On Mar 2, 2009, at 2:47 PM, Ken Williams wrote:
Finally, I seem unable to get Searcher.explain() to do much useful -
my code
looks like:
Searcher searcher = new IndexSearcher(reader);
QueryParser parser = new QueryParser(LuceneIndex.CONTENT,
analyzer);
Query query = parser.parse(queryString);
TopDocCollector collector = new TopDocCollector(n);
searcher.search(query, collector);
for ( ScoreDoc d : collector.topDocs().scoreDocs ) {
String explanation = searcher.explain(query,
d.doc).toString();
Field id =
searcher.doc( d.doc ).getField( LuceneIndex.ID );
System.out.println(id + "\t" + d.score + "\t" +
explanation);
}
In the output, I get explanations like "0.88922405 = (MATCH) product
of:"
with no details. Perhaps I need to do something different in
indexing?
Explanation.toString() only returns the first line. You can use
toString(int depth) or loop over all the getDetails(). toHtml()
returns a decently formatted tree of <ul>'s of the whole explanation
also.
Erik
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