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From "Al Scherer (JIRA)" <j...@apache.org>
Subject [jira] Created: (IO-142) Retrieve Directory File List in Timestamp Order
Date Tue, 04 Dec 2007 21:55:43 GMT
Retrieve Directory File List in Timestamp Order
-----------------------------------------------

                 Key: IO-142
                 URL: https://issues.apache.org/jira/browse/IO-142
             Project: Commons IO
          Issue Type: New Feature
          Components: Utilities
         Environment: Java SE 5 - Windows, Linux
            Reporter: Al Scherer


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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