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From Alex Botin <opt_...@yahoo.fr>
Subject Problem using highlighter package
Date Tue, 17 Feb 2004 22:16:30 GMT
Hi there !
 
I downloaded the highlighter package made available by Mark Hardwood on :
http://home.clara.net/markharwood/lucene/highlight.htm
 
I followed the instructions given on this site to use the package, but when I try to run my
application, I get the following message :
" Method rewrite(org.apache.lucene.index.IndexReader)
not found in class org.apache.lucene.search.Query.query = query.rewrite(reader); "
 
Then, if I remove the instruction "query = query.rewrite(reader);", I get another NoSuchMethodError
for org.apache.lucene.search.TermQuery.getTerm()
 
(A piece of my source code is at the end of this message)
 
Does anybody have a clue to solve my problem ?
And by the way, can somebody explain me what the query.rewrite() function is used for exactly
?

I thank you all in advance.
Alex.
 
 ...
 import org.apache.lucene.index.*;
 import org.apache.lucene.search.*;
 import org.apache.lucene.search.highlight.*;
 ...
 IndexReader reader = IndexReader.open(indexName);
 searcher = new IndexSearcher( reader );
 Analyzer analyzer = new FrenchAnalyzer();
 
 query = QueryParser.parse(queryString, "contents", analyzer);
 query = query.rewrite(reader);
 
 QueryHighlightExtractor highlighter = 
    new QueryHighlightExtractor(query, new FrenchAnalyzer(),
       "<font style=\"background:yellow;\">", "</font>");
 
 int highlightFragmentSizeInBytes = 80;
 int maxNumFragmentsRequired = 4;
 String fragmentSeparator="...";
 
 String highlightedSummary =
   highlighter.getBestFragments(summary, highlightFragmentSizeInBytes,
      maxNumFragmentsRequired, fragmentSeparator);
 
For information, I added
 C:\Projets\Lucene\lib\highlighter.jar
 C:\Projets\Lucene\lib\lucene-1.3-final.jar
 C:\Projets\Lucene\lib\lucene-demos-1.3-final.jar
to my classpath.


		
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