async public Task <IFeature> NextFeature()
{
if (_edgeCursor == null && _edgeFcs != null && _edgeFcIndex < _edgeFcs.Count)
{
IFeatureClass fc = _edgeFcs[_edgeFcIndex++];
_fcid = await _fdb.FeatureClassID(await _fdb.DatasetID(fc.Dataset.DatasetName), fc.Name);
if (_fcid < 0)
{
return(await NextFeature());
}
if (fc.Name == _networkName + "_ComplexEdges")
{
_fcid = -1;
}
IQueryFilter f = (IQueryFilter)_filter.Clone();
if (f.SubFields != "*")
{
f.AddField(fc.IDFieldName);
f.AddField(fc.ShapeFieldName);
}
_edgeCursor = await fc.GetFeatures(f);
if (_edgeCursor == null)
{
return(await NextFeature());
}
}
if (_edgeCursor != null)
{
IFeature feature = await _edgeCursor.NextFeature();
if (feature != null)
{
feature.Fields.Add(new FieldValue("NETWORK#FCID", _fcid));
return(feature);
}
_edgeCursor.Dispose();
_edgeCursor = null;
return(await NextFeature());
}
if (_nodeCursor == null && _nodeFc != null)
{
_nodeCursor = await _nodeFc.GetFeatures(_filter);
}
if (_nodeCursor != null)
{
return(await _nodeCursor.NextFeature());
}
return(null);
}
async public Task <IFeatureCursor> GetFeatures(IQueryFilter filter)
{
if (filter is ISpatialFilter)
{
if (this.SpatialReference != null &&
((ISpatialFilter)filter).FilterSpatialReference != null &&
!((ISpatialFilter)filter).FilterSpatialReference.Equals(this.SpatialReference))
{
filter = (ISpatialFilter)filter.Clone();
((ISpatialFilter)filter).Geometry =
GeometricTransformerFactory.Transform2D(((ISpatialFilter)filter).Geometry,
((ISpatialFilter)filter).FilterSpatialReference,
this.SpatialReference);
((ISpatialFilter)filter).FilterSpatialReference = null;
}
}
if (_dataset.Source != null)
{
if (_dataset.Source.IsValid)
{
if (filter is DistinctFilter)
{
return(new GeoJsonDistinctFeatureCursor(await _dataset.Source?.GetFeatures(this.GeometryType), (DistinctFilter)filter));
}
return(new GeoJsonFeatureCursor(this, await _dataset.Source?.GetFeatures(this.GeometryType), filter));
}
else if (_dataset.Source.LastException != null)
{
throw new Exception(_dataset.Source.LastException.AllMessages());
}
}
// Dataset is not intializalized
return(new GeoJsonFeatureCursor(this, new IFeature[0], filter));
}
static public IQueryFilter AppendWhereClause(this IQueryFilter queryFilter, string appendFilter)
{
if (String.IsNullOrWhiteSpace(appendFilter))
{
return(queryFilter);
}
if (queryFilter == null)
{
return(new QueryFilter()
{
WhereClause = appendFilter
});
}
var result = queryFilter.Clone() as IQueryFilter;
if (result != null)
{
result.WhereClause = queryFilter.WhereClause.AppendWhereClause(appendFilter);
}
return(result);
}
async static public Task <IFeatureCursor> Create(OgcSpatialFeatureclass fc, IQueryFilter filter)
{
var featureCursor = new OgcSpatialFeatureCursor(fc, filter);
if (fc == null || fc.Dataset == null)
{
return(featureCursor);
}
featureCursor._idField = fc.IDFieldName;
if (filter is ISpatialFilter)
{
featureCursor._spatialfilter = (ISpatialFilter)filter;
}
try
{
if (fc.SpatialReference != null &&
filter is ISpatialFilter &&
((ISpatialFilter)filter).FilterSpatialReference != null &&
!((ISpatialFilter)filter).FilterSpatialReference.Equals(fc.SpatialReference))
{
filter = (ISpatialFilter)filter.Clone();
