How to disable Spring autowiring for a certain bean?

Question

There are some class in jar (external library), that uses Spring internally. So library class has structure like a:

Answer 1

Based on @Juan's answer, created a helper to wrap a bean not to be autowired:

public static  FactoryBean preventAutowire(T bean) {
    return new FactoryBean() {
        public T getObject() throws Exception {
            return bean;
        }

        public Class getObjectType() {
            return bean.getClass();
        }

        public boolean isSingleton() {
            return true;
        }
    };
}

...

@Bean
static FactoryBean myBean() {
    return preventAutowire(new MyBean());
}