public TransitionResult Transition(string name)
{
WorkflowTransition t = FindTransitionByName(name);
if (t == null)
{
throw new ArgumentException("WorkflowGraph.Transition: no transition with name " + name);
}
return(Transition(t));
}
public TransitionResult Transition(WorkflowTransition t)
{
if (ActiveState != t.From)
{
if (LogF != null)
{
LogF("[WorfklowGraph.Transition] cannot from {0} to {1} along {2} because in state {3}!", t.From.Name, t.To.Name, t.Name, ActiveState.Name);
}
return(TransitionResult.Failed_InvalidPrecondition);
}
foreach (var p in t.Preconditions)
{
bool r = p();
if (r == false)
{
if (LogF != null)
{
LogF("[WorfklowGraph.Transition] precondition failed on transition {0} from {1} to {2}!", t.Name, ActiveState.Name, t.To.Name);
}
return(TransitionResult.Failed_InvalidPrecondition);
}
}
foreach (Action b in t.BeforeTransition)
{
b();
}
var prevState = ActiveState;
ActiveState.OnDeactivated();
ActiveState = t.To;
ActiveState.OnActivated();
foreach (Action a in t.AfterTransition)
{
a();
}
if (LogF != null)
{
LogF("[WorfklowGraph.Transition] transitioned from {0} to {1} along {2}!", t.From.Name, t.To.Name, t.Name);
}
OnStateTransition?.Invoke(prevState, ActiveState);
return(TransitionResult.Ok);
}
public TransitionResult TransitionToState(WorkflowState newState)
{
WorkflowTransition t = FindTransition(ActiveState, newState);
if (t == null)
{
if (LogF != null)
{
LogF("[WorfklowGraph.TransitionToState] ANONYMOUS transition from {0} to {1} does not exist!", ActiveState.Name, newState.Name);
}
return(TransitionResult.Failed_NoTransition);
}
return(Transition(t));
}
public WorkflowTransition AddTransition(WorkflowState from, WorkflowState to, string name)
{
if (FindTransitionByName(name) != null)
{
throw new InvalidOperationException("WorkflowGraph.AddTransition: transition " + name + " from " + from.Name + " to " + to.Name + " already exists!");
}
WorkflowTransition t = new WorkflowTransition()
{
From = from, To = to, Name = name
};
Transitions[name] = t;
return(t);
}
public bool CanTransition(WorkflowTransition t)
{
if (ActiveState != t.From)
{
return(false);
}
foreach (var p in t.Preconditions)
{
bool r = p();
if (r == false)
{
return(false);
}
}
return(true);
}
public void AddTransition(WorkflowState fromState, WorkflowState toState, string identifier,
Func <bool> precondition, Action beforeF, Action afterF)
{
WorkflowTransition transition = Graph.AddTransition(fromState, toState, identifier);
if (precondition != null)
{
transition.Preconditions.Add(precondition);
}
if (beforeF != null)
{
transition.BeforeTransition.Add(beforeF);
}
if (afterF != null)
{
transition.AfterTransition.Add(afterF);
}
}
public bool CanTransition(string transitionName)
{
WorkflowTransition t = FindTransitionByName(transitionName);
return((t == null) ? false : CanTransition(t));
}
