Bean后置处理器 – InstantiationAwareBeanPostProcessor#postProcessProperties

代码片段:

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory#populateBean

boolean hasInstAwareBpps = hasInstantiationAwareBeanPostProcessors();
//深度引用检查, 引用再引用
boolean needsDepCheck = (mbd.getDependencyCheck() != AbstractBeanDefinition.DEPENDENCY_CHECK_NONE);

PropertyDescriptor[] filteredPds = null;
if (hasInstAwareBpps) {
    if (pvs == null) {
        pvs = mbd.getPropertyValues();
    }
    for (BeanPostProcessor bp : getBeanPostProcessors()) {
        if (bp instanceof InstantiationAwareBeanPostProcessor) {
            InstantiationAwareBeanPostProcessor ibp = (InstantiationAwareBeanPostProcessor) bp;
            //这里也是调用的实例化后的后置处理器, 只是调用的方法不一样
　　　　　　　//这里会进行 @Autowired 和 @Resource 的注入工作
            PropertyValues pvsToUse = ibp.postProcessProperties(pvs, bw.getWrappedInstance(), beanName);
            if (pvsToUse == null) {
                if (filteredPds == null) {
                    filteredPds = filterPropertyDescriptorsForDependencyCheck(bw, mbd.allowCaching);
                }
                pvsToUse = ibp.postProcessPropertyValues(pvs, filteredPds, bw.getWrappedInstance(), beanName);
                if (pvsToUse == null) {
                    return;
                }
            }
            pvs = pvsToUse;
        }
    }
}