.co
>
>
>
> --
> Stian Soiland-Reyes
> Apache Taverna (incubating), Apache Commons
> http://orcid.org/0000-0001-9842-9718
>
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