public static ProcedureFunctionChart CreateLoopTestPfc()
{
ProcedureFunctionChart pfc = new ProcedureFunctionChart(new Highpoint.Sage.SimCore.Model("Test model", Guid.NewGuid()), "SFC 1");
#region Create Nodes
A = pfc.CreateStep("Step_A", "", Guid.NewGuid());
B = pfc.CreateStep("Step_B", "", Guid.NewGuid());
C = pfc.CreateStep("Step_C", "", Guid.NewGuid());
nA = (IPfcNode)A;
nB = (IPfcNode)B;
nC = (IPfcNode)C;
#endregion Create Nodes
#region Create Structure
pfc.Bind(nA, nB);
pfc.Bind(nB, nC);
pfc.Bind(nB, nB);
#endregion Create Structure
return(pfc);
}
private int OnProcessingSequence(IPfcNode node1, IPfcNode node2)
{
// Must process parallel convergences last.
InputRole ir1 = GetValidationData(node1).InputRole;
InputRole ir2 = GetValidationData(node2).InputRole;
if (ir1 == InputRole.ParallelConvergence && ir2 != InputRole.ParallelConvergence)
{
return(1);
}
if (ir1 != InputRole.ParallelConvergence && ir2 == InputRole.ParallelConvergence)
{
return(-1);
}
if (Node1DependsOnNode2(node1, node2))
{
return(1);
}
else if (Node1DependsOnNode2(node2, node1))
{
return(-1);
}
else
{
return(-Comparer.Default.Compare(node2.GraphOrdinal, node1.GraphOrdinal));
}
}
/// <summary>
/// Determines whether the specified element is the last element on a path. That is, if deletion of this
/// element (and its preceding and following links) would not leave dead-end nodes in the graph, it is considered
/// to be the last element in the path.
/// </summary>
/// <param name="element">The specified element.</param>
/// <returns>
/// <c>true</c> if the specified element is the last element on a path; otherwise, <c>false</c>.
/// </returns>
public static bool IsLastElementOnPath(IPfcElement element)
{
if (element.ElementType.Equals(PfcElementType.Link))
{
IPfcNode pre = ((IPfcLinkElement)element).Predecessor;
if (pre.SuccessorNodes.Count == 1)
{
return(false);
}
IPfcNode post = ((IPfcLinkElement)element).Successor;
if (post.PredecessorNodes.Count == 1)
{
return(false);
}
}
else
{
foreach (IPfcNode pre in ((IPfcNode)element).PredecessorNodes)
{
if (pre.SuccessorNodes.Count == 1)
{
return(false);
}
}
foreach (IPfcNode post in ((IPfcNode)element).SuccessorNodes)
{
if (post.PredecessorNodes.Count == 1)
{
return(false);
}
}
}
return(true);
}
public PfcValidationError(string name, string narrative, IPfcNode subject)
{
m_target = null;
m_name = name;
m_narrative = narrative;
m_subject = subject;
}
/// <summary>
/// Gets the primary path forward from the provided starting point node. The primary path is
/// the path that is comprised of all of the highest-priority links out of each node encountered.
/// </summary>
/// <param name="startPoint">The starting point.</param>
/// <param name="stepsOnly">if set to <c>true</c> it returns steps only. Otherwise, it returns all nodes.</param>
/// <returns>The primary path.</returns>
public static List <IPfcNode> GetPrimaryPath(IPfcNode startPoint, bool stepsOnly)
{
List <IPfcNode> retval = new List <IPfcNode>();
IPfcNode cursor = startPoint;
while (true)
{
if (retval.Contains(cursor))
{
int firstElementInLoop = retval.IndexOf(cursor);
ArrayList loopers = new ArrayList();
for (int i = firstElementInLoop; i < retval.Count; i++)
{
loopers.Add(retval[i]);
}
string looperString = StringOperations.ToCommasAndAndedList(loopers);
throw new ApplicationException("Primary path contains a loop, which consists of " + looperString + "!");
}
if (!stepsOnly || (cursor.ElementType.Equals(PfcElementType.Step)))
{
retval.Add(cursor);
}
if (cursor.Successors.Count == 0)
{
break;
}
cursor = cursor.SuccessorNodes[0];
}
return(retval);
}
private bool ProcessParallelConvergence(IPfcNode node)
{
// Only run it if it's the last encounter of a parallel convergence.
