Hi,
I'm using SOLR and Lucene in my application for search.
I'm facing an issue of highlighting using FastVectorHighlighter not working
when I use PayloadTermQueries as clauses of a BooleanQuery.
After Debugging I found that In DefaultSolrHighlighter.Java,
fvh.getFieldQuery does not return any term in the termMap.
FastVectorHighlighter fvh = new FastVectorHighlighter(
// FVH cannot process hl.usePhraseHighlighter parameter per-field
basis
params.getBool( HighlightParams.USE_PHRASE_HIGHLIGHTER, true ),
// FVH cannot process hl.requireFieldMatch parameter per-field basis
params.getBool( HighlightParams.FIELD_MATCH, false ) );
*FieldQuery fieldQuery = fvh.getFieldQuery( query );*
The reason of empty termmap is, PayloadTermQuery is discarded while
constructing the FieldQuery.
void flatten( Query sourceQuery, Collection<Query> flatQueries ){
if( sourceQuery instanceof BooleanQuery ){
BooleanQuery bq = (BooleanQuery)sourceQuery;
for( BooleanClause clause : bq.getClauses() ){
if( !clause.isProhibited() )
flatten( clause.getQuery(), flatQueries );
}
}
else if( sourceQuery instanceof DisjunctionMaxQuery ){
DisjunctionMaxQuery dmq = (DisjunctionMaxQuery)sourceQuery;
for( Query query : dmq ){
flatten( query, flatQueries );
}
}
else if( sourceQuery instanceof TermQuery ){
if( !flatQueries.contains( sourceQuery ) )
flatQueries.add( sourceQuery );
}
else if( sourceQuery instanceof PhraseQuery ){
if( !flatQueries.contains( sourceQuery ) ){
PhraseQuery pq = (PhraseQuery)sourceQuery;
if( pq.getTerms().length > 1 )
flatQueries.add( pq );
else if( pq.getTerms().length == 1 ){
flatQueries.add( new TermQuery( pq.getTerms()[0] ) );
}
}
}
// else discard queries
}
What is the best way to get highlighting working with Payload Term Queries?
Thanks
Nitin
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