public GeoJsonFeatureCursor(GeoJsonServiceFeatureClass fc, IEnumerable <IFeature> features, IQueryFilter filter)
: base(fc?.SpatialReference, filter?.FeatureSpatialReference)
{
_features = features?.ToArray();
_queryFilter = filter;
_spatialFilter = filter as ISpatialFilter;
}
async public static Task <GeoJsonServiceFeatureClass> CreateInstance(GeoJsonServiceDataset dataset, geometryType geometryType)
{
var instance = new GeoJsonServiceFeatureClass(dataset);
instance.SpatialReference = await dataset.GetSpatialReference();
instance.GeometryType = geometryType;
instance.Name = $"{ dataset.DatasetName }-{ geometryType.ToString().ToLower() }";
#region Loop all features for Fields
var fields = new Fields();
if (dataset.Source != null)
{
bool idIsInterger = false;
var features = await dataset.Source.GetFeatures(geometryType);
// mayby later...
//if (features != null && features.Count() > 0)
//{
// idIsInterger = features.Where(f => f != null && int.TryParse(f["id"]?.ToString(), out int intId))
// .Count() == features.Count();
//}
foreach (var feature in features)
{
foreach (var fieldValue in feature.Fields)
{
if (fields.FindField(fieldValue.Name) == null)
{
var val = fieldValue.Value;
if (fieldValue.Name == "id" && idIsInterger)
{
fields.Add(new Field(fieldValue.Name, FieldType.ID));
}
else if (val?.GetType() == typeof(int))
{
fields.Add(new Field(fieldValue.Name, FieldType.integer));
}
else if (val?.GetType() == typeof(double))
{
fields.Add(new Field(fieldValue.Name, FieldType.Double));
}
else
{
// ToDo: Check for Date?
fields.Add(new Field(fieldValue.Name, FieldType.String));
}
}
}
}
}
instance.Fields = fields;
#endregion
return(instance);
}
async public Task <List <IDatasetElement> > Elements()
{
if (_source != null && _layers.Count == 0)
{
_layers.Add(new DatasetElement(await GeoJsonServiceFeatureClass.CreateInstance(this, geometryType.Point)));
_layers.Add(new DatasetElement(await GeoJsonServiceFeatureClass.CreateInstance(this, geometryType.Polyline)));
_layers.Add(new DatasetElement(await GeoJsonServiceFeatureClass.CreateInstance(this, geometryType.Polygon)));
}
return(_layers);
}