((ConfigurableApplicationContext) getApplicationContext()).getBeanFactory() : null;
List<HandlerMethodArgumentResolver> resolvers = new ArrayList<HandlerMethodArgumentResolver>();
// Annotation-based argument resolution
resolvers.add(new HeaderMethodArgumentResolver(this.conversionService, beanFactory));
resolvers.add(new HeadersMethodArgumentResolver());
resolvers.add(new DestinationVariableMethodArgumentResolver(this.conversionService));
// Type-based argument resolution
resolvers.add(new PrincipalMethodArgumentResolver());