/// <inheritdoc />
public void Run(Node entrypoint)
{
var visited = new HashSet <Node>();
var queue = new Queue <(Node node, Edge origin, int depth)>();
queue.Enqueue((entrypoint, null, 0));
while (queue.Count > 0)
{
var(node, origin, depth) = queue.Dequeue();
var eventArgs = new NodeDiscoveryEventArgs(node, origin, depth)
{
ContinueExploring = visited.Add(node)
};
OnNodeDiscovered(eventArgs);
if (eventArgs.Abort)
{
return;
}
if (eventArgs.ContinueExploring)
{
foreach (var edge in node.OutgoingEdges)
{
queue.Enqueue((edge.GetOtherNode(node), edge, depth + 1));
}
}
}
OnTraversalCompleted();
}
/// <inheritdoc />
public void Run(Node entrypoint)
{
if (entrypoint == null)
{
throw new ArgumentNullException(nameof(entrypoint));
}
var visited = new HashSet <Node>();
var stack = new Stack <(Node node, Edge edge)>();
stack.Push((entrypoint, null));
while (stack.Count > 0)
{
var(node, origin) = stack.Pop();
var eventArgs = new NodeDiscoveryEventArgs(node, origin)
{
ContinueExploring = visited.Add(node)
};
OnNodeDiscovered(eventArgs);
if (eventArgs.Abort)
{
return;
}
if (eventArgs.ContinueExploring)
{
foreach (var edge in node.OutgoingEdges)
{
stack.Push((edge.GetOtherNode(node), edge));
}
}
}
}
private void TraversalOnNodeDiscovered(object sender, NodeDiscoveryEventArgs e)
{
if (!_indices.ContainsKey(e.NewNode))
{
_indices[e.NewNode] = _indices.Count;
_order.Add(e.NewNode);
}
}
private void TraversalOnNodeDiscovered(object sender, NodeDiscoveryEventArgs e)
{
if (!e.ContinueExploring)
{
return;
}
if (e.Origin == null)
{
AddRemainingNodes();
}
else
{
var originNode = e.Origin.GetOtherNode(e.NewNode);
while (_stack.Peek() != originNode)
{
_order.Add(_stack.Pop());
}
}
_stack.Push(e.NewNode);
}
protected virtual void OnNodeDiscovered(NodeDiscoveryEventArgs e)
{
NodeDiscovered?.Invoke(this, e);
}