public override Task <IFeatureCursor> GetFeatures(IQueryFilter filter)
{
string queryUrl = $"{ _dataaset.ServiceUrl() }/{ this.ID }/query?f=json";
string geometryType = String.Empty, geometry = String.Empty;
int outSrefId = (filter.FeatureSpatialReference != null) ? filter.FeatureSpatialReference.EpsgCode : 0,
inSrefId = 0;
// Bitte nicht ändern -> Verursacht Pagination Error vom AGS und Performance Problem wenn daten im SQL Spatial liegen
string featureLimit = String.Empty; //(filter.FeatureLimit <= 0 ? "" : filter.FeatureLimit.ToString());
string separatedSubFieldsString = String.IsNullOrWhiteSpace(filter.SubFields) ? "*" : filter.SubFields.Replace(" ", ",");
if (filter is SpatialFilter)
{
var sFilter = (SpatialFilter)filter;
inSrefId = sFilter.FilterSpatialReference != null ? sFilter.FilterSpatialReference.EpsgCode : 0;
if (sFilter.Geometry is IPoint)
{
geometry = RestHelper.ConvertGeometryToJson(((Point)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Point)sFilter.Geometry));
}
else if (sFilter.Geometry is IMultiPoint)
{
geometry = RestHelper.ConvertGeometryToJson(((MultiPoint)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((MultiPoint)sFilter.Geometry));
} // TODO - if needed
else if (sFilter.Geometry is IPolyline)
{
geometry = RestHelper.ConvertGeometryToJson(((Polyline)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Polyline)sFilter.Geometry));
}
else if (sFilter.Geometry is IPolygon)
{
geometry = RestHelper.ConvertGeometryToJson(((Polygon)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Polygon)sFilter.Geometry));
}
else if (sFilter.Geometry is IEnvelope)
{
geometry = RestHelper.ConvertGeometryToJson(((Envelope)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Envelope)sFilter.Geometry));
}
else
{
}
}
string where = filter.WhereClause;
// is always set in featurecursor
//string orderBy = this.IDFieldName;
var postBodyData = new StringBuilder();
postBodyData.Append($"&geometry={ geometry }&geometryType={ geometryType }&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=");
postBodyData.Append($"&time=&maxAllowableOffset=&outFields={ separatedSubFieldsString }&resultRecordCount={ featureLimit }&f=pjson");
postBodyData.Append($"&returnCountOnly=false&returnIdsOnly=false&returnGeometry={ true }");
return(Task.FromResult <IFeatureCursor>(
new GeoServicesFeatureCursor(_dataaset, this, queryUrl, postBodyData.ToString(), where)));
}