private void buildTree(Node node)
{
if (objects.Contains(node))
{
if (!strict) return;
throw new NotATreeException();
}
objects.Add(node);
// get the appropriate arrows
ArrowCollection arrows = new ArrowCollection();
if (reversedDir)
node.getAllIncomingArrows(arrows);
else
node.getAllOutgoingArrows(arrows);
// build subtrees recursively
foreach (Arrow a in arrows)
{
if (enumArrows) objects.Add(a);
buildTree(reversedDir ? a.Origin : a.Destination);
}
}
