private static void TraverseDiagram(WorkflowGraphNode currentNode, ISet <WorkflowGraphNode> visitedNodes)
{
if (visitedNodes.Contains(currentNode))
{
return;
}
visitedNodes.Add(currentNode);
foreach (var nextNode in currentNode.NextNodes.Where(node => !visitedNodes.Contains(node)))
{
TraverseDiagram(nextNode, visitedNodes);
}
}
public WorkflowGraph(IeWorkflow workflow)
{
if (workflow == null)
{
throw new ArgumentNullException(nameof(workflow));
}
if (workflow.States == null)
{
throw new ArgumentNullException(nameof(workflow.States));
}
if (workflow.TransitionEvents == null)
{
throw new ArgumentNullException(nameof(workflow.TransitionEvents));
}
_nodesByName = new Dictionary <string, WorkflowGraphNode>();
foreach (var state in workflow.States)
{
if (string.IsNullOrWhiteSpace(state.Name))
{
throw new ArgumentException(StateHasNoNameError);
}
var node = new WorkflowGraphNode(state);
_nodesByName[state.Name] = node;
if (node.IsInitial)
{
_initialNode = node;
}
}
if (_initialNode == null)
{
throw new ArgumentException(NoInitialStateError);
}
foreach (var transition in workflow.TransitionEvents)
{
if (string.IsNullOrWhiteSpace(transition.FromState))
{
throw new ArgumentException(TransitionHasNoFromStateError);
}
if (string.IsNullOrWhiteSpace(transition.ToState))
{
throw new ArgumentException(TransitionHasNoToStateError);
}
WorkflowGraphNode fromNode;
WorkflowGraphNode toNode;
if (_nodesByName.TryGetValue(transition.FromState, out fromNode) &&
_nodesByName.TryGetValue(transition.ToState, out toNode))
{
fromNode.AddNextNode(toNode);
}
}
}
public void AddNextNode(WorkflowGraphNode node)
{
_nextNodes.Add(node);
}