[jira] [Created] (IO-495) FileUtils.listFilesAndDirs behaves unexpected

["David Georg Reichelt (JIRA)" <ji...@apache.org>]

David Georg Reichelt created IO-495:
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             Summary: FileUtils.listFilesAndDirs behaves unexpected
                 Key: IO-495
                 URL: https://issues.apache.org/jira/browse/IO-495
             Project: Commons IO
          Issue Type: Improvement
          Components: Utilities
    Affects Versions: 2.4
         Environment: Ubuntu, Java 8
            Reporter: David Georg Reichelt
            Priority: Minor


The behaviour of listFilesAndDirs is quite unexpected in my opinion.

FileUtils.listFiles searches for files in a directory, where the files match the filter, including the subdirectories which are matched by the dirFilter.
FileUtils.listFilesAndDirs searches for files and directories, where the files match the filter and the directories match the directory filter, including the subdirectories which are matched by the dirFilter.

But, if one extends the listFiles-method, the logical behaviour would be:
FileUtils.listFiles searches for files and directories in a directory, where the files and directories match the filter, including the subdirectories which are matched by the dirFilter.

This method has been discussed in https://issues.apache.org/jira/browse/IO-328, but there the point was, that listFilesAndDirs also includes the root folder, which was documented correctly after this bug. In my opinion, the problem not the inclusion of the root filter but the different behaviour from the listFiles-method. 

I apply an patch, where the method filters everything with the first filter and includes subdirectories if they are included by the dirFilter. One could also keep the current method, but imho it then should be named different as it behaves different than listFiles (maybe filterFilesAndDirs?). 



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