While it might very well be a good idea to make the Perl regexps available to other languages via your own API I don't think the implementation is reasonable. Not only that it's going to be slow, it's going to be dangerous as well. Keep in mind that the Perl regexps may contain embedded Perl code. As may unless you are very carefull the replacement string. So this would allow anyone with access to the server to run any Perl code on the server with the permissions of the server process. Not too good I'd say.

You should find some other way to connect the Perl with the other languages. I did not like the Regexp object provided with VBScript so I wrote a COM wrapper of the Perl regexps providing an API I like, you may try to do something similar for Java. Or use mine if you happen to need this only under Windows.