Ok, glossing over some of the details was not the best idea. ms is a
MultiSearcher in that it's something I wrote that extends MultiSearcher. And
this part I should have mentioned before, the explain method being called is
the one in org.apache.lucene.search.Searcher. So explain is
public Explanation explain(Query query, int doc) throws IOException {
return explain(createWeight(query), doc);
}
I've verified that I am in fact calling the explain method that I think I am.
Here's the full stack trace:
java.lang.UnsupportedOperationException
at org.apache.lucene.search.Query.extractTerms(Query.java:163)
at org.apache.lucene.search.BooleanQuery.extractTerms(BooleanQuery.java:425)
at
org.apache.lucene.search.MultiSearcher.createWeight(MultiSearcher.java:292)
at org.apache.lucene.search.Searcher.explain(Searcher.java:143)
at
com.testing.documentationsearch.DocumentationSearcher.search(DocumentationSearcher.java:197)
at
com.testing.documentationsearch.DocumentationSearcher.search(DocumentationSearcher.java:42)
at com.testing.documentationsearch.Test.main(Test.java:6)
So we reach a problem at extractTerms. I get an explanation no problem if I do
not include the FunctionQuery in my BooleanQuery, so I can't see how this isn't
related in some way to FunctionQuery. Stepping through my code, I can see that
the extractTerms in BooleanQuery
public void extractTerms(Set terms) {
for (Iterator i = clauses.iterator(); i.hasNext();) {
BooleanClause clause = (BooleanClause) i.next();
clause.getQuery().extractTerms(terms);
}
}
goes swimmingly until the clause is the FunctionQuery clause. extractTerms is
being called on LinearFloatFunction:1.0*float(int(num))+1.0)^1.0, and that is
where the UnsupportedOperationException occurs.
So it seems to me like there's something simple here I'm missing. I've used the
FunctionQuery as part of a BooleanQuery, which is the advice I found searching
this list. Am I not using it correctly in the BooleanQuery? Here is the code I
sent previously:
Query query = parser.parse(newCriteria);
LinearFloatFunction lff = new LinearFloatFunction(new
IntFieldSource("num"), 1.0f, 1.0f);
FunctionQuery fQ = new FunctionQuery(lff);
BooleanQuery bQ = new BooleanQuery();
bQ.add(query, BooleanClause.Occur.MUST);
bQ.add(fQ, BooleanClause.Occur.SHOULD);
I'm using the version of FunctionQuery from the JIRA attachment.
I appreciate your input, and I would be very grateful for any other insight you
could offer. I am eager to get this working!
Thanks again,
Ann
----- Original Message ----
From: Chris Hostetter <[EMAIL PROTECTED]>
To: java-user@lucene.apache.org
Sent: Thursday, April 5, 2007 4:58:30 PM
Subject: Re: Explanation from FunctionQuery
1) which version of FunctionQuery are you using (from the solr repository
or from a Jira issue attachment?)
2) what is hte full stacktrace? (ie: which function/line is throwing the
Exception)
FunctionQuery supports explain just fine, not sure why you'd have
problems, oh wait ... i see exactly what hte problem is...
: The ms is a MultiSearcher. I read that
...this is the implemnetation for MultiSearcher...
public Explanation explain(Weight weight,int doc) {
throw new UnsupportedOperationException();
}
...it's got nothing to do with FunctionQuery.
-Hoss
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