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Posted to issues@commons.apache.org by "Niall Pemberton (JIRA)" <ji...@apache.org> on 2008/11/29 05:50:44 UTC
[jira] Resolved: (IO-142) Add facility to sort file lists/arrays to
Comparator implementations
[ https://issues.apache.org/jira/browse/IO-142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Niall Pemberton resolved IO-142.
--------------------------------
Resolution: Fixed
I have added sort methods (for arrays and lists) to the Comparator implementations - so now to sort by lastmodified time you can do the following:
List<File> files = ...
LastModifiedFileComparator.LASTMODIFIED_COMPARATOR.sort(files);
Closing this as resolved
> Add facility to sort file lists/arrays to Comparator implementations
> --------------------------------------------------------------------
>
> Key: IO-142
> URL: https://issues.apache.org/jira/browse/IO-142
> Project: Commons IO
> Issue Type: New Feature
> Components: Utilities
> Affects Versions: 1.4
> Environment: Java SE 5 - Windows, Linux
> Reporter: Al Scherer
> Assignee: Niall Pemberton
> Fix For: 2.0
>
> Attachments: IO-142-listfiles-v1.patch
>
>
> I searched your current Commons-IO issues/feature requests and did not find the following so I'd like to propose it as a feature request.
> Given a filename filter and dir name, the method would return a List<File> of the files that match the filter in last-modified timestamp order.
> Sun explicitly does not provide this functionality - from the Sun Java SE 5 API Javadocs, File's listFiles() method descriptions include the following disclaimer:
> "There is no guarantee that the name strings in the resulting array will appear in any specific order; they are not, in particular, guaranteed to appear in alphabetical order."
> I needed the files in last-modified order so I wrote code to do it and would be glad to share the code with the commons project if you feel it would be useful.
> The signature is:
> - public List<File> getFileListInTimestampOrder(FilenameFilter filter, String dirName)
> I've already written, tested and used code to do this.
> There are additional flavors that might be worthwhile, too.
> - public List<File> getFileListInTimestampOrderReversed(FilenameFilter filter, String dirName)
> - public List<File> getFileListInNameOrder(FilenameFilter filter, String dirName)
> - public List<File> getFileListInNameOrderReversed(FilenameFilter filter, String dirName)
> BTW, I originally posted this on commons-lang but was given feedback that it might be a better fit here.
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