public override FilterDecision Decide()

in src/log4net/Filter/PropertyFilter.cs [97:161]
42 lines of code
12 McCabe index (conditional complexity)

		public override FilterDecision Decide(LoggingEvent loggingEvent) 
		{
			if (loggingEvent == null)
			{
				throw new ArgumentNullException("loggingEvent");
			}

			// Check if we have a key to lookup the event property value with
			if (m_key == null)
			{
				// We cannot filter so allow the filter chain
				// to continue processing
				return FilterDecision.Neutral;
			}

			// Lookup the string to match in from the properties using 
			// the key specified.
			object msgObj = loggingEvent.LookupProperty(m_key);

			// Use an ObjectRenderer to convert the property value to a string
			string msg = loggingEvent.Repository.RendererMap.FindAndRender(msgObj);

			// Check if we have been setup to filter
			if (msg == null || (m_stringToMatch == null && m_regexToMatch == null))
			{
				// We cannot filter so allow the filter chain
				// to continue processing
				return FilterDecision.Neutral;
			}
    
			// Firstly check if we are matching using a regex
			if (m_regexToMatch != null)
			{
				// Check the regex
				if (m_regexToMatch.Match(msg).Success == false)
				{
					// No match, continue processing
					return FilterDecision.Neutral;
				} 

				// we've got a match
				if (m_acceptOnMatch) 
				{
					return FilterDecision.Accept;
				} 
				return FilterDecision.Deny;
			}
			else if (m_stringToMatch != null)
			{
				// Check substring match
				if (msg.IndexOf(m_stringToMatch) == -1) 
				{
					// No match, continue processing
					return FilterDecision.Neutral;
				} 

				// we've got a match
				if (m_acceptOnMatch) 
				{
					return FilterDecision.Accept;
				} 
				return FilterDecision.Deny;
			}
			return FilterDecision.Neutral;
		}