关于AbstractBeanFactory类的实现问题

[chnzhero]

根据name获得bean的那个方法，第21行是不是应该return beanDefinition.getBean();
源代码这样的：
@OverRide
public Object getBean(String name) throws Exception {
BeanDefinition beanDefinition = beanDefinitionMap.get(name);
if(beanDefinition == null) {
throw new RuntimeException("Unable to find the bean of this name, please check!");
}
if(!beanDefinition.isSingleton() || beanDefinition.getBean() == null) {
return doCreateBean(beanDefinition);
} else {
return doCreateBean(beanDefinition);
}
}