/// <summary>
/// Adds the features retrieved from cache to the receiver.
/// </summary>
/// <param name="processAttributes">A value indicating whether the attributes will be processed or not</param>
/// <param name="cacheAccessor">Cache accessor instance</param>
/// <param name="fr">An object that receives the retrieved features</param>
/// <param name="bounds">Rectangle that defines a query region</param>
/// <returns>Number of retrieved features</returns>
public static int FillFromCache(IFeatureCollectionCacheAccessor cacheAccessor, IFeatureReceiver fr, BoundingRectangle bounds, bool processAttributes)
{
ISpatialIndex pointsIndex = cacheAccessor.RestoreFeaturesIndex(MapAround.Mapping.FeatureType.Point);
ISpatialIndex polylinesIndex = cacheAccessor.RestoreFeaturesIndex(MapAround.Mapping.FeatureType.Polyline);
ISpatialIndex polygonsIndex = cacheAccessor.RestoreFeaturesIndex(MapAround.Mapping.FeatureType.Polygon);
BoundingRectangle b;
if (!bounds.IsEmpty())
{
b = bounds.GetBoundingRectangle();
}
else
{
b = new BoundingRectangle();
b.Join(pointsIndex.IndexedSpace);
b.Join(polylinesIndex.IndexedSpace);
b.Join(polygonsIndex.IndexedSpace);
}
List <Feature> points = new List <Feature>();
pointsIndex.QueryObjectsInRectangle(bounds, points);
List <Feature> polylines = new List <Feature>();
polylinesIndex.QueryObjectsInRectangle(bounds, polylines);
List <Feature> polygons = new List <Feature>();
polygonsIndex.QueryObjectsInRectangle(bounds, polygons);
points.ForEach(point => fr.AddFeature((Feature)point.Clone()));
polylines.ForEach(polyline => fr.AddFeature((Feature)polyline.Clone()));
polygons.ForEach(polygon => fr.AddFeature((Feature)polygon.Clone()));
if (processAttributes)
{
fr.FeatureAttributeNames.Clear();
IList <string> attributeNames = cacheAccessor.RestoreAttributeNames();
foreach (string s in attributeNames)
{
fr.FeatureAttributeNames.Add(s);
}
}
return(points.Count + polylines.Count + polygons.Count);
}
/// <summary>
/// Saves a spatial index containing features to the cache.
/// </summary>
/// <param name="index">Spatial index</param>
/// <param name="featureType">Type of features in index</param>
public void SaveFeaturesIndex(ISpatialIndex index, FeatureType featureType)
{
List <Feature> features = new List <Feature>();
lock (_syncRoot)
{
index.QueryObjectsInRectangle(index.IndexedSpace, features);
foreach (Feature s in features)
{
if (s.FeatureType != featureType)
{
throw new ArgumentException("Illegal feature type", "index");
}
}
AddOrReplaceIndex((ISpatialIndex)index.Clone(), featureType);
}
}
/// <summary>
/// Saves a spatial index containing features to the cache.
/// </summary>
/// <param name="index">Spatial index</param>
/// <param name="featureType">Type of features in index</param>
public void SaveFeaturesIndex(ISpatialIndex index, FeatureType featureType)
{
List<Feature> features = new List<Feature>();
lock (_syncRoot)
{
index.QueryObjectsInRectangle(index.IndexedSpace, features);
foreach (Feature s in features)
if (s.FeatureType != featureType)
throw new ArgumentException("Illegal feature type", "index");
AddOrReplaceIndex((ISpatialIndex)index.Clone(), featureType);
}
}
