bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalResourceInjectionBean.class));
TestBean tb = new TestBean();
bf.registerSingleton("testBean", tb);
IndexedTestBean itb = new IndexedTestBean();
bf.registerSingleton("indexedTestBean", itb);
NestedTestBean ntb1 = new NestedTestBean();
bf.registerSingleton("nestedTestBean1", ntb1);
NestedTestBean ntb2 = new NestedTestBean();
bf.registerSingleton("nestedTestBean2", ntb2);
OptionalResourceInjectionBean bean = (OptionalResourceInjectionBean) bf.getBean("annotatedBean");
assertSame(tb, bean.getTestBean());
assertSame(tb, bean.getTestBean2());