private static IEnumerable <IGeometry> GetReferenceGeometries(
[NotNull] IObject obj,
[NotNull] IList <IRelationshipClass> relationshipChainToFeatureClass)
{
if (relationshipChainToFeatureClass.Count == 0)
{
yield break;
}
if (relationshipChainToFeatureClass.Count == 1)
{
foreach (IObject relatedObject in
GdbQueryUtils.GetRelatedObjects(obj, relationshipChainToFeatureClass))
{
var relatedFeature = relatedObject as IFeature;
if (relatedFeature != null)
{
yield return(relatedFeature.Shape);
}
else
{
_msg.DebugFormat("Related object in spatial relation is not a feature: {0}",
GdbObjectUtils.ToString(relatedObject));
}
}
}
else
{
int?shapeFieldIndex = null;
foreach (IRow joinedRow in GetJoinedRows(obj, relationshipChainToFeatureClass))
{
// determine shape field index based on the first row
if (shapeFieldIndex == null)
{
int index;
if (TryGetShapeFieldIndex(joinedRow.Fields, out index))
{
shapeFieldIndex = index;
}
else
{
_msg.WarnFormat(
"Shape field not found in joined table for getting reference geometry for {0}",
DatasetUtils.GetName(obj.Class));
yield break;
}
}
yield return(joinedRow.Value[shapeFieldIndex.Value] as IGeometry);
}
}
}
