private static void InternalConfigure()

in src/log4net/Config/XmlConfigurator.cs [700:777]

• 59 lines of code
• 9 McCabe index (conditional complexity)

		private static void InternalConfigure(ILoggerRepository repository, Stream configStream)
		{
			LogLog.Debug(declaringType, "configuring repository [" + repository.Name + "] using stream");

			if (configStream == null)
			{
				LogLog.Error(declaringType, "Configure called with null 'configStream' parameter");
			}
			else
			{
				// Load the config file into a document
#if NETSTANDARD1_3
				XmlDocument doc = new XmlDocument();
#else
				XmlDocument doc = new XmlDocument { XmlResolver = null };
#endif
				try
				{
#if (NETCF)
					// Create a text reader for the file stream
					XmlTextReader xmlReader = new XmlTextReader(configStream);
#elif NET_2_0 || NETSTANDARD
					// Allow the DTD to specify entity includes
					XmlReaderSettings settings = new XmlReaderSettings();
					// .NET 4.0 warning CS0618: 'System.Xml.XmlReaderSettings.ProhibitDtd'
					// is obsolete: 'Use XmlReaderSettings.DtdProcessing property instead.'
#if NETSTANDARD1_3 // TODO DtdProcessing.Parse not yet available (https://github.com/dotnet/corefx/issues/4376)
					settings.DtdProcessing = DtdProcessing.Ignore;
#elif !NET_4_0 && !MONO_4_0 && !NETSTANDARD2_0
					settings.ProhibitDtd = true;
#else
					settings.DtdProcessing = DtdProcessing.Ignore;
#endif

					// Create a reader over the input stream
					using XmlReader xmlReader = XmlReader.Create(configStream, settings);
#else
					// Create a validating reader around a text reader for the file stream
					using XmlValidatingReader xmlReader = new XmlValidatingReader(new XmlTextReader(configStream));

					// Specify that the reader should not perform validation, but that it should
					// expand entity refs.
					xmlReader.ValidationType = ValidationType.None;
					xmlReader.EntityHandling = EntityHandling.ExpandEntities;
#endif

					// load the data into the document
					doc.Load(xmlReader);
				}
				catch(Exception ex)
				{
					LogLog.Error(declaringType, "Error while loading XML configuration", ex);

					// The document is invalid
					doc = null;
				}

				if (doc != null)
				{
					LogLog.Debug(declaringType, "loading XML configuration");

					// Configure using the 'log4net' element
					XmlNodeList configNodeList = doc.GetElementsByTagName("log4net");
					if (configNodeList.Count == 0)
					{
						LogLog.Debug(declaringType, "XML configuration does not contain a <log4net> element. Configuration Aborted.");
					}
					else if (configNodeList.Count > 1)
					{
						LogLog.Error(declaringType, "XML configuration contains [" + configNodeList.Count + "] <log4net> elements. Only one is allowed. Configuration Aborted.");
					}
					else
					{
						InternalConfigureFromXml(repository, configNodeList[0] as XmlElement);
					}
				}
			}
		}