ReversedWildcardFilterFactory and PorterStemFilterFactory

[Jamie Johnson <je...@gmail.com>]

I'd like to use both the ReversedWildcardFilterFactory and
PorterStemFilterFactory on a text field that I have, I'd like to avoid
stemming the reversed fields and would also like to avoid reversing
the stemmed fields.  My original thought was to have the
ReversedWildcardFilterFactory higher in the chain, but what would this
do with the stemmer?  Would it attempt o stem the reversed tokens or
are they ignored?  What is the best way to achieve the result I am
looking for in a single field?

Again goal is to have text come in have it be reversed and stemmed but
I don't want the stemmed reversed and I don't want the reversed
stemmed, is this possible?

Re: ReversedWildcardFilterFactory and PorterStemFilterFactory

[Erick Erickson <er...@gmail.com>]

The analysis chains are exactly that, chains. They really don't
have a way to skip things in a context-sensitive way.

So if you stem first, the stemmed stuff gets reversed and
vice-versa.

Are you sure that stemming then reversing is a bad solution?
What's the use case that this is bad for?

Otherwise, I think you're into custom filter land, so it's a question
whether the use case is worth the effort I think.

Best
Erick

On Fri, Feb 3, 2012 at 6:50 PM, Jamie Johnson <je...@gmail.com> wrote:
> I'd like to use both the ReversedWildcardFilterFactory and
> PorterStemFilterFactory on a text field that I have, I'd like to avoid
> stemming the reversed fields and would also like to avoid reversing
> the stemmed fields.  My original thought was to have the
> ReversedWildcardFilterFactory higher in the chain, but what would this
> do with the stemmer?  Would it attempt o stem the reversed tokens or
> are they ignored?  What is the best way to achieve the result I am
> looking for in a single field?
>
> Again goal is to have text come in have it be reversed and stemmed but
> I don't want the stemmed reversed and I don't want the reversed
> stemmed, is this possible?