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From "Jaap Taal (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENENET-394) AnonymousClassScoreDocComparator throws nullreferenceexception
Date Fri, 11 Feb 2011 13:38:57 GMT
AnonymousClassScoreDocComparator throws nullreferenceexception
--------------------------------------------------------------

                 Key: LUCENENET-394
                 URL: https://issues.apache.org/jira/browse/LUCENENET-394
             Project: Lucene.Net
          Issue Type: Bug
         Environment: Lucene.NET 2.4.0.2
            Reporter: Jaap Taal
            Priority: Blocker


I've added a field to my index (Store.NO, Index.UN_TOKENIZED), I've updated a couple of my
documents and I'm now sorting on it (after I collected document id's in a HitCollector). My
search results in some documents that consist of document with the field and without.

I use a simple implementation of SortComparator which implements GetComparable by just returning
the passed termtext.

I've set a breakpoint at my GetComparable method and I see the correct values (the method
is NOT called for documents that don't have the field as a value).


When SortComparer.Compare is called, a NullReferenceException occurs in:

{code}
public virtual int Compare(ScoreDoc i, ScoreDoc j)
{
    return this.cachedValues[i.doc].CompareTo(this.cachedValues[j.doc]);
}
{code}

The expression this.cachedValues[i.doc] is null.



Is this a limitation of SortComparer (and its AnonymousClassScoreDocComparator) that all documents
in a searchresult need to have a value for the field??

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