HI,
Is there a way by using FacetCollector to get the result with numhits as 0.
Below is the code that I am using for facet search.
FacetsCollector facetCollector = new FacetsCollector();
FacetsCollector.search(searcher, drillDownQuery, limit, facetCollector);
Here if we pass limit as 0 then we get error as "numHits must be > 0; please
use TotalHitCountCollector if you just need the total hit count"
So in order to have this fix I changed the code like
FacetsCollector facetCollector = new FacetsCollector();
TopDocs topDocs = null;
TotalHitCountCollector totalHitCountCollector = null;
if (limit == 0) {
totalHitCountCollector = new TotalHitCountCollector();
topDocs = FacetsCollector.search(st.searcher, filterQuery, first +
limit,
MultiCollector.wrap(totalHitCountCollector, facetCollector));
} else
topDocs = FacetsCollector.search(st.searcher, filterQuery, first +
limit,
facetCollector);
But there is difference in output when limit is 0 and limit is greater than
0.
E.g. if we provide facet filter which does not fetch any record then for
limit greater than 0 which uses FacetCollector search we do not get any
facet information since result is not returned.
But for limit=0 we get facet information even though the result is not
present.
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