/// <summary>
/// Returns true if the step has references all the way to the root.
/// </summary>
/// <param name="instance">Instance to check</param>
/// <param name="checkIfPropertyAccessed">Check if property has been accessed on the instance.</param>
/// <returns></returns>
internal bool IsReferencedToRoot(ModelInstance instance, bool checkIfPropertyAccessed)
{
// Exit immediately if the instance is not valid for the current step filter
if (Filter != null && !Filter.IsInstanceOfType(instance))
{
return(false);
}
// Check if the current property has been accessed on the instance
if (checkIfPropertyAccessed && !instance.HasBeenAccessed(Property))
{
return(false);
}
//if there's no previous steps then the step directly applies to the instance
if (PreviousStep == null)
{
return(true);
}
//unless the previous step has references the step is not relevant to the instance.
foreach (ModelReference parentReference in instance.GetInReferences((ModelReferenceProperty)PreviousStep.Property))
{
if (PreviousStep.IsReferencedToRoot(parentReference.In, false))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Recursively walks up the path the current step is a member of until the
/// root is reached and then initiates path change notification events.
/// </summary>
/// <param name="instance"></param>
internal void Notify(ModelInstance instance)
{
// Exit immediately if the instance is not valid for the current step filter
if (Filter != null && !Filter.IsInstanceOfType(instance))
{
return;
}
// Keep walking if there are more tokens
if (PreviousStep != null)
{
foreach (ModelReference parentReference in instance.GetInReferences((ModelReferenceProperty)PreviousStep.Property))
{
PreviousStep.Notify(parentReference.In);
}
}
// Otherwise, notify the path with the first instance instance
else
{
Path.Notify(instance);
}
}
/// <summary>
/// Recursively walks up the path the current step is a member of until the
/// root is reached and then initiates path change notification events.
/// </summary>
/// <param name="instance"></param>
internal void Notify(ModelInstance instance)
{
// Exit immediately if the instance is not valid for the current step filter
if (Filter != null && !Filter.IsInstanceOfType(instance))
return;
// Keep walking if there are more tokens
if (PreviousStep != null)
{
foreach (ModelReference parentReference in instance.GetInReferences((ModelReferenceProperty)PreviousStep.Property))
PreviousStep.Notify(parentReference.In);
}
// Otherwise, notify the path with the first instance instance
else
Path.Notify(instance);
}
/// <summary>
/// Returns true if the step has references all the way to the root.
/// </summary>
/// <param name="instance">Instance to check</param>
/// <param name="checkIfPropertyAccessed">Check if property has been accessed on the instance.</param>
/// <returns></returns>
internal bool IsReferencedToRoot(ModelInstance instance, bool checkIfPropertyAccessed)
{
// Exit immediately if the instance is not valid for the current step filter
if (Filter != null && !Filter.IsInstanceOfType(instance))
return false;
// Check if the current property has been accessed on the instance
if (checkIfPropertyAccessed && !instance.HasBeenAccessed(Property))
return false;
//if there's no previous steps then the step directly applies to the instance
if (PreviousStep == null)
return true;
//unless the previous step has references the step is not relevant to the instance.
foreach (ModelReference parentReference in instance.GetInReferences((ModelReferenceProperty)PreviousStep.Property))
{
if (PreviousStep.IsReferencedToRoot(parentReference.In, false))
return true;
}
return false;
}