private int CheckLoop([NotNull] IGeometry geometry,
int startVertexIndex,
int endVertexIndex,
[NotNull] IRow row)
{
Assert.ArgumentNotNull(geometry, nameof(geometry));
Assert.ArgumentNotNull(row, nameof(row));
const string baseMessage = "Boundary loop";
const string baseMessageStartPoint = "Boundary loop (start point)";
string noPolygonReason = string.Empty;
IPolygon loopPolygon = null;
if (_errorGeometry == BoundaryLoopErrorGeometry.LoopPolygon || _areaLimit > 0)
{
// the loop polygon will be needed, try to create it
loopPolygon = BoundaryLoopUtils.TryCreateLoopPolygon(geometry, startVertexIndex,
endVertexIndex,
out noPolygonReason);
}
if (_areaLimit > 0)
{
return(CheckLoopArea(geometry, startVertexIndex, loopPolygon,
noPolygonReason, row,
baseMessage, baseMessageStartPoint));
}
// no area check applied:
if (_errorGeometry == BoundaryLoopErrorGeometry.LoopStartPoint)
{
return(ReportError(baseMessage,
GetPoint(geometry, startVertexIndex),
Codes[Code.BoundaryLoop], _shapeFieldName,
row));
}
// polygon is requested as error geometry
if (loopPolygon == null)
{
// ... but the polygon could not be created
string description = string.Format("{0} - unable to determine loop polygon: {1}",
baseMessageStartPoint, noPolygonReason);
return(ReportError(description,
GetPoint(geometry, startVertexIndex),
Codes[Code.BoundaryLoop_UnableToConstructLoopPolygon],
_shapeFieldName,
row));
}
return(ReportError(baseMessage, loopPolygon,
Codes[Code.BoundaryLoop], _shapeFieldName,
row));
}
private static IPolyline GetOutermostBoundary(IPolygon fullUnionPolygon,
out List <IRing> innerRings)
{
var resultRings = new List <IPath>();
innerRings = new List <IRing>();
foreach (IRing ring in GeometryUtils.GetRings(fullUnionPolygon))
{
if (ring.IsExterior)
{
resultRings.Add(ring);
}
else
{
innerRings.Add(ring);
}
}
IPolyline fullUnionOuterRings = GeometryFactory.CreatePolyline(resultRings);
// TOP-4915: Must also handle boundary loops between source and target
foreach (IPolygon boundaryLoop in BoundaryLoopUtils.GetBoundaryLoops(
fullUnionPolygon, GeometryUtils.GetXyTolerance(fullUnionPolygon)))
{
// remove from result, add to rings
IPolyline boundaryLoopLine = GeometryFactory.CreatePolyline(boundaryLoop);
fullUnionOuterRings =
(IPolyline)IntersectionUtils.Difference(
fullUnionOuterRings, boundaryLoopLine);
innerRings.AddRange(GeometryUtils.GetRings(boundaryLoop));
}
return(fullUnionOuterRings);
}
