[jira] Commented: (IO-89) Inconsistency in SizeFileFilter and AgeFileFilter implementations

["Rahul Akolkar (JIRA)" <ji...@apache.org>]

    [ http://issues.apache.org/jira/browse/IO-89?page=comments#action_12423130 ] 
            
Rahul Akolkar commented on IO-89:
---------------------------------

Agreed, thanks for your time. My only comment is since FileUtils.isFileNewer/Older are exclusive, perhaps we should have SizeFileFilter be exclusive as well (so < instead of <= etc.), that way there is consistency across filters as well.


> Inconsistency in SizeFileFilter and AgeFileFilter implementations
> -----------------------------------------------------------------
>
>                 Key: IO-89
>                 URL: http://issues.apache.org/jira/browse/IO-89
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Filters
>    Affects Versions: 1.2
>            Reporter: Niall Pemberton
>            Priority: Minor
>             Fix For: 1.3
>
>
> Theres an inconsistency (bug?) in the implementation of SizeFileFilter and AgeFileFilter.
> In SizeFileFilter, using an "acceptLarger" parameter of true actually accepts files with a size equal to and larger, whereas
> specifying an "acceptLarger" parameter of false only accepts smaller files.
> The same is true for AgeFileFilter, using an "acceptOlder" parameter of true actually accepts files either the same age or older, whereas
> specifying an "acceptOlder" parameter of false only accepts newer files.
> A big benefit of resolving these inconsistencies would mean that creating filters for any condition (i.e. <, >, <=, >= or =) becomes
> alot easier. For example if the AgeFileFilter did only do either newer or older, then creating a filters for "the same age or older"
> or "the same age or younger" could be done in the following way:
>     IOFileFilter equalOlder   = new NotFileFilter(new AgeFileFilter(cutoff, false));
>     IOFileFilter equalYounger = new NotFileFilter(new AgeFileFilter(cutoff, true));
> For SizeFileFilter I propose changing the logic to the following:
>     if (acceptLarger) {
>         return file.length() >= size;
>     } else {
>         return file.length() <= size;
>     }
> (This would mean that "new SizeFileFilter(cutoff)" would operate the same way)
> I have added isOlderFile() methods to FileUtils and propose that AgeFileFilter is changed to the following:
>     if (acceptOlder) {
>         return FileUtils.isFileOlder(file, cutoff);
>     } else {
>         return FileUtils.isFileNewer(file, cutoff);
>     }

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