public void Configure()

in src/log4net/Repository/Hierarchy/XmlHierarchyConfigurator.cs [82:224]
109 lines of code
26 McCabe index (conditional complexity)

		public void Configure(XmlElement element) 
		{
			if (element == null || m_hierarchy == null)
			{
                return;
			}

			string rootElementName = element.LocalName;

			if (rootElementName != CONFIGURATION_TAG)
			{
				LogLog.Error(declaringType, "Xml element is - not a <" + CONFIGURATION_TAG + "> element.");
                return;
			}

            if (!LogLog.EmitInternalMessages)
            {
                // Look for a emitDebug attribute to enable internal debug
                string emitDebugAttribute = element.GetAttribute(EMIT_INTERNAL_DEBUG_ATTR);
                LogLog.Debug(declaringType, EMIT_INTERNAL_DEBUG_ATTR + " attribute [" + emitDebugAttribute + "].");

                if (emitDebugAttribute.Length > 0 && emitDebugAttribute != "null")
                {
                    LogLog.EmitInternalMessages = OptionConverter.ToBoolean(emitDebugAttribute, true);
                }
                else
                {
                    LogLog.Debug(declaringType, "Ignoring " + EMIT_INTERNAL_DEBUG_ATTR + " attribute.");
                }
            }

		    if (!LogLog.InternalDebugging)
			{
				// Look for a debug attribute to enable internal debug
				string debugAttribute = element.GetAttribute(INTERNAL_DEBUG_ATTR);
				LogLog.Debug(declaringType, INTERNAL_DEBUG_ATTR+" attribute [" + debugAttribute + "].");

				if (debugAttribute.Length>0 && debugAttribute != "null") 
				{	  
					LogLog.InternalDebugging = OptionConverter.ToBoolean(debugAttribute, true);
				}
				else 
				{
					LogLog.Debug(declaringType, "Ignoring " + INTERNAL_DEBUG_ATTR + " attribute.");
				}

				string confDebug = element.GetAttribute(CONFIG_DEBUG_ATTR);
				if (confDebug.Length>0 && confDebug != "null")
				{	  
					LogLog.Warn(declaringType, "The \"" + CONFIG_DEBUG_ATTR + "\" attribute is deprecated.");
					LogLog.Warn(declaringType, "Use the \"" + INTERNAL_DEBUG_ATTR + "\" attribute instead.");
					LogLog.InternalDebugging = OptionConverter.ToBoolean(confDebug, true);
				}
			}

			// Default mode is merge
			ConfigUpdateMode configUpdateMode = ConfigUpdateMode.Merge;

			// Look for the config update attribute
			string configUpdateModeAttribute = element.GetAttribute(CONFIG_UPDATE_MODE_ATTR);
			if (configUpdateModeAttribute != null && configUpdateModeAttribute.Length > 0)
			{
				// Parse the attribute
				try
				{
					configUpdateMode = (ConfigUpdateMode)OptionConverter.ConvertStringTo(typeof(ConfigUpdateMode), configUpdateModeAttribute);
				}
				catch
				{
					LogLog.Error(declaringType, "Invalid " + CONFIG_UPDATE_MODE_ATTR + " attribute value [" + configUpdateModeAttribute + "]");
				}
			}

			// IMPL: The IFormatProvider argument to Enum.ToString() is deprecated in .NET 2.0
			LogLog.Debug(declaringType, "Configuration update mode [" + configUpdateMode.ToString() + "].");

			// Only reset configuration if overwrite flag specified
			if (configUpdateMode == ConfigUpdateMode.Overwrite)
			{
				// Reset to original unset configuration
				m_hierarchy.ResetConfiguration();
				LogLog.Debug(declaringType, "Configuration reset before reading config.");
			}

			/* Building Appender objects, placing them in a local namespace
			   for future reference */

			/* Process all the top level elements */

			foreach (XmlNode currentNode in element.ChildNodes)
			{
				if (currentNode.NodeType == XmlNodeType.Element) 
				{
					XmlElement currentElement = (XmlElement)currentNode;

					if (currentElement.LocalName == LOGGER_TAG)
					{
						ParseLogger(currentElement);
					} 
					else if (currentElement.LocalName == CATEGORY_TAG)
					{
						// TODO: deprecated use of category
						ParseLogger(currentElement);
					} 
					else if (currentElement.LocalName == ROOT_TAG)
					{
						ParseRoot(currentElement);
					} 
					else if (currentElement.LocalName == RENDERER_TAG)
					{
						ParseRenderer(currentElement);
					}
					else if (currentElement.LocalName == APPENDER_TAG)
					{
						// We ignore appenders in this pass. They will
						// be found and loaded if they are referenced.
					}
					else
					{
						// Read the param tags and set properties on the hierarchy
						SetParameter(currentElement, m_hierarchy);
					}
				}
			}

			// Lastly set the hierarchy threshold
			string thresholdStr = element.GetAttribute(THRESHOLD_ATTR);
			LogLog.Debug(declaringType, "Hierarchy Threshold [" + thresholdStr + "]");
			if (thresholdStr.Length > 0 && thresholdStr != "null") 
			{
				Level thresholdLevel = (Level) ConvertStringTo(typeof(Level), thresholdStr);
				if (thresholdLevel != null)
				{
					m_hierarchy.Threshold = thresholdLevel;
				}
				else
				{
					LogLog.Warn(declaringType, "Unable to set hierarchy threshold using value [" + thresholdStr + "] (with acceptable conversion types)");
				}
			}

			// Done reading config
		}