protected IAppender ParseAppender()

in src/log4net/Repository/Hierarchy/XmlHierarchyConfigurator.cs [295:362]
56 lines of code
8 McCabe index (conditional complexity)

		protected IAppender ParseAppender(XmlElement appenderElement) 
		{
			string appenderName = appenderElement.GetAttribute(NAME_ATTR);
			string typeName = appenderElement.GetAttribute(TYPE_ATTR);

			LogLog.Debug(declaringType, "Loading Appender [" + appenderName + "] type: [" + typeName + "]");
			try 
			{
#if NETSTANDARD1_3
				IAppender appender = (IAppender)Activator.CreateInstance(SystemInfo.GetTypeFromString(this.GetType().GetTypeInfo().Assembly, typeName, true, true));
#else
				IAppender appender = (IAppender)Activator.CreateInstance(SystemInfo.GetTypeFromString(typeName, true, true));
#endif
				appender.Name = appenderName;

				foreach (XmlNode currentNode in appenderElement.ChildNodes)
				{
					/* We're only interested in Elements */
					if (currentNode.NodeType == XmlNodeType.Element) 
					{
						XmlElement currentElement = (XmlElement)currentNode;

						// Look for the appender ref tag
						if (currentElement.LocalName == APPENDER_REF_TAG)
						{
							string refName = currentElement.GetAttribute(REF_ATTR);

							IAppenderAttachable appenderContainer = appender as IAppenderAttachable;
							if (appenderContainer != null) 
							{
								LogLog.Debug(declaringType, "Attaching appender named [" + refName + "] to appender named [" + appender.Name + "].");

								IAppender referencedAppender = FindAppenderByReference(currentElement);
								if (referencedAppender != null)
								{
									appenderContainer.AddAppender(referencedAppender);
								}
							} 
							else 
							{
								LogLog.Error(declaringType, "Requesting attachment of appender named ["+refName+ "] to appender named [" + appender.Name + "] which does not implement log4net.Core.IAppenderAttachable.");
							}
						}
						else
						{
							// For all other tags we use standard set param method
							SetParameter(currentElement, appender);
						}
					}
				}

				IOptionHandler optionHandler = appender as IOptionHandler;
				if (optionHandler != null) 
				{
					optionHandler.ActivateOptions();
				}

				LogLog.Debug(declaringType, "Created Appender [" + appenderName + "]");	
				return appender;
			}
			catch (Exception ex) 
			{
				// Yes, it's ugly.  But all exceptions point to the same problem: we can't create an Appender

				LogLog.Error(declaringType, "Could not create Appender [" + appenderName + "] of type [" + typeName + "]. Reported error follows.", ex);
				return null;
			}
		}