Jakarta previously hosted ORO, a set of text-processing Java classes that provide Perl5 compatible regular expressions, AWK-like regular expressions, glob expressions, and utility classes for performing substitutions, splits, filtering filenames, etc.
As there were no new features or releases planned, the Jakarta ORO project was retired in September 2010.
ORO users are encouraged to use similar features in newer Java versions, where available.
The old ORO website is available online here for archival purposes only.
Archived versions of ORO may be downloaded from the Apache Archives.