Spring Boot如何处理@Resource示例分析

public class TransactionServiceTest {
    @Resource
    private IQrcodeAdScheduleService qrcodeAdScheduleService;
}

protected void applyMergedBeanDefinitionPostProcessors(RootBeanDefinition mbd, Class<?> beanType, String beanName) {
        for (BeanPostProcessor bp : getBeanPostProcessors()) {
            if (bp instanceof MergedBeanDefinitionPostProcessor) {
                MergedBeanDefinitionPostProcessor bdp = (MergedBeanDefinitionPostProcessor) bp;
                //执行CommonAnnotationBeanPostProcessor类postProcessMergedBeanDefinition()
                bdp.postProcessMergedBeanDefinition(mbd, beanType, beanName);
            }
        }
    }

private InjectionMetadata buildResourceMetadata(final Class<?> clazz) {
        LinkedList<InjectionMetadata.InjectedElement> elements = new LinkedList<>();
        Class<?> targetClass = clazz;
        do {
            final LinkedList<InjectionMetadata.InjectedElement> currElements =
                    new LinkedList<>();
            ReflectionUtils.doWithLocalFields(targetClass, field -> {
                if (webServiceRefClass != null && field.isAnnotationPresent(webServiceRefClass)) {
                    if (Modifier.isStatic(field.getModifiers())) {
                        throw new IllegalStateException("@WebServiceRef annotation is not supported on static fields");
                    }
                    currElements.add(new WebServiceRefElement(field, field, null));
                }
                else if (ejbRefClass != null && field.isAnnotationPresent(ejbRefClass)) {
                    if (Modifier.isStatic(field.getModifiers())) {
                        throw new IllegalStateException("@EJB annotation is not supported on static fields");
                    }
                    currElements.add(new EjbRefElement(field, field, null));
                }
                //解析@Resource.class
                else if (field.isAnnotationPresent(Resource.class)) {
                    if (Modifier.isStatic(field.getModifiers())) {
                        throw new IllegalStateException("@Resource annotation is not supported on static fields");
                    }
                    if (!ignoredResourceTypes.contains(field.getType().getName())) {
                        currElements.add(new ResourceElement