AppenderPtr PropertyConfigurator::parseAppender()

in src/main/cpp/propertyconfigurator.cpp [454:587]
113 lines of code
20 McCabe index (conditional complexity)

AppenderPtr PropertyConfigurator::parseAppender(
	helpers::Properties& props, const LogString& appenderName)
{
	AppenderPtr appender = registryGet(appenderName);

	if (appender != 0)
	{
		if (LogLog::isDebugEnabled())
		{
			LogLog::debug((LogString) LOG4CXX_STR("Appender \"")
				+ appenderName + LOG4CXX_STR("\" was already parsed."));
		}

		return appender;
	}

	static const WideLife<LogString> APPENDER_PREFIX(LOG4CXX_STR("log4j.appender."));

	// Appender was not previously initialized.
	LogString prefix = APPENDER_PREFIX.value() + appenderName;
	LogString layoutPrefix = prefix + LOG4CXX_STR(".layout");

	std::shared_ptr<Object> obj =
		OptionConverter::instantiateByKey(
			props, prefix, Appender::getStaticClass(), 0);
	appender = LOG4CXX_NS::cast<Appender>( obj );

	// Map obsolete DailyRollingFileAppender property configuration
	if (!appender &&
		StringHelper::endsWith(OptionConverter::findAndSubst(prefix, props), LOG4CXX_STR("DailyRollingFileAppender")))
	{
		appender = std::make_shared<RollingFileAppender>();
		auto datePattern = OptionConverter::findAndSubst(prefix + LOG4CXX_STR(".datePattern"), props);
		if (!datePattern.empty())
			props.put(prefix + LOG4CXX_STR(".fileDatePattern"), datePattern);
	}

	if (!appender)
	{
		LogLog::error((LogString) LOG4CXX_STR("Could not instantiate appender named \"")
			+ appenderName + LOG4CXX_STR("\"."));
		return 0;
	}

	appender->setName(appenderName);

	if (appender->instanceof(OptionHandler::getStaticClass()))
	{
		Pool p;

		if (appender->requiresLayout())
		{
			LayoutPtr layout;
			std::shared_ptr<Object> obj =
				OptionConverter::instantiateByKey(
					props, layoutPrefix, Layout::getStaticClass(), 0);
			layout = LOG4CXX_NS::cast<Layout>( obj );

			if (layout != 0)
			{
				appender->setLayout(layout);
				if (LogLog::isDebugEnabled())
				{
					LogLog::debug((LogString) LOG4CXX_STR("Parsing layout options for \"")
						+ appenderName + LOG4CXX_STR("\"."));
				}

				PropertySetter::setProperties(layout, props, layoutPrefix + LOG4CXX_STR("."), p);
				if (LogLog::isDebugEnabled())
				{
					LogLog::debug((LogString) LOG4CXX_STR("End of parsing for \"")
						+ appenderName +  LOG4CXX_STR("\"."));
				}
			}
		}

		RollingFileAppenderPtr rolling = LOG4CXX_NS::cast<rolling::RollingFileAppender>(appender);
		if (rolling)
		{
			LogString rollingPolicyKey = prefix + LOG4CXX_STR(".rollingPolicy");
			if (!OptionConverter::findAndSubst(rollingPolicyKey, props).empty())
			{
				RollingPolicyPtr rollingPolicy;
				std::shared_ptr<Object> rolling_obj =
					OptionConverter::instantiateByKey(
						props, rollingPolicyKey, RollingPolicy::getStaticClass(), 0);
				rollingPolicy = LOG4CXX_NS::cast<RollingPolicy>( rolling_obj );
				if(rollingPolicy)
				{
					rolling->setRollingPolicy(rollingPolicy);

					if (LogLog::isDebugEnabled())
					{
						LogLog::debug((LogString) LOG4CXX_STR("Parsing rolling policy options for \"")
							+ appenderName + LOG4CXX_STR("\"."));
					}
					PropertySetter::setProperties(rollingPolicy, props, rollingPolicyKey + LOG4CXX_STR("."), p);
				}
			}

			LogString triggeringPolicyKey = prefix + LOG4CXX_STR(".triggeringPolicy");
			if (!OptionConverter::findAndSubst(triggeringPolicyKey, props).empty())
			{
				TriggeringPolicyPtr triggeringPolicy;
				std::shared_ptr<Object> triggering_obj =
					OptionConverter::instantiateByKey(
						props, triggeringPolicyKey, TriggeringPolicy::getStaticClass(), 0);
				triggeringPolicy = LOG4CXX_NS::cast<TriggeringPolicy>( triggering_obj );
				if(triggeringPolicy)
				{
					rolling->setTriggeringPolicy(triggeringPolicy);

					if (LogLog::isDebugEnabled())
					{
						LogLog::debug((LogString) LOG4CXX_STR("Parsing triggering policy options for \"")
							+ appenderName + LOG4CXX_STR("\"."));
					}
					PropertySetter::setProperties(triggeringPolicy, props, triggeringPolicyKey + LOG4CXX_STR("."), p);
				}
			}
		}

		PropertySetter::setProperties(appender, props, prefix + LOG4CXX_STR("."), p);
		if (LogLog::isDebugEnabled())
		{
			LogLog::debug((LogString) LOG4CXX_STR("Parsed \"")
				+ appenderName + LOG4CXX_STR("\" options."));
		}
	}

	registryPut(appender);

	return appender;
}