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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-4514) Make Scorer.freq() well defined: number of matches in doc
Date Tue, 30 Oct 2012 11:56:13 GMT
Robert Muir created LUCENE-4514:
-----------------------------------

             Summary: Make Scorer.freq() well defined: number of matches in doc
                 Key: LUCENE-4514
                 URL: https://issues.apache.org/jira/browse/LUCENE-4514
             Project: Lucene - Core
          Issue Type: Task
          Components: core/query/scoring
            Reporter: Robert Muir


Today Scorer.freq() is somewhat useless: because in general it returns the number of matches,
but other times it returns a strange floating point value (essentially an intermediate score).

I think it should just return the number of matches in the document. This makes it well-defined
and useful to consumers (e.g. if they are going to iterate over the positions or whatever
in the future).

{noformat}
   /** Returns number of matches for the current document.
-   *  This returns a float (not int) because
-   *  SloppyPhraseScorer discounts its freq according to how
-   *  "sloppy" the match was.
    *
    * @lucene.experimental */
-  public abstract float freq() throws IOException;
+  public abstract int freq() throws IOException;
{noformat}


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