public RecursivePrefixTreeStrategyDistanceCustomScoreQuery(Query subQuery, RecursivePrefixTreeStrategy strategy, Point origin, String shapeField)
: base(subQuery)
{
_strategy = strategy;
_origin = origin;
_cacheProvider = new PointPrefixTreeFieldCacheProvider(_strategy.GetGrid(), shapeField, 255);
}
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);
}
public object ComputeFieldValue(Sitecore.ContentSearch.IIndexable indexable)
{
var indexableItem = indexable as SitecoreIndexableItem;
if (indexableItem == null)
{
return(null);
}
var item = (Sitecore.Data.Items.Item)indexableItem;
if (item == null)
{
return(null);
}
var latLon = item[SourceFieldName];
if (latLon == "" || latLon == "NULL")
{
return(null);
}
// Convert from georss point to normal X, Y format
latLon = latLon.Replace(" ", ", ");
var spatialContext = SpatialContext.GEO;
var geohashTree = new GeohashPrefixTree(spatialContext, 10);
var strategy = new RecursivePrefixTreeStrategy(geohashTree, FieldName);
var shape = spatialContext.ReadShape(latLon);
var grid = strategy.GetGrid();
int levelForDistance = grid.GetLevelForDistance(strategy.DistErrPct);
IList <Node> list = grid.GetNodes(shape, levelForDistance, true);
return(list.Select(node => node.GetTokenString()));
}
