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From "James Ring (JIRA)" <>
Subject [jira] Commented: (IO-172) Support directory scanning based on Ant-like include/exclude patterns
Date Tue, 27 Apr 2010 18:51:33 GMT


James Ring commented on IO-172:

This is just like
except it's ugly and my hands hurt just looking at the example code above.

Nicer would be something like:

import static*;

scanDirectory(and(suffix(".xml"), not(name("bad"))));

> Support directory scanning based on Ant-like include/exclude patterns
> ---------------------------------------------------------------------
>                 Key: IO-172
>                 URL:
>             Project: Commons IO
>          Issue Type: New Feature
>          Components: Utilities
>    Affects Versions: 1.4
>            Reporter: Benjamin Bentmann
>             Fix For: 2.x
> While IO offers a rich set of {{IOFileFilters}} for finding files in directories, I feel
it's missing a concept similar to Ant's file sets. For example, how would one search for files
that match "**/*.xml" but that don't match "bad/**"? The sketched example would require to
exclude the directory "bad" but only if it is the first component of the path, something like
"foo/bad/bar.xml" still needs to be included.
> Given the increased flexibility of [Ant-like patterns|],
it would be cool to have something similar to Ant's [{{DirectoryScanner}}|]
available in Commons IO.
> Personally, I wouldn't need a full copy of the mentioned class, I believe some method
> {code:java}
> Collection<String> scanDirectory(File dir, Collection<String> includes, Collection<String>
> {code}
> in {{FileUtils}} would just suffice. Some default excludes like SCM metadata files could
be provided as a public static final and unmodifiable string collection. The return value
should include path names relative to the base directory instead of absolute paths (it's easy
for the caller to resolve the files against the base directory but it's error-prone to relativize
absolute paths).

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