HandlerMethodService.java 文件源码

public HandlerMethodService(ConversionService conversionService,
        List<HandlerMethodArgumentResolver> customArgumentResolvers,
        ObjectMapper objectMapper, ApplicationContext applicationContext) {
    this.conversionService = conversionService;
    this.parameterNameDiscoverer = new DefaultParameterNameDiscoverer();

    this.argumentResolvers = new HandlerMethodArgumentResolverComposite();

    ConfigurableBeanFactory beanFactory = ClassUtils.isAssignableValue(
            ConfigurableApplicationContext.class, applicationContext)
                    ? ((ConfigurableApplicationContext) applicationContext)
                            .getBeanFactory()
                    : null;

    this.argumentResolvers.addResolver(
            new HeaderMethodArgumentResolver(this.conversionService, beanFactory));
    this.argumentResolvers.addResolver(new HeadersMethodArgumentResolver());
    this.argumentResolvers.addResolver(new WampMessageMethodArgumentResolver());
    this.argumentResolvers.addResolver(new PrincipalMethodArgumentResolver());
    this.argumentResolvers.addResolver(new WampSessionIdMethodArgumentResolver());
    this.argumentResolvers.addResolvers(customArgumentResolvers);

    this.objectMapper = objectMapper;
}