[jira] Issue Comment Edited: (IO-142) Add facility to sort file lists/arrays to Comparator implementations

["Niall Pemberton (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IO-142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12651694#action_12651694 ] 

niallp edited comment on IO-142 at 11/28/08 8:50 PM:
--------------------------------------------------------------

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:

http://svn.apache.org/viewvc?view=rev&revision=721626

  List<File> files = ...
  LastModifiedFileComparator.LASTMODIFIED_COMPARATOR.sort(files);

Closing this as resolved

      was (Author: niallp):
    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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