GeoHashFilteredDocIdSet does not work at all
--------------------------------------------
Key: LUCENENET-448
URL: https://issues.apache.org/jira/browse/LUCENENET-448
Project: Lucene.Net
Issue Type: Bug
Components: Lucene.Net Contrib
Affects Versions: Lucene.Net 2.9.4
Environment: Windows 7 x64
Reporter: Jeff Johnson
Fix For: Lucene.Net 2.9.4
The GeoHashFilteredDocIdSet is assuming the values are always in the cache
which is wrong. A proposed fix for the method is listed here for
GeoHashDistanceFilter.cs:
public GeoHashFilteredDocIdSet(DocIdSet innerSet, string[] geoHashValues,
Dictionary<string, double> distanceLookupCache, double lat, double lng, int
docBase, double distance, Dictionary<int, double> distances)
: base(innerSet , (docid) => /* was: public override Match */
{
String geoHash = geoHashValues[docid];
double[] coords = GeoHashUtils.Decode(geoHash);
double x = coords[0];
double y = coords[1];
double cachedDistance;
distanceLookupCache.TryGetValue(geoHash, out cachedDistance);
double d;
if (cachedDistance > 0)
{
d = cachedDistance;
}
else
{
d =
DistanceUtils.GetInstance().GetDistanceMi(lat, lng, x, y);
distanceLookupCache[geoHash] = d;
}
if (d < distance)
{
distances[docid + docBase] = d;
return true;
}
return false;
})
{
_geoHashValues = geoHashValues;
_distances = distances;
_distance = distance;
_docBase = docBase;
_lng = lng;
_lat = lat;
_distanceLookupCache = distanceLookupCache;
}
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