Can I get some sense of use case? What would you use it for? Just curious.
On Fri, Oct 8, 2010 at 9:06 AM, Stephen Colebourne <scolebou...@joda.org> wrote:
> I don't think comons lang has a routine for converting a standard
> wildcard string (with * and ?) to a regex.
> Here is a first suggestion, although I'm sure it can be improved.
>
> public Pattern createPattern(String text) {
> StringTokenizer tkn = new StringTokenizer(text, "?*", true);
> StringBuilder buf = new StringBuilder(text.length() + 10);
> buf.append('^');
> boolean lastStar = false;
> while (tkn.hasMoreTokens()) {
> String str = tkn.nextToken();
> if (str.equals("?")) {
> buf.append('.');
> lastStar = false;
> } else if (str.equals("*")) {
> if (lastStar == false) {
> buf.append(".*");
> }
> lastStar = true;
> } else {
> buf.append(Pattern.quote(str));
> lastStar = false;
> }
> }
> buf.append('$');
> return Pattern.compile(buf.toString(), Pattern.CASE_INSENSITIVE);
> }
>
> Other possile conversions would be * and ? to databse wildcards, so
> perhaps there is scope for a few related methods here?
>
> Stephen
>
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