//public StateMachine()
//{
//}
public void SetStateForObject <StateEnum>(T entity, Enum state) where StateEnum : struct
{
IStateObject e = entity as IStateObject;
Transition <T> transition = Transitions.Where(t => t.FromState.Equals(StateUtils.GetStateStringAsEnum <StateEnum>(e.GetState())) && t.ToState.Equals(state)).FirstOrDefault();
if (transition != null)
{
if (transition.Guards != null)
{
foreach (Func <T, TryGuardResponse> guard in transition.Guards)
{
TryGuardResponse tgr = guard.Invoke(entity);
if (!tgr.Success)
{
throw new Exception("SetStateFailedError");
}
}
}
e.SetState(state.ToString());
//Effect
if (transition.Effect != null)
{
transition.Effect.Invoke(entity);
}
}
else
{
throw new Exception("Could not find transition from state " + e.GetState() + " to state " + state.ToString());
}
}
public bool CanSetState <StateEnum>(T entity, Enum state) where StateEnum : struct
{
IStateObject e = entity as IStateObject;
Transition <T> transition = Transitions.Where(t =>
t.FromState.Equals(StateUtils.GetStateStringAsEnum <StateEnum>(e.GetState())) && t.ToState.Equals(state)).FirstOrDefault();
if (transition != null)
{
if (transition.Guards != null)
{
foreach (Func <T, TryGuardResponse> guard in transition.Guards)
{
TryGuardResponse tgr = guard.Invoke(entity);
if (!tgr.Success)
{
return(false);
}
}
}
return(true);
}
return(false);
}
public bool TrySetStateForObject <StateEnum>(T entity, Enum state, out List <KeyValuePair <string, string> > errorList) where StateEnum : struct
{
errorList = new List <KeyValuePair <string, string> >();
IStateObject e = entity as IStateObject;
Transition <T> transition = Transitions.Where(t => t.FromState.Equals(StateUtils.GetStateStringAsEnum <StateEnum>(e.GetState())) && t.ToState.Equals(state)).FirstOrDefault();
if (transition != null)
{
if (transition.Guards != null)
{
foreach (Func <T, TryGuardResponse> guard in transition.Guards)
{
TryGuardResponse tgr = guard.Invoke(entity);
if (!tgr.Success)
{
errorList.Add(tgr.Error);
}
}
}
if (errorList.Count == 0)
{
e.SetState(state.ToString());
//Effect
if (transition.Effect != null)
{
transition.Effect.Invoke(entity);
}
return(true);
}
}
else
{
errorList.Add(new KeyValuePair <string, string>("NoTransitionError", "Could not find transition from state " + e.GetState() + " to state " + state.ToString()));
}
return(false);
}