public function setDefaultRenderer($renderingClass) {
		// Check the class exists
		if (!class_exists($renderingClass)) {
			trigger_error("log4php: Failed setting default renderer. Rendering class [$renderingClass] not found.");
			return;
		}
		
		// Create the instance
		$renderer = new $renderingClass();
		
		// Check the class implements the right interface
		if (!($renderer instanceof LoggerRenderer)) {
			trigger_error("log4php: Failed setting default renderer. Rendering class [$renderingClass] does not implement the LoggerRenderer interface.");
			return;
		}
		
		$this->defaultRenderer = $renderer;
	}