Task StateAccessor <TInstance> .Set(InstanceContext <TInstance> context, State <TInstance> state)
{
if (state == null)
{
throw new ArgumentNullException(nameof(state));
}
var previous = _property.Get(context.Instance);
if (state.Name.Equals(previous))
{
return(TaskUtil.Completed);
}
_property.Set(context.Instance, state.Name);
State <TInstance> previousState = null;
if (previous != null)
{
previousState = _machine.GetState(previous);
}
return(_observer.StateChanged(context, state, previousState));
}
Task StateAccessor <TInstance> .Set(InstanceContext <TInstance> context, State <TInstance> state)
{
if (state == null)
{
throw new ArgumentNullException(nameof(state));
}
var stateIndex = _index[state.Name];
var previousIndex = _property.Get(context.Instance);
if (stateIndex == previousIndex)
{
return(TaskUtil.Completed);
}
_property.Set(context.Instance, stateIndex);
var previousState = _index[previousIndex];
return(_observer.StateChanged(context, state, previousState));
}