if (GetValidationData(node).DequeueCount == node.PredecessorNodes.Count())
{
if (m_diagnostics)
{
Console.WriteLine("\tProcessing closure of {0}.", node.Name);
}
// To test parallel convergence into a target node, find the divergence node, and then
// from that point, all parallel, and at least one of every set of serially divergent
// paths, must contain the target node. If not all of the serially-divergent paths does,
// then we will catch that in the serial convergence handler.
UpdateClosureToken(node as IPfcTransitionNode);
return(true);
}
else
{
if (m_diagnostics)
{
Console.WriteLine("\tNot processing {0} further - we'll encounter it again.", node.Name);
}
return(false);
}
}
private void BuildDependencies(IPfcNode node, Stack <IPfcLinkElement> stack)
{
foreach (IPfcLinkElement outbound in node.Successors)
{
if (!stack.Contains(outbound))
{
LinkValidationData lvd = GetValidationData(outbound);
if (lvd.NodesBelow == null)
{
stack.Push(outbound);
BuildDependencies(outbound.Successor, stack);
stack.Pop();
lvd.NodesBelow = new bool[m_maxGraphOrdinal + 1];
lvd.NodesBelow[outbound.Successor.GraphOrdinal] = true;
foreach (IPfcLinkElement succOutboundLink in outbound.Successor.Successors)
{
LinkValidationData lvSuccLink = GetValidationData(succOutboundLink);
if (lvSuccLink.NodesBelow != null)
{
for (int i = 0; i < m_maxGraphOrdinal + 1; i++)
{
lvd.NodesBelow[i] |= lvSuccLink.NodesBelow[i];
}
}
}
}
}
}
}
/// <summary>
/// Detaches this link from its predecessor and successor.
/// </summary>
public void Detach()
{
Predecessor.Successors.Remove(this);
m_predecessor = null;
Successor.Predecessors.Remove(this);
m_successor = null;
}
public ValidationToken(IPfcNode origin)
{
m_origin = origin;
Name = string.Format("Token_{0}", _nToken++);
IsSelfReferential = true; // Defines a behavior in the underlying TreeNode.
m_openAlternatives = 1;
}
public void Test_InsertStepAndTransition()
{
Model model = new Model("SFC Test 1");
ProcedureFunctionChart pfc = new ProcedureFunctionChart(model, "SFC 1", "", Guid.NewGuid());
IPfcStepNode t0 = pfc.CreateStep("START", "", Guid.Empty);
IPfcStepNode t1 = pfc.CreateStep("FINISH", "", Guid.Empty);
pfc.Bind(t0, t1);
string structureString = PfcDiagnostics.GetStructure(pfc);
Console.WriteLine("Structure is \r\n" + structureString);
// Get reference to old successor
IPfcNode pfcNode = pfc.Nodes["T_000"];
IPfcNode oldSuccessorNode = pfcNode.SuccessorNodes[0];
// Add the step
IPfcStepNode newStep = pfc.CreateStep("STEP_1", "", Guid.Empty);
IPfcTransitionNode newTrans = pfc.CreateTransition();
// We are adding a step following a transition - binding is from selectedTrans-newStep-newTrans-oldSuccessorStep
pfc.Bind(pfcNode, newStep);
pfc.Bind(newStep, newTrans);
pfc.Bind(newTrans, oldSuccessorNode);
// Disconnect old successor
pfc.Unbind(pfcNode, oldSuccessorNode);
structureString = PfcDiagnostics.GetStructure(pfc);
Console.WriteLine("Structure is \r\n" + structureString);
Assert.IsTrue(structureString.Equals("{START-->[L_000(SFC 1.Root)]-->T_000}\r\n{T_000-->[L_002(SFC 1.Root)]-->STEP_1}\r\n{STEP_1-->[L_003(SFC 1.Root)]-->T_001}\r\n{T_001-->[L_004(SFC 1.Root)]-->FINISH}\r\n"));
}
/// <summary>
/// Determines whether all backward paths from 'from' contain the node 'target.' If they do,
/// and it is the first such encounter for a specific 'from' then it may be said that target
/// is the divergence node for 'from.'
