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From "jm (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-556) MatchAllDocsQuery, MultiSearcher and a custom HitCollector throwing exception
Date Thu, 27 Apr 2006 16:39:38 GMT
    [ http://issues.apache.org/jira/browse/LUCENE-556?page=comments#action_12376758 ] 

jm commented on LUCENE-556:
---------------------------

I used a custom version and my queries work now, but I am not sure wether this is ok...it's
mostly an easy shot I took:

public class LuceneMatchAllDocsCustomQuery extends  MatchAllDocsQuery {
    public void extractTerms(Set terms) {
      }
}

> MatchAllDocsQuery, MultiSearcher and a custom HitCollector throwing exception
> -----------------------------------------------------------------------------
>
>          Key: LUCENE-556
>          URL: http://issues.apache.org/jira/browse/LUCENE-556
>      Project: Lucene - Java
>         Type: Bug

>   Components: Search
>     Versions: 1.9
>  Environment: xp sp2, jdk1.5
>     Reporter: jm
>     Priority: Minor

>
> I have encountered an issue with lucene1.9.1. It involves MatchAllDocsQuery, MultiSearcher
and a custom HitCollector. The following code throws  java.lang.UnsupportedOperationException.
> If I remove the MatchAllDocsQuery  condition (comment whole //1 block), or if I dont
use the custom hitcollector (ms.search(mbq); instead of ms.search(mbq, allcoll);) the exception
goes away. By stepping into the source I can see it seems due to MatchAllDocsQuery no implementing
extractTerms()....
>            Searcher searcher = new
> IndexSearcher("c:\\projects\\mig\\runtime\\index\\01Aug16\\");
>            Searchable[] indexes = new IndexSearcher[1];
>            indexes[0] = searcher;
>            MultiSearcher ms = new MultiSearcher(indexes);
>            AllCollector allcoll = new AllCollector(ms);
>            BooleanQuery mbq = new BooleanQuery();
>            mbq.add(new TermQuery(new Term("body", "value1")),
> BooleanClause.Occur.MUST_NOT);
> // 1
>            MatchAllDocsQuery alld = new MatchAllDocsQuery();
>            mbq.add(alld, BooleanClause.Occur.MUST);
> //
>            System.out.println("Query: " + mbq.toString());
>            // 2
>            ms.search(mbq, allcoll);
>            //ms.search(mbq);

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