/// <summary> Expert: Constructs and initializes a Weight for a top-level query.</summary> public virtual Weight Weight(Searcher searcher, IState state) { Query query = searcher.Rewrite(this, state); Weight weight = query.CreateWeight(searcher, state); float sum = weight.GetSumOfSquaredWeights(); float norm = GetSimilarity(searcher).QueryNorm(sum); if (float.IsInfinity(norm) || float.IsNaN(norm)) { norm = 1.0f; } weight.Normalize(norm); return(weight); }
public void CreateSpatialFilterAndWeight(PointRadiusCriterion geoFilter, Filter currentFilter, Weight currentWeight) { var spatialContext = SpatialContext.GEO; var geohashTree = new GeohashPrefixTree(spatialContext, 10); var strategy = new RecursivePrefixTreeStrategy(geohashTree, geoFilter.FieldName); var point = spatialContext.MakePoint(geoFilter.Longitude, geoFilter.Latitude); var spatialArgs = new SpatialArgs(SpatialOperation.Intersects, spatialContext.MakeCircle(point, DistanceUtils.Dist2Degrees(geoFilter.RadiusKm, DistanceUtils.EARTH_MEAN_RADIUS_KM))); var circle = spatialContext.MakeCircle(point, DistanceUtils.Dist2Degrees(geoFilter.RadiusKm, DistanceUtils.EARTH_MEAN_RADIUS_KM)); var circleCells = strategy.GetGrid().GetWorldNode().GetSubCells(circle); var luceneFilters = new List<Filter>(); if (currentFilter != null) luceneFilters.Add(currentFilter); var tempSpatial = strategy.MakeFilter(spatialArgs); luceneFilters.Add(tempSpatial); if (geoFilter.Sort != PointRadiusCriterion.SortOption.None) { var valueSource = strategy.MakeDistanceValueSource(point); var funcQ = new FunctionQuery(valueSource); // this is a bit odd... but boosting the score negatively orders results if (geoFilter.Sort == PointRadiusCriterion.SortOption.Ascending) { funcQ.Boost = -1; } spatialWeight = funcQ.CreateWeight(this); spatialWeight.GetSumOfSquaredWeights(); luceneFilters.Add(new QueryWrapperFilter(currentWeight.Query)); } spatialFilter = new ChainedFilter(luceneFilters.ToArray(), 1); }