((ISpatialFilter)filter).Geometry =
GeometricTransformerFactory.Transform2D(((ISpatialFilter)filter).Geometry,
((ISpatialFilter)filter).FilterSpatialReference,
fc.SpatialReference);
((ISpatialFilter)filter).FilterSpatialReference = null;
if (((ISpatialFilter)filter).SpatialRelation == spatialRelation.SpatialRelationMapEnvelopeIntersects &&
((ISpatialFilter)filter).Geometry != null)
{
((ISpatialFilter)filter).Geometry = ((ISpatialFilter)filter).Geometry.Envelope;
}
featureCursor._spatialfilter = (ISpatialFilter)filter;
}
DbCommand command = ((OgcSpatialDataset)fc.Dataset).SelectCommand(
fc, filter, out featureCursor._shapeField);
if (command == null)
{
return(featureCursor);
}
featureCursor._subFields = filter.QuerySubFields.ToArray();
featureCursor._conn = ((OgcSpatialDataset)fc.Dataset).ProviderFactory.CreateConnection();
featureCursor._conn.ConnectionString = fc.Dataset.ConnectionString;
command.Connection = featureCursor._conn;
if (featureCursor._conn.State != ConnectionState.Closed)
{
try
{
featureCursor._conn.Close();
}
catch { }
}
await featureCursor._conn.OpenAsync();
command.SetCustomCursorTimeout();
featureCursor._reader = await command.ExecuteReaderAsync();
return(featureCursor);
}
catch (Exception ex)
{
if (featureCursor._fc != null)
{
featureCursor._fc.LastException = ex;
}
if (featureCursor._conn != null && featureCursor._conn.State != ConnectionState.Closed)
{
featureCursor._conn.Close();
featureCursor._conn = null;
}
fc.LastException = ex;
return(null);
}
}
public OgcSpatialFeatureCursor(OgcSpatialFeatureclass fc, IQueryFilter filter)
: base((fc != null) ? fc.SpatialReference : null,
(filter != null) ? filter.FeatureSpatialReference : null)
{
if (fc == null || fc.Dataset == null)
{
return;
}
_idField = fc.IDFieldName;
if (filter is ISpatialFilter)
{
_spatialfilter = (ISpatialFilter)filter;
}
try
{
if (fc.SpatialReference != null &&
filter is ISpatialFilter &&
((ISpatialFilter)filter).FilterSpatialReference != null &&
!((ISpatialFilter)filter).FilterSpatialReference.Equals(fc.SpatialReference))
{
filter = (ISpatialFilter)filter.Clone();
((ISpatialFilter)filter).Geometry =
GeometricTransformer.Transform2D(((ISpatialFilter)filter).Geometry,
((ISpatialFilter)filter).FilterSpatialReference,
fc.SpatialReference);
((ISpatialFilter)filter).FilterSpatialReference = null;
if (((ISpatialFilter)filter).SpatialRelation == spatialRelation.SpatialRelationMapEnvelopeIntersects &&
((ISpatialFilter)filter).Geometry != null)
{
((ISpatialFilter)filter).Geometry = ((ISpatialFilter)filter).Geometry.Envelope;
}
_spatialfilter = (ISpatialFilter)filter;
}
DbCommand command = ((OgcSpatialDataset)fc.Dataset).SelectCommand(
fc, filter, out _shapeField);
if (command == null)
{
return;
}
_conn = ((OgcSpatialDataset)fc.Dataset).ProviderFactory.CreateConnection();
_conn.ConnectionString = fc.Dataset.ConnectionString;
command.Connection = _conn;
if (_conn.State != ConnectionState.Closed)
{
try
{
_conn.Close();
}
catch { }
}
_conn.Open();
//command.Prepare();
_reader = command.ExecuteReader();
}
catch (Exception ex)
{
if (_fc != null)
{
_fc.LastException = ex;
}
if (_conn != null && _conn.State != ConnectionState.Closed)
{
_conn.Close();
_conn = null;
}
}
}