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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