/// <summary>
/// Create a child node
/// </summary>
/// <param name="type">The node type</param>
/// <returns>The child node</returns>
internal SpatialBuilderNode CreateChildren(SpatialType type)
{
var node = new SpatialBuilderNode {
Parent = this, Type = type
};
this.Children.Add(node);
return(node);
}
internal override void BeginGeo(SpatialType type)
{
if (this.currentNode == null)
{
SpatialBuilderNode node = new SpatialBuilderNode {
Type = type
};
this.currentNode = node;
this.lastConstructedNode = null;
}
else
{
this.currentNode = this.currentNode.CreateChildren(type);
}
}
/// <summary>
/// Begin a new spatial type
/// </summary>
/// <param name="type">The spatial type</param>
internal override void BeginGeo(SpatialType type)
{
Debug.Assert(type != SpatialType.Unknown, "cannot build unknown type - should have validated this call");
// traverse down the tree);
if (this.currentNode == null)
{
this.currentNode = new SpatialBuilderNode {
Type = type
};
// we are just getting started, clear the last built
this.lastConstructedNode = null;
}
else
{
this.currentNode = this.currentNode.CreateChildren(type);
}
}
/// <summary>
/// Ends the figure set on the current node
/// </summary>
internal override void EndFigure()
{
Debug.Assert(this.currentFigure != null, "current figure is null - call AddPointToNode before ending a figure");
// Attach the figure to the current node
if (this.currentFigure.Count == 1)
{
// point
SpatialBuilderNode pointNode = this.currentNode.CreateChildren(SpatialType.Point);
pointNode.Instance = this.currentFigure[0];
}
else
{
SpatialBuilderNode lineStringNode = this.currentNode.CreateChildren(SpatialType.LineString);
lineStringNode.Instance = this.CreateShapeInstance(SpatialType.LineString, this.currentFigure);
}
// need to clear current figure, since next geography may not contain a figure
this.currentFigure = null;
}
/// <summary>
/// Traverses up the tree.
/// </summary>
private void TraverseUpTheTree()
{
this.lastConstructedNode = this.currentNode;
this.currentNode = this.currentNode.Parent;
}
/// <summary>
/// Setup the pipeline for reuse
/// </summary>
internal override void Reset()
{
this.currentNode = null;
this.currentFigure = null;
}
