Check the arguments for all annotated methods at runtime
public class OnlyAScratchForAnPostProcessor {

    @Inject
    private ApplicationContext context;


    @Override
    public Object postProcessAfterInitialization(final Object bean,
        final String beanName) throws BeansException {

          ReflectionUtils.doWithMethods(bean.getClass(), new MethodCallback() {

             @Override
             public void doWith(Method method) throws IllegalArgumentException,
                         IllegalAccessException {

                  String expecedNameFromAnnotation = scanAnnotation(method);
                  if(expecedNameFromAnnotation != null) {
                      if(context.beanByName(expecedNameFromAnnotation) != null) {
                         throw new RuntimeException("illegal configuration");
                      }
                  }
             }

             String scanAnnotation(Method method){...}

          }, ReflectionUtils.USER_DECLARED_METHODS);

    }