private function doConfigure($url, Ideasa_Log4php_LoggerHierarchy $hierarchy)
 {
     if (!is_array($url)) {
         $config = (require $url);
     } else {
         $config = $url;
     }
     // set threshold
     if (isset($config['threshold'])) {
         $hierarchy->setThreshold(Ideasa_Log4php_Helpers_LoggerOptionConverter::toLevel($config['threshold'], Ideasa_Log4php_LoggerLevel::getLevelAll()));
     }
     // add renderes
     if (isset($config['renderers'])) {
         foreach ($config['renderers'] as $renderedClass => $renderingClass) {
             $hierarchy->getRendererMap()->addRenderer($renderedClass, $renderingClass);
         }
     }
     // parse and create appenders
     if (isset($config['appenders'])) {
         foreach ($config['appenders'] as $appenderName => $appenderProperties) {
             $appender = Ideasa_Log4php_LoggerAppenderPool::getAppenderFromPool($appenderName, $appenderProperties['class']);
             // unset so that the property wont be drawn up again
             unset($appenderProperties['class']);
             if ($appender->requiresLayout()) {
                 if (isset($appenderProperties['layout'])) {
                     if (isset($appenderProperties['layout']['class']) and !empty($appenderProperties['layout']['class'])) {
                         $layoutClass = $appenderProperties['layout']['class'];
                     } else {
                         $layoutClass = 'Ideasa_Log4php_Layouts_LoggerLayoutSimple';
                     }
                     $layout = Ideasa_Log4php_LoggerReflectionUtils::createObject($layoutClass);
                     if ($layout === null) {
                         $layout = Ideasa_Log4php_LoggerReflectionUtils::createObject('Ideasa_Log4php_Layouts_LoggerLayoutSimple');
                     }
                     if (isset($appenderProperties['file']) && method_exists($appender, 'setFileName')) {
                         $appender->setFile($appenderProperties['file'], true);
                     }
                     if ($layout instanceof Ideasa_Log4php_Layouts_LoggerLayoutPattern) {
                         $layout->setConversionPattern($appenderProperties['layout']['conversionPattern']);
                     }
                     $appender->setLayout($layout);
                     // unset so that the property wont be drawn up again
                     unset($appenderProperties['layout']);
                 } else {
                     // TODO: throw exception?
                 }
             }
             // set remaining properties and activate appender
             $setter = new Ideasa_Log4php_LoggerReflectionUtils($appender);
             foreach ($appenderProperties as $key => $val) {
                 $setter->setProperty($key, $val);
             }
             $setter->activate();
         }
     }
     // parse and create root logger
     if (isset($config['rootLogger'])) {
         $rootLogger = $hierarchy->getRootLogger();
         if (isset($config['rootLogger']['level'])) {
             $rootLogger->setLevel(Ideasa_Log4php_Helpers_LoggerOptionConverter::toLevel($config['rootLogger']['level'], Ideasa_Log4php_LoggerLevel::getLevelDebug()));
             if (isset($config['rootLogger']['appenders'])) {
                 foreach ($config['rootLogger']['appenders'] as $appenderName) {
                     $appender = Ideasa_Log4php_LoggerAppenderPool::getAppenderFromPool($appenderName);
                     if ($appender !== null) {
                         $rootLogger->addAppender($appender);
                     }
                 }
             }
         }
     }
     // parse and create loggers
     if (isset($config['loggers'])) {
         foreach ($config['loggers'] as $loggerName => $loggerProperties) {
             if (is_string($loggerName)) {
                 $logger = $hierarchy->getLogger($loggerName);
                 if (isset($loggerProperties['level'])) {
                     $logger->setLevel(Ideasa_Log4php_Helpers_LoggerOptionConverter::toLevel($loggerProperties['level'], Ideasa_Log4php_LoggerLevel::getLevelDebug()));
                     if (isset($loggerProperties['appenders'])) {
                         foreach ($loggerProperties['appenders'] as $appenderName) {
                             $appender = Ideasa_Log4php_LoggerAppenderPool::getAppenderFromPool($appenderName);
                             if ($appender !== null) {
                                 $logger->addAppender($appender);
                             }
                         }
                     }
                 }
             } else {
                 // TODO: throw exception
             }
         }
     }
     return true;
 }