protected override void Initialize(IServiceProvider provider)
{
base.Initialize(provider);
ActivityExecutionContext context = (ActivityExecutionContext)provider;
StateActivity rootState = StateMachineHelpers.GetRootState(this);
if (!StateMachineHelpers.IsStateMachine(rootState))
{
throw new InvalidOperationException(SR.GetError_StateActivityMustBeContainedInAStateMachine());
}
string initialStateName = StateMachineHelpers.GetInitialStateName(this);
if (String.IsNullOrEmpty(initialStateName))
{
throw new InvalidOperationException(SR.GetError_CannotExecuteStateMachineWithoutInitialState());
}
//
if (this.QualifiedName != initialStateName)
{
StateMachineSubscriptionManager.DisableStateWorkflowQueues(context, this);
}
}
private static void ValidateInitialState(StateActivity state, ValidationErrorCollection validationErrors)
{
string initialStateName = StateMachineHelpers.GetInitialStateName(state);
if (string.IsNullOrEmpty(initialStateName))
{
if (state.Activities.Count > 0)
{
validationErrors.Add(new ValidationError(SR.GetString("Error_PropertyNotSet", new object[] { "InitialStateName" }), 0x116, false, "InitialStateName"));
}
}
else
{
StateActivity activity = StateMachineHelpers.FindStateByName(state, initialStateName);
if (activity == null)
{
validationErrors.Add(new ValidationError(SR.GetError_InitialStateMustPointToAState(), 0x5f5, false, "InitialStateName"));
}
else
{
if (!StateMachineHelpers.IsLeafState(activity))
{
validationErrors.Add(new ValidationError(SR.GetError_InitialStateMustPointToALeafNodeState(), 0x5f7, false, "InitialStateName"));
}
string completedStateName = StateMachineHelpers.GetCompletedStateName(state);
if (initialStateName == completedStateName)
{
validationErrors.Add(new ValidationError(SR.GetError_InitialStateMustBeDifferentThanCompletedState(), 0x62c, false, "InitialStateName"));
}
}
}
}
private static void ValidateInitialState(StateActivity state, ValidationErrorCollection validationErrors)
{
string initialStateName = StateMachineHelpers.GetInitialStateName(state);
if (String.IsNullOrEmpty(initialStateName))
{
if (state.Activities.Count > 0)
{
// we only require an initial state if the state machine is
// not empty
validationErrors.Add(new ValidationError(
SR.GetString(SR.Error_PropertyNotSet, StateMachineWorkflowActivity.InitialStateNamePropertyName),
ErrorNumbers.Error_PropertyNotSet, false,
StateMachineWorkflowActivity.InitialStateNamePropertyName));
}
}
else
{
StateActivity initialState = StateMachineHelpers.FindStateByName(
state,
initialStateName);
if (initialState == null)
{
validationErrors.Add(new ValidationError(
SR.GetError_InitialStateMustPointToAState(),
ErrorNumbers.Error_InitialStateMustPointToAState,
false,
StateMachineWorkflowActivity.InitialStateNamePropertyName));
}
else
{
if (!StateMachineHelpers.IsLeafState(initialState))
{
validationErrors.Add(new ValidationError(
SR.GetError_InitialStateMustPointToALeafNodeState(),
ErrorNumbers.Error_InitialStateMustPointToALeafNodeState,
false,
StateMachineWorkflowActivity.InitialStateNamePropertyName));
}
// InitialState cannot be the completed state
string completedStateName = StateMachineHelpers.GetCompletedStateName(state);
if (initialStateName == completedStateName)
{
validationErrors.Add(new ValidationError(
SR.GetError_InitialStateMustBeDifferentThanCompletedState(),
ErrorNumbers.Error_InitialStateMustBeDifferentThanCompletedState,
false,
StateMachineWorkflowActivity.InitialStateNamePropertyName));
}
}
}
}
private void ExecuteRootState(ActivityExecutionContext context)
{
StateActivity state = (StateActivity)context.Activity;
StateMachineExecutionState executionState = new StateMachineExecutionState(this.WorkflowInstanceId);
executionState.SchedulerBusy = false;
state.SetValue(StateActivity.StateMachineExecutionStateProperty, executionState);
executionState.SubscriptionManager.CreateSetStateEventQueue(context);
string initialStateName = StateMachineHelpers.GetInitialStateName(state);
executionState.CalculateStateTransition(this, initialStateName);
executionState.ProcessActions(context);
}
