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From Koji Sekiguchi <k...@r.email.ne.jp>
Subject Re: Looking for a MappingCharFilter that accepts regular expressions
Date Sun, 13 Dec 2009 17:04:14 GMT
Paul Taylor wrote:
> I want my search to treat 'No. 1' and 'No.1' the same, because in our 
> context its one token I want 'No. 1' to become 'No.1',  I need to do 
> this before tokenizing because the tokenizer would split one value 
> into two terms and one into just one term. I already use a 
> NormalizeMapFilter to map &' to 'and' but I think it only takes 
> literal text and I need to
>
> 1. be case insensitive (but lowercasefilter is only applied after 
> tokenizing)
>
> 2. cope with all numbers e.g no. 109
>
> So I was going to subclass BaseCharFilter and do my matches with a 
> regular expression like ([Nn]+[Oo]+\\.) ([0-9]+) but I'm struggling to 
> understand the offset methods you have to do once you get a match. Has 
> anyone already got a regular expression Charfilter OR am I approaching 
> this all wrong
>
> thanks Paul
>
>
>
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>
Hi Paul,

I've written a patch for this kind of purpose. See:

https://issues.apache.org/jira/browse/SOLR-1653

Koji

-- 
http://www.rondhuit.com/en/


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