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https://issues.apache.org/jira/browse/SOLR-3017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13200085#comment-13200085
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Michael Dodsworth commented on SOLR-3017:
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That would certainly allow us to hack around the problem in a way that doesn't
require a change to the query parser (i.e., extending StopFilterFactory and
overriding its create method to return our own filter).
Are we concerned about breaking code that may be calling
StopFilterFactory.create() and is expecting a StopFilter (I wonder if there's a
reason TokenStream wasn't used originally)?
Agreed on the inaccurate param name. I'll fix that up in the next patch.
Specifying the factory class name as a param *is* optional and, as you say,
should be a rare case.
If there's a better, more general fix for this, I'm happy to take that on.
> Allow edismax stopword filter factory implementation to be specified
> --------------------------------------------------------------------
>
> Key: SOLR-3017
> URL: https://issues.apache.org/jira/browse/SOLR-3017
> Project: Solr
> Issue Type: Improvement
> Affects Versions: 4.0
> Reporter: Michael Dodsworth
> Priority: Minor
> Fix For: 4.0
>
> Attachments: SOLR-3017-without-guava-alternative.patch,
> SOLR-3017.patch, SOLR-3017.patch, edismax_stop_filter_factory.patch
>
>
> Currently, the edismax query parser assumes that stopword filtering is being
> done by StopFilter: the removal of the stop filter is performed by looking
> for an instance of 'StopFilterFactory' (hard-coded) within the associated
> field's analysis chain.
> We'd like to be able to use our own stop filters whilst keeping the edismax
> stopword removal goodness. The supplied patch allows the stopword filter
> factory class to be supplied as a param, "stopwordFilterClassName". If no
> value is given, the default (StopFilterFactory) is used.
> Another option I looked into was to extend StopFilterFactory to create our
> own filter. Unfortunately, StopFilterFactory's 'create' method returns
> StopFilter, not TokenStream. StopFilter is also final.
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