[FIXED] Spring bean definition - get bean class

Issue

I'm trying the get Bean class name without initialize the bean. I need to know the class , I could get the bean from applicationContext and to check the class name from the bean instance, But I want to know the class with out actually creating/init the bean.. Is it possible ?

 Object bean = applicationContext.getBean("beanName");
 bean.getClass();

Solution

You can't do this after creating the ApplicationContext. Most ApplicationContext implementations will refresh() themselves and force instantiation of the beans.

What you can do is create a BeanFactoryPostProcessor in which you get the target bean definition and check the bean class.

@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
    String className = beanFactory.getBeanDefinition("").getBeanClassName();
}

But note, as the javadoc for getBeanClassName() states

Hence, do not consider this to be the definitive bean type at runtime but rather only use it for parsing purposes at the individual bean definition level.

So use it with a grain of salt.

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If you give us more details as to what you are trying to accomplish, there might be alternatives.

Answered By - Sotirios Delimanolis