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From Erik Hatcher <>
Subject Re: regex queries
Date Wed, 28 Dec 2005 16:19:58 GMT

On Dec 28, 2005, at 10:14 AM, Erik Hatcher wrote:

> As I promised earlier, in order to leverage 3rd party regex  
> implementations I have removed the (Span)RegexQuery code from the  
> core and into contrib/regex.  The implementation is vastly  
> different in that I've abstracted out the regex implementation and  
> provided one for JDK 1.4 java.util.regex and Jakarta Regexp.   
> Jakarta Regexp has a nice feature of being able to provide the  
> static prefix in order to short-circuit term enumeration.  In my  
> project, I've created a custom implementation that uses Jakarta  
> Regexp for the prefix but java.util.regex for the actual matching  
> in order to have the best of both worlds.
> I may have over-engineered it a bit, though I'm not sure.  I'm in  
> the process of documenting beyond just the unit tests, and likely  
> will also document how to use regex queries along with term  
> rotation in order to really minimize term rotation - though I'm  
> still working on this feature in my current project.

Oops... typo.... "to really minimize term _enumeration_"

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