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From "Otis Gospodnetic (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (LUCENE-304) [PATCH] add boost feature to MultiFieldQueryParser
Date Fri, 16 Jun 2006 05:24:30 GMT
     [ http://issues.apache.org/jira/browse/LUCENE-304?page=all ]
     
Otis Gospodnetic resolved LUCENE-304:
-------------------------------------

    Resolution: Duplicate
     Assign To:     (was: Lucene Developers)

I think this is a "duplicate" of LUCENE-544 .

> [PATCH] add boost feature to MultiFieldQueryParser
> --------------------------------------------------
>
>          Key: LUCENE-304
>          URL: http://issues.apache.org/jira/browse/LUCENE-304
>      Project: Lucene - Java
>         Type: Improvement

>   Components: QueryParser
>     Versions: 1.4
>  Environment: Operating System: other
> Platform: Other
>     Reporter: Nicolas Maisonneuve
>     Priority: Minor
>  Attachments: MultiFieldQueryParser.java
>
> add this feature
> (field1:query)^bfield1 (field2:query)^bfield12 (field3:query)^bfield3 ...
> (fieldx:query)^bfieldx
> Google Example: a user search "coco"  , my defaults search fields are title and
> description. But i would like boost title field more than description field to
> have results more relevant.
> Change in the MultiFieldQueryParser : add this method 
>   public static Query parse(String query, String[] fields, int[] flags, float []
> boost, Analyzer analyzer) throws ParseException {
>     {
>         BooleanQuery bQuery = new BooleanQuery();
>         for (int i = 0; i < fields.length; i++)
>         {
>             Query q = parse(query, fields[i], analyzer);
> ==>         q.setBoost(boost[i]);
>             int flag = flags[i];
>             switch (flag)
>             {
>                 case REQUIRED_FIELD:
>                     bQuery.add(q, BooleanClause.Occur.MUST);
>                     break;
>                 case PROHIBITED_FIELD:
>                     bQuery.add(q, BooleanClause.Occur.MUST_NOT);
>                     break;
>                 default:
>                     bQuery.add(q, BooleanClause.Occur.SHOULD);
>                     break;
>             }
>         }
>         return bQuery;
>     }
> }

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