I tried something similar, and failed - I think the API is lacking
there? My only advice is to vote for this:
https://issues.apache.org/jira/browse/LUCENE-2878 which should provide
an alternative better API, but it's not near completion.
-Mike
On 7/6/2011 5:34 PM, Jahangir Anwari wrote:
I have a CustomHighlighter that extends the SolrHighlighter and overrides
the doHighlighting() method. Then for each document I am trying to extract
the span terms so that later I can use it to get the span Positions. I tried
to get the weightedSpanTerms using WeightedSpanTermExtractor but was
unsuccessful. Below is the code that I am have. Is there something missing
that needs to be added to get the span terms?
// in CustomHighlighter.java
@Override
public NamedList doHighlighting(DocList docs, Query query, SolrQueryRequest
req, String[] defaultFields) throws IOException {
NamedList highlightedSnippets = super.doHighlighting(docs, query, req,
defaultFields);
IndexReader reader = req.getSearcher().getIndexReader();
String[] fieldNames = getHighlightFields(query, req, defaultFields);
for (String fieldName : fieldNames)
{
QueryScorer scorer = new QueryScorer(query, null);
scorer.setExpandMultiTermQuery(true);
scorer.setMaxDocCharsToAnalyze(51200);
DocIterator iterator = docs.iterator();
for (int i = 0; i< docs.size(); i++)
{
int docId = iterator.nextDoc();
System.out.println("DocId: " + docId);
TokenStream tokenStream = TokenSources.getTokenStream(reader, docId,
fieldName);
WeightedSpanTermExtractor wste = new WeightedSpanTermExtractor(fieldName);
wste.setExpandMultiTermQuery(true);
wste.setWrapIfNotCachingTokenFilter(true);
Map<String,WeightedSpanTerm> weightedSpanTerms =
wste.getWeightedSpanTerms(query, tokenStream, fieldName); // this is always
empty
System.out.println("weightedSpanTerms: " + weightedSpanTerms.values());
}
}
return highlightedSnippets;
}
Thanks,
Jahangir
---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-user-h...@lucene.apache.org
