public string GetValidStartEventOrError(string proposedStartEvent, out ProcessError startEventError)
{
startEventError = null;
List <string> possibleStartEvents = _process.StartEvents();
if (!string.IsNullOrEmpty(proposedStartEvent))
{
if (possibleStartEvents.Contains(proposedStartEvent))
{
return(proposedStartEvent);
}
else
{
startEventError = Conflict($"There is no such start event as '{proposedStartEvent}' in the process definition.");
return(null);
}
}
if (possibleStartEvents.Count == 1)
{
return(possibleStartEvents.First());
}
else if (possibleStartEvents.Count > 1)
{
startEventError = Conflict($"There are more than one start events available. Chose one: {possibleStartEvents}");
return(null);
}
else
{
startEventError = Conflict($"There is no start events in process definition. Cannot start process!");
return(null);
}
}
public string GetValidNextElementOrError(string currentElement, out ProcessError nextElementError)
{
nextElementError = null;
string nextElementId = null;
List <string> nextElements = _process.NextElements(currentElement);
if (nextElements.Count > 1)
{
nextElementError = new ProcessError
{
Code = "Conflict",
Text = ($"There is more than one element reachable from element {currentElement}")
};
}
else
{
nextElementId = nextElements.First();
}
return(nextElementId);
}
public string GetValidNextElementOrError(string currentElementId, string proposedElementId, out ProcessError nextElementError)
{
nextElementError = null;
List <string> possibleNextElements = _process.NextElements(currentElementId);
if (!string.IsNullOrEmpty(proposedElementId))
{
if (possibleNextElements.Contains(proposedElementId))
{
return(proposedElementId);
}
else
{
nextElementError = Conflict($"The proposed next element id '{proposedElementId}' is not among the available next process elements");
return(null);
}
}
if (possibleNextElements.Count == 1)
{
return(possibleNextElements.First());
}
if (possibleNextElements.Count > 1)
{
nextElementError = Conflict($"There are more than one outgoing sequence flows, please select one '{possibleNextElements}'");
return(null);
}
if (possibleNextElements.Count == 0)
{
nextElementError = Conflict($"There are no outoging sequence flows from current element. Cannot find next process element. Error in bpmn file!");
return(null);
}
return(null);
}