/// </summary>
/// <param name="from">From.</param>
/// <param name="target">The target.</param>
/// <returns></returns>
private bool AllBackwardPathsContain(IPfcNode from, IPfcNode target)
{
NodeValidationData nvd = GetValidationData(from);
if (nvd.IsInPath == null)
{
if (!from.PredecessorNodes.Any())
{
nvd.IsInPath = false;
}
else if (from == target)
{
nvd.IsInPath = true;
}
else
{
nvd.IsInPath = true;
foreach (IPfcNode predecessorNode in from.PredecessorNodes)
{
if (!AllBackwardPathsContain(predecessorNode, target))
{
nvd.IsInPath = false;
break;
}
}
}
}
return(nvd.IsInPath.Value);
}
private bool AllForwardPathsContain(IPfcNode from, IPfcNode target, Stack <IPfcNode> path)
{
NodeValidationData nvd = GetValidationData(from);
if (nvd.IsInPath == null)
{
if (from.SuccessorNodes.Count() == 0)
{
nvd.IsInPath = false;
}
else if (from == target)
{
nvd.IsInPath = true;
}
else
{
nvd.IsInPath = true;
foreach (IPfcNode succ in from.SuccessorNodes)
{
if (!AllForwardPathsContain(succ, target, path))
{
nvd.IsInPath = false;
break;
}
}
}
}
return(nvd.IsInPath.Value);
}
/// <summary>
/// Gets the primary path forward from the provided starting point node. The primary path is
/// the path that is comprised on all of the highest-priority links out of each node encountered.
/// This path consists of
/// </summary>
/// <param name="startPoint">The starting point.</param>
/// <param name="stepsOnly">if set to <c>true</c> it returns steps only. Otherwise, it returns all nodes.</param>
/// <returns>The primary path as a string.</returns>
public static string GetPrimaryPathAsString(IPfcNode startPoint, bool stepsOnly)
{
List <IPfcNode> primaryPathList = GetPrimaryPath(startPoint, stepsOnly);
string primaryPath = StringOperations.ToCommasAndAndedListOfNames <IPfcNode>(primaryPathList);
return(primaryPath);
}
private void Reduce()
{
int count = 0;
bool success = false;
do
{
success = false;
foreach (IPfcNode node in m_pfc.Nodes)
{
if (
node.PredecessorNodes.Count == 1 &&
node.SuccessorNodes.Count == 1 &&
node.SuccessorNodes[0].PredecessorNodes.Count == 1 &&
node.SuccessorNodes[0].SuccessorNodes.Count == 1 && (
node.PredecessorNodes[0].SuccessorNodes.Count == 1 ||
node.SuccessorNodes[0].SuccessorNodes[0].PredecessorNodes.Count == 1)
)
{
IPfcNode target1 = node;
IPfcNode target2 = node.SuccessorNodes[0];
IPfcNode from = node.PredecessorNodes[0];
IPfcNode to = node.SuccessorNodes[0].SuccessorNodes[0];
m_pfc.Bind(from, to);
target1.Predecessors[0].Detach();
target1.Successors[0].Detach();
target2.Successors[0].Detach();
success = true;
count += 2;
}
}
} while (success);
}
//private bool AllBackwardPathsContain(IPfcNode from, IPfcNode target, Stack<IPfcNode> path) {
// if (from.PredecessorNodes.Count() == 0) {
// return false;
// } else if (from == target) {
// return true;
// } else {
// foreach (IPfcNode pred in from.PredecessorNodes) {
// if (!path.Contains(pred)) {
// path.Push(pred);
// if (!AllBackwardPathsContain(pred, target, path))
// return false;
// path.Pop();
// }
// }
// return true;
// }
//}
private IPfcNode DivergenceNodeFor(IPfcNode closure)
{
NodeValidationData nvd = GetValidationData(closure);
//if (nvd.DivergenceNode != null)
// return nvd.DivergenceNode;
List <IPfcNode> possibles = new List <IPfcNode>();
foreach (IPfcTransitionNode trans in m_pfc.Transitions)
{
if (Node1DependsOnNode2(closure, trans))
{
possibles.Add(trans);
}
}
possibles.Sort(new PfcNode.NodeComparer());
possibles.Reverse();
foreach (IPfcNode possible in possibles)
{
m_pfc.Nodes.ForEach(n => GetValidationData(n).IsInPath = null);
if (AllBackwardPathsContain(closure, possible))
{
return(possible);
}
}
return(null);
}
private void OnActivationHappened(IPfcNode whoActivated)
{
Assert.IsTrue(m_nextExpected.Count > 0, "Unexpected activation occurred on " + whoActivated.Name + ".");
IPfcNode t = (IPfcNode)m_nextExpected.Dequeue();
Assert.AreEqual(t, whoActivated, "" + whoActivated.Name + " activated, but we were expecting " + t.Name + " to do so. This is an error.");
Console.WriteLine("Activation happened with " + t.Name + ".");
}
private bool AllForwardPathsContain(IPfcNode from, IPfcNode target)
{
m_pfc.Nodes.ForEach(n => GetValidationData(n).IsInPath = null);
Stack <IPfcNode> path = new Stack <IPfcNode>();
path.Push(from);
return(AllForwardPathsContain(from, target, path));
}
/// <summary>
/// Gets the divergence node (step or transtion) for the specified convergence node. This assumes
/// that outbound paths all diverged at the same node, and will converge at the same node as well.
/// </summary>
/// <param name="convergenceNode">The convergence node.</param>
/// <returns>
/// The join node, if the provided node is a convergence node, otherwise null.
/// </returns>
public static IPfcNode GetDivergenceNodeFor(IPfcNode convergenceNode)
{
if (convergenceNode.PredecessorNodes.Count < 2)
{
return(null);
}
return((IPfcNode)GetDivergenceElementForParallelPath(convergenceNode.PredecessorNodes[0]));
}
/// <summary>
/// Gets the convergence node (step or transtion) for the specified divergence node. This assumes
/// that outbound paths all diverged at the same node, and will converge at the same node as well.
/// </summary>
/// <param name="divergenceNode">The divergence node.</param>
/// <returns>The convergence node, if this node is a divergence node, otherwise null.</returns>
public static IPfcNode GetConvergenceNodeFor(IPfcNode divergenceNode)
{
if (divergenceNode.SuccessorNodes.Count < 2)
{
return(null);
}
return((IPfcNode)GetJoinNodeForParallelPath(divergenceNode.SuccessorNodes[0]));
}
public static void Detach(IPfcNode node)
{
NodeValidationData vd = node.UserData as NodeValidationData;
if (vd != null)
{
node.UserData = vd.m_userData;
}
}
public static Dictionary <IPfcNode, int> GetNodeDepths(ProcedureFunctionChart pfc)
{
Dictionary <IPfcNode, int> depths = new Dictionary <IPfcNode, int>();
//List<IPfcStepNode> nodes =
//Debug.Assert( nodes.Count == 1, "A PFC was passed into PFCAnalyst.GetNodeDepths(...) that had " + nodes.Count + " finish steps. This is illegal." );
IPfcNode node = pfc.GetFinishTransition( );
GetDepth(node, ref depths);
return(depths);
}
/// <summary>
/// Gets the link that connects this node to a successor node. Returns null if there is no such link.
/// </summary>
/// <param name="successorNode">The successor.</param>
/// <returns></returns>
public IPfcLinkElement GetLinkForSuccessorNode(IPfcNode successorNode)
{
IPfcLinkElement retval = null;
m_successors.ForEach(delegate(IPfcLinkElement le) { if (le.Successor == successorNode)
{
retval = le;
}
});
return(retval);
}
/// <summary>
/// Gets the link that connects this node to a predecessor node. Returns null if there is no such link.
/// </summary>
/// <param name="predecessorNode">The predecessor.</param>
/// <returns></returns>
public IPfcLinkElement GetLinkForPredecessorNode(IPfcNode predecessorNode)
{
IPfcLinkElement retval = null;
m_predecessors.ForEach(delegate(IPfcLinkElement le) { if (le.Predecessor == predecessorNode)
{
retval = le;
}
});
return(retval);
}
private void ProcessSerialDivergence(IPfcNode node)
{
ValidationToken nodeVt = GetValidationData(node).ValidationToken;
foreach (IPfcNode successor in node.SuccessorNodes)
{
nodeVt.IncrementAlternatePathsOpen();
Enqueue(node, successor, nodeVt);
}
nodeVt.DecrementAlternatePathsOpen();
//added 1 per child, subtract 1 overall. Thus 1 split to 4 yields 4 alt.
}
/// <summary>
/// Dequeues and sets up for evaluation, the active path.
/// </summary>
/// <returns>IPfcNode.</returns>
private IPfcNode Dequeue()
{
List <QueueData> tmp = new List <QueueData>(m_activePath);
tmp.Sort(OnProcessingSequence);
m_activePath.Clear();
tmp.ForEach(n => m_activePath.Enqueue(n));
QueueData qd = m_activePath.Dequeue();
IPfcNode retval = qd.To;
return(retval);
}
public static ProcedureFunctionChart CreateTestPfc5()
{
// Flip-flop pattern.
ProcedureFunctionChart pfc = new ProcedureFunctionChart(new Highpoint.Sage.SimCore.Model("Test model", Guid.NewGuid()), "SFC 1");
#region Create Nodes
char name = 'A';
A = pfc.CreateStep("Step_" + (name++), "", NextGuid());
B = pfc.CreateStep("Step_" + (name++), "", NextGuid());
C = pfc.CreateStep("Step_" + (name++), "", NextGuid());
D = pfc.CreateStep("Step_" + (name++), "", NextGuid());
E = pfc.CreateStep("Step_" + (name++), "", NextGuid());
F = pfc.CreateStep("Step_" + (name++), "", NextGuid());
nA = (IPfcNode)A;
nB = (IPfcNode)B;
nC = (IPfcNode)C;
nD = (IPfcNode)D;
nE = (IPfcNode)E;
nF = (IPfcNode)F;
#endregion Create Nodes
#region Create Structure
pfc.BindParallelDivergent(nA, new IPfcNode[] { nB, nC });
pfc.BindSeriesDivergent(nB, new IPfcNode[] { nD, nE });
pfc.BindSeriesDivergent(nC, new IPfcNode[] { nD, nE });
pfc.BindParallelConvergent(new IPfcNode[] { nD, nE }, nF);
PfcLinkElementList links = new PfcLinkElementList(pfc.Links);
links.Sort(new Comparison <IPfcLinkElement>(delegate(IPfcLinkElement a, IPfcLinkElement b) {
return(Comparer.Default.Compare(a.Name, b.Name));
}));
System.Reflection.BindingFlags bf = System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.FlattenHierarchy | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance;
foreach (IPfcLinkElement link in links)
{
typeof(PfcElement).GetFields(bf);
typeof(PfcElement).GetField("m_guid", bf).SetValue((PfcElement)link, NextGuid()); // Totally cheating.
