///<summary>
///Adds another ProducerConsumer to the list of processing consumers.
///<para>This method will throw a CycleException if a consumer would be tasked to be its own producer.</para>
///</summary>
public void AddConsumer(GhostLine <T> consumer)
{
if (AncestorDuplicate(consumer) || DescendantDuplicate(consumer))
{
throw new CycleException("Adding this consumer would create a cycle.");
}
consumer.Parent = this;
Consumers.Add(consumer);
}
private bool AncestorDuplicate(GhostLine <T> candidate)
{
if (candidate.Parent == null)
{
return(false);
}
if (candidate.Parent == this)
{
return(true);
}
else
{
return(AncestorDuplicate(candidate.Parent));
}
}
private bool DescendantDuplicate(GhostLine <T> candidate)
{
if (candidate == this)
{
return(true);
}
else
{
foreach (var child in candidate.Consumers)
{
if (DescendantDuplicate(child))
{
return(true);
}
}
}
return(false);
}