private void UpdateParents()

in src/log4net/Repository/Hierarchy/Hierarchy.cs [838:891]
46 lines of code
7 McCabe index (conditional complexity)

		private void UpdateParents(Logger log) 
		{
			string name = log.Name;
			int length = name.Length;
			bool parentFound = false;
	
			// if name = "w.x.y.z", loop through "w.x.y", "w.x" and "w", but not "w.x.y.z" 
			for(int i = name.LastIndexOf('.', length-1); i >= 0; i = name.LastIndexOf('.', i-1))  
			{
				string substr = name.Substring(0, i);

				LoggerKey key = new LoggerKey(substr); // simple constructor
				Object node = m_ht[key];
				// Create a provision node for a future parent.
				if (node == null) 
				{
					ProvisionNode pn = new ProvisionNode(log);
					m_ht[key] = pn;
				} 
				else
				{
					Logger nodeLogger = node as Logger;
					if (nodeLogger != null)
					{
						parentFound = true;
						log.Parent = nodeLogger;
						break; // no need to update the ancestors of the closest ancestor
					}
					else
					{
						ProvisionNode nodeProvisionNode = node as ProvisionNode;
						if (nodeProvisionNode != null)
						{
							nodeProvisionNode.Add(log);
						}
						else
						{
							LogLog.Error(declaringType, "Unexpected object type ["+node.GetType()+"] in ht.", new LogException());
						}
					} 
				}
				if (i == 0) {
				    // logger name starts with a dot
				    // and we've hit the start
				    break;
				}
			}

			// If we could not find any existing parents, then link with root.
			if (!parentFound) 
			{
				log.Parent = this.Root;
			}
		}