}
//pfc.Bind(nD, pfc.Nodes["T_005"]);
#endregion Create Structure
return(pfc);
}
public static bool IsTargetNodeLegal(IPfcNode origin, IPfcNode target)
{
bool retval = false;
IProcedureFunctionChart parent = origin.Parent;
// We only evaluate step-to-step links, or transition-to-transition links,
// meaning that we must always add a shim node between them.
if (origin.ElementType.Equals(target.ElementType))
{
if (s_diagnostics)
{
Console.WriteLine("Before: " + StringOperations.ToCommasAndAndedListOfNames <IPfcNode>(parent.Nodes));
}
IPfcLinkElement link1, link2;
IPfcNode shimNode;
parent.Bind(origin, target, out link1, out shimNode, out link2, false);
if (s_diagnostics)
{
Console.WriteLine("During: " + StringOperations.ToCommasAndAndedListOfNames <IPfcNode>(parent.Nodes));
}
PfcValidator validator = new PfcValidator(parent);
retval = validator.PfcIsValid();
if (shimNode != null)
{
parent.Unbind(origin, shimNode, true);
parent.Unbind(shimNode, target, true);
parent.UpdateStructure();
}
else
{
parent.Unbind(origin, target);
}
if (s_diagnostics)
{
Console.WriteLine("After: " + StringOperations.ToCommasAndAndedListOfNames <IPfcNode>(parent.Nodes));
}
parent.ElementFactory.Retract();
}
else
{
return(false);
}
return(retval);
}
private void Enqueue(IPfcNode from, IPfcNode node, ValidationToken vt)
{
NodeValidationData vd = GetValidationData(node);
if (vd.InputRole == InputRole.ParallelConvergence)
{
GetValidationData(from).ValidationToken.DecrementAlternatePathsOpen();
}
vd.ValidationToken = vt;
m_activePath.Enqueue(new QueueData(from, node));
if (m_diagnostics)
{
Console.WriteLine("\tEnqueueing {0} with {1} ({2}).", node.Name, vt, vt.AlternatePathsOpen);
}
}
public static ProcedureFunctionChart CreateTestPfc4()
{
ProcedureFunctionChart pfc = new ProcedureFunctionChart(new Highpoint.Sage.SimCore.Model("Test model", Guid.NewGuid()), "SFC 1");
#region Create Nodes
char name = 'A';
A = pfc.CreateStep("Step_" + (name++), "", NextGuid());
B = pfc.CreateStep("Step_" + (name++), "", NextGuid());
C = pfc.CreateStep("Step_" + (name++), "", NextGuid());
D = pfc.CreateStep("Step_" + (name++), "", NextGuid());
E = pfc.CreateStep("Step_" + (name++), "", NextGuid());
nA = (IPfcNode)A;
nB = (IPfcNode)B;
nC = (IPfcNode)C;
nD = (IPfcNode)D;
nE = (IPfcNode)E;
#endregion Create Nodes
#region Create Structure
pfc.Bind(nA, nB);
pfc.Bind(nB, nE);
pfc.Bind(nA.SuccessorNodes[0], nC);
pfc.Bind(nC, nD);
pfc.Bind(nD, nE.PredecessorNodes[0]);
PfcLinkElementList links = new PfcLinkElementList(pfc.Links);
links.Sort(new Comparison <IPfcLinkElement>(delegate(IPfcLinkElement a, IPfcLinkElement b) {
return(Comparer.Default.Compare(a.Name, b.Name));
}));
System.Reflection.BindingFlags bf = System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.FlattenHierarchy | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance;
foreach (IPfcLinkElement link in links)
{
typeof(PfcElement).GetFields(bf);
typeof(PfcElement).GetField("m_guid", bf).SetValue((PfcElement)link, NextGuid()); // Totally cheating.
}
#endregion Create Structure
return(pfc);
}
private static IPfcNode GetPrevParallelDivergenceNode(IPfcNode origin)
{
IPfcNode ppdn = GetPrevDivergenceNode(origin);
if (ppdn != null)
{
while (ppdn.ElementType.Equals(PfcElementType.Step) || ppdn.PredecessorNodes.Count == 0)
{
ppdn = GetPrevDivergenceNode(ppdn);
if (ppdn == null)
{
break;
}
}
}
return(ppdn);
}