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);
}
public PfcValidator(IProcedureFunctionChart pfc)
{
m_errorList = new List <PfcValidationError>();
m_pfc = (IProcedureFunctionChart)pfc.Clone();
Reduce();
try
{
m_pfc.UpdateStructure();
Validate();
}
catch (PFCValidityException)
{
m_pfcIsValid = false;
}
}