/// <summary>
/// This method detects the geometry type from 'GetFeature' response and uses a geometry factory to create the
/// appropriate geometries.
/// </summary>
/// <returns></returns>
internal override Collection <Geometry> createGeometries()
{
GeometryFactory geomFactory = null;
string geometryTypeString = string.Empty;
string serviceException = null;
if (_QuickGeometries)
{
_MultiGeometries = false;
}
IPathNode pointNode = new PathNode(_GMLNS, "Point", (NameTable)_XmlReader.NameTable);
IPathNode lineStringNode = new PathNode(_GMLNS, "LineString", (NameTable)_XmlReader.NameTable);
IPathNode polygonNode = new PathNode(_GMLNS, "Polygon", (NameTable)_XmlReader.NameTable);
IPathNode multiPointNode = new PathNode(_GMLNS, "MultiPoint", (NameTable)_XmlReader.NameTable);
IPathNode multiLineStringNode = new PathNode(_GMLNS, "MultiLineString", (NameTable)_XmlReader.NameTable);
IPathNode multiCurveNode = new PathNode(_GMLNS, "MultiCurve", (NameTable)_XmlReader.NameTable);
IPathNode multiLineStringNodeAlt = new AlternativePathNodesCollection(multiLineStringNode, multiCurveNode);
IPathNode multiPolygonNode = new PathNode(_GMLNS, "MultiPolygon", (NameTable)_XmlReader.NameTable);
IPathNode multiSurfaceNode = new PathNode(_GMLNS, "MultiSurface", (NameTable)_XmlReader.NameTable);
IPathNode multiPolygonNodeAlt = new AlternativePathNodesCollection(multiPolygonNode, multiSurfaceNode);
while (_XmlReader.Read())
{
if (_XmlReader.NodeType == XmlNodeType.Element)
{
if (_MultiGeometries)
{
if (multiPointNode.Matches(_XmlReader))
{
geomFactory = new MultiPointFactory(_HttpClientUtil, _FeatureTypeInfo, _LabelInfo);
geometryTypeString = "MultiPointPropertyType";
break;
}
if (multiLineStringNodeAlt.Matches(_XmlReader))
{
geomFactory = new MultiLineStringFactory(_HttpClientUtil, _FeatureTypeInfo, _LabelInfo);
geometryTypeString = "MultiLineStringPropertyType";
break;
}
if (multiPolygonNodeAlt.Matches(_XmlReader))
{
geomFactory = new MultiPolygonFactory(_HttpClientUtil, _FeatureTypeInfo, _LabelInfo);
geometryTypeString = "MultiPolygonPropertyType";
break;
}
}
if (pointNode.Matches(_XmlReader))
{
geomFactory = new PointFactory(_HttpClientUtil, _FeatureTypeInfo, _LabelInfo);
geometryTypeString = "PointPropertyType";
break;
}
if (lineStringNode.Matches(_XmlReader))
{
geomFactory = new LineStringFactory(_HttpClientUtil, _FeatureTypeInfo, _LabelInfo);
geometryTypeString = "LineStringPropertyType";
break;
}
if (polygonNode.Matches(_XmlReader))
{
geomFactory = new PolygonFactory(_HttpClientUtil, _FeatureTypeInfo, _LabelInfo);
geometryTypeString = "PolygonPropertyType";
break;
}
if (_ServiceExceptionNode.Matches(_XmlReader))
{
serviceException = _XmlReader.ReadInnerXml();
Trace.TraceError("A service exception occured: " + serviceException);
throw new Exception("A service exception occured: " + serviceException);
}
}
}
_FeatureTypeInfo.Geometry._GeometryType = geometryTypeString;
if (geomFactory != null)
{
return(_QuickGeometries
? geomFactory.createQuickGeometries(geometryTypeString)
: geomFactory.createGeometries());
}
return(_Geoms);
}
/// <summary>
/// This method parses quickly without paying attention to
/// context validation, polygon boundaries and multi-geometries.
/// This accelerates the geometry parsing process,
/// but in scarce cases can lead to errors.
/// </summary>
/// <param name="geometryType">The geometry type (Point, LineString, Polygon, MultiPoint, MultiCurve,
/// MultiLineString (deprecated), MultiSurface, MultiPolygon (deprecated)</param>
/// <returns>The created geometries</returns>
internal virtual Collection <Geometry> createQuickGeometries(string geometryType)
{
// Ignore multi-geometries
if (geometryType.Equals("MultiPointPropertyType"))
{
geometryType = "PointPropertyType";
}
else if (geometryType.Equals("MultiLineStringPropertyType"))
{
geometryType = "LineStringPropertyType";
}
else if (geometryType.Equals("MultiPolygonPropertyType"))
{
geometryType = "PolygonPropertyType";
}
else if (geometryType.Equals("MultiCurvePropertyType"))
{
geometryType = "CurvePropertyType";
}
else if (geometryType.Equals("MultiSurfacePropertyType"))
{
geometryType = "SurfacePropertyType";
}
string serviceException = null;
while (_XmlReader.Read())
{
if (_CoordinatesNode.Matches(_XmlReader))
{
try
{
switch (geometryType)
{
case "PointPropertyType":
_Geoms.Add(ParseCoordinates(_XmlReader.ReadSubtree())[0]);
break;
case "LineStringPropertyType":
case "CurvePropertyType":
_Geoms.Add(new LineString(ParseCoordinates(_XmlReader.ReadSubtree())));
break;
case "PolygonPropertyType":
case "SurfacePropertyType":
Polygon polygon = new Polygon();
polygon.ExteriorRing = new LinearRing(ParseCoordinates(_XmlReader.ReadSubtree()));
_Geoms.Add(polygon);
break;
default:
break;
}
}
catch (Exception ex)
{
Trace.TraceError("An exception occured while parsing a " + geometryType + " geometry: " +
ex.Message);
throw ex;
}
continue;
}
if (_ServiceExceptionNode.Matches(_XmlReader))
{
serviceException = _XmlReader.ReadInnerXml();
Trace.TraceError("A service exception occured: " + serviceException);
throw new Exception("A service exception occured: " + serviceException);
}
}
return(_Geoms);
}