public ActivityDescriptor <TActivity> Fork <TActivity>() where TActivity : class, IActivity
{
var activityDescriptor = new ActivityDescriptor <TActivity>();
myForks.Add(activityDescriptor);
return(activityDescriptor);
}
internal ActivityBinder(
[NotNull] ActivityDescriptor <TActivity> activityDescriptor,
[NotNull] Expression <Func <TActivity, TProperty> > propertyExpression)
{
propertyExpression.IsValid().AssertTrue("Invalid property expression");
myActivityDescriptor = activityDescriptor;
myPropertyName = propertyExpression.GetPropertyName();
myPropertySetter = propertyExpression.ConvertToSetter();
}
public static Result <T> Of <TActivity>([NotNull] ActivityDescriptor <TActivity> descriptor)
where TActivity : class, IActivity <T>
{
descriptor.AssertNotNull("descriptor != null");
var result = new Result <T>(descriptor.NotNull().Id);
descriptor.RegisterActivityTaskHandler(task => HandleCompletedTask(task, result));
return(result);
}
public static void OnCompletionAssign <TActivity, TVariable>(
[NotNull] this ActivityDescriptor <TActivity> descriptor, [NotNull] Variable <TVariable> variable, TVariable value)
where TActivity : class, IActivity
{
descriptor.AssertNotNull("descriptor != null");
variable.AssertNotNull("variable != null");
descriptor.RegisterActivityTaskHandler(t =>
{
if (t.Status == TaskStatus.RanToCompletion)
{
variable.Assign(value);
}
});
}
public static void BindToResultOf <TVariable, TActivity>(
[NotNull] this Variable <TVariable> variable, [NotNull] ActivityDescriptor <TActivity> descriptor)
where TActivity : class, IActivity <TVariable>
{
variable.AssertNotNull("variable != null");
descriptor.AssertNotNull("descriptor != null");
descriptor.RegisterActivityTaskHandler(t =>
{
if (t.Status == TaskStatus.RanToCompletion)
{
variable.Assign((TVariable)t.Result);
}
});
}
public static void OnCompletionUpdate <TActivity, TActivityResult, TVariable>(
[NotNull] this ActivityDescriptor <TActivity> descriptor, [NotNull] Variable <TVariable> variable,
[NotNull] Func <TVariable, TActivityResult, TVariable> updateFunc)
where TActivity : class, IActivity <TActivityResult>
{
descriptor.AssertNotNull("descriptor != null");
variable.AssertNotNull("variable != null");
descriptor.RegisterActivityTaskHandler(t =>
{
if (t.Status == TaskStatus.RanToCompletion)
{
variable.Update(updateFunc, (TActivityResult)t.Result);
}
});
}
public void ToResultOf <TAnotherActivity>([NotNull] ActivityDescriptor <TAnotherActivity> descriptor)
where TAnotherActivity : class, IActivity <TProperty>
{
descriptor.AssertNotNull("descriptor != null");
var bindingInfo = new ResultBinding <TProperty, TAnotherActivity>(myPropertyName, descriptor);
myActivityDescriptor.AddBindingInfo(bindingInfo);
ActivityTaskHandler handler = task =>
{
if (task.Status == TaskStatus.RanToCompletion)
{
myActivityDescriptor.AddInitializer(a => SetProperty(a, task.Result));
}
};
descriptor.RegisterActivityTaskHandler(handler);
}
public ResultBinding([NotNull] string propertyName, [NotNull] ActivityDescriptor <TActivity> activity)
{
PropertyName = propertyName.NotNullOrEmpty("propertyName");
Activity = activity.NotNull();
}
internal ActivityNode()
{
myActivityDescriptor = new ActivityDescriptor <TActivity>(Id);
}
