// This method firstly groups geometries by dimension (points, lines,
// areas),
// then simplifies each group such that each group is reduced to a single
// geometry.
// As a result there are at most three geometries, each geometry is Simple.
// Afterwards
// it produces a single OGCGeometry.
private com.epl.geometry.ogc.OGCGeometry SimplifyBunch_(com.epl.geometry.GeometryCursor gc)
{
// Combines geometries into multipoint, polyline, and polygon types,
// simplifying them and unioning them,
// then produces OGCGeometry from the result.
// Can produce OGCConcreteGoemetryCollection
com.epl.geometry.MultiPoint dstMultiPoint = null;
System.Collections.Generic.List <com.epl.geometry.Geometry> dstPolylines = new System.Collections.Generic.List <com.epl.geometry.Geometry>();
System.Collections.Generic.List <com.epl.geometry.Geometry> dstPolygons = new System.Collections.Generic.List <com.epl.geometry.Geometry>();
for (com.epl.geometry.Geometry g = gc.Next(); g != null; g = gc.Next())
{
switch (g.GetType())
{
case com.epl.geometry.Geometry.Type.Point:
{
if (dstMultiPoint == null)
{
dstMultiPoint = new com.epl.geometry.MultiPoint();
}
dstMultiPoint.Add((com.epl.geometry.Point)g);
break;
}
case com.epl.geometry.Geometry.Type.MultiPoint:
{
if (dstMultiPoint == null)
{
dstMultiPoint = new com.epl.geometry.MultiPoint();
}
dstMultiPoint.Add((com.epl.geometry.MultiPoint)g, 0, -1);
break;
}
case com.epl.geometry.Geometry.Type.Polyline:
{
dstPolylines.Add((com.epl.geometry.Polyline)g.Copy());
break;
}
case com.epl.geometry.Geometry.Type.Polygon:
{
dstPolygons.Add((com.epl.geometry.Polygon)g.Copy());
break;
}
default:
{
throw new System.NotSupportedException();
}
}
}
System.Collections.Generic.List <com.epl.geometry.Geometry> result = new System.Collections.Generic.List <com.epl.geometry.Geometry>(3);
if (dstMultiPoint != null)
{
com.epl.geometry.Geometry resMP = com.epl.geometry.OperatorSimplifyOGC.Local().Execute(dstMultiPoint, esriSR, true, null);
result.Add(resMP);
}
if (dstPolylines.Count > 0)
{
if (dstPolylines.Count == 1)
{
com.epl.geometry.Geometry resMP = com.epl.geometry.OperatorSimplifyOGC.Local().Execute(dstPolylines[0], esriSR, true, null);
result.Add(resMP);
}
else
{
com.epl.geometry.GeometryCursor res = com.epl.geometry.OperatorUnion.Local().Execute(new com.epl.geometry.SimpleGeometryCursor(dstPolylines), esriSR, null);
com.epl.geometry.Geometry resPolyline = res.Next();
com.epl.geometry.Geometry resMP = com.epl.geometry.OperatorSimplifyOGC.Local().Execute(resPolyline, esriSR, true, null);
result.Add(resMP);
}
}
if (dstPolygons.Count > 0)
{
if (dstPolygons.Count == 1)
{
com.epl.geometry.Geometry resMP = com.epl.geometry.OperatorSimplifyOGC.Local().Execute(dstPolygons[0], esriSR, true, null);
result.Add(resMP);
}
else
{
com.epl.geometry.GeometryCursor res = com.epl.geometry.OperatorUnion.Local().Execute(new com.epl.geometry.SimpleGeometryCursor(dstPolygons), esriSR, null);
com.epl.geometry.Geometry resPolygon = res.Next();
com.epl.geometry.Geometry resMP = com.epl.geometry.OperatorSimplifyOGC.Local().Execute(resPolygon, esriSR, true, null);
result.Add(resMP);
}
}
return(com.epl.geometry.ogc.OGCGeometry.CreateFromEsriCursor(new com.epl.geometry.SimpleGeometryCursor(result), esriSR));
}
