protected override int CompleteTileCore(TileInfo args)
{
if (args.State == TileState.Initial)
{
_tileFeatures.Clear();
_tileAreasOfInterest.Clear();
_allBox = null;
_knownGaps = null;
return(NoError);
}
try
{
if (_allBox == null)
{
Assert.NotNull(args.AllBox, "args.AllBox");
_allBox = QaGeometryUtils.CreateBox(Assert.NotNull(args.AllBox, "AllBox"));
}
if (_knownGaps == null)
{
_knownGaps = new KnownGaps(_maxArea, _tolerance, _allBox);
}
Assert.NotNull(args.CurrentEnvelope, "args.CurrentEnvelope");
IEnvelope tileEnvelope =
GeometryFactory.Clone(Assert.NotNull(args.CurrentEnvelope, "CurrentEnvelope"));
tileEnvelope.SpatialReference = _spatialReference;
var errorCount = 0;
foreach (IEnvelope subtile in GetSubtiles(tileEnvelope))
{
errorCount += CheckSubtile(subtile, _allBox, _tileFeatures, _knownGaps);
// this can be the entire (cloned) tileEnvelope:
Marshal.ReleaseComObject(subtile);
GC.Collect();
GC.WaitForPendingFinalizers();
}
if (args.State == TileState.Final)
{
_knownGaps = null;
}
return(errorCount);
}
finally
{
_tileFeatures.Clear();
}
}
private int CheckSubtile([NotNull] IEnvelope tileEnvelope,
[NotNull] Box allBox,
[NotNull] IEnumerable <IFeature> features,
[NotNull] KnownGaps knownGaps)
{
Assert.ArgumentNotNull(tileEnvelope, nameof(tileEnvelope));
Assert.ArgumentNotNull(allBox, nameof(allBox));
Assert.ArgumentNotNull(features, nameof(features));
Assert.ArgumentNotNull(knownGaps, nameof(knownGaps));
WKSEnvelope tileBox;
WKSEnvelope clipBox;
IEnvelope clipEnvelope =
GetClipEnvelope(tileEnvelope, allBox, _tolerance,
out tileBox, out clipBox);
IList <IGeometry> geometriesToRelease;
IList <IGeometry> clippedPolygons;
if (_findGapsBelowTolerance)
{
clippedPolygons = GetClippedPolygonCopies(
clipEnvelope, _spatialReference, features);
geometriesToRelease = clippedPolygons;
}
else
{
clippedPolygons = GetClippedPolygons(
clipEnvelope, features, out geometriesToRelease);
}
IPolygon clipPolygon = GeometryFactory.CreatePolygon(clipEnvelope);
IList <IPolygon> gapPolygons = GetGapPolygons(clippedPolygons,
clipPolygon,
clipEnvelope,
tileEnvelope).ToList();
var errorCount = 0;
foreach (IPolygon completedGap in
knownGaps.GetCompletedGaps(gapPolygons, clipEnvelope, tileEnvelope))
{
errorCount += CheckGapPolygon(completedGap);
}
ReleaseGeometries(geometriesToRelease);
return(errorCount);
}