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From "Hoss Man (JIRA)" <>
Subject [jira] [Created] (LUCENE-3395) FreqFilteringScorerWrapper and min/max freq options on TermQuery
Date Mon, 22 Aug 2011 18:01:30 GMT
FreqFilteringScorerWrapper and min/max freq options on TermQuery

                 Key: LUCENE-3395
             Project: Lucene - Java
          Issue Type: New Feature
            Reporter: Hoss Man

A Solr User was asking about how specify a minimum tf when searching for a term (ie: documents
matching "dog" at least 3 times).

Based on a conversation with rmuir on IRC, that led me to realize that we now explicitly expose
a general "freq()" method on Scorer, and that min/max freq constraints could be implemented
as a general Scorer Wrapper.

I propose that we add such a wrapper, and add setMinFreq(float)/setMaxFreq(float) methods
to TermQuery (similar to the minNumShouldMatches and disableCoord type setters in BooleanQuery)
that cause it to be used automatically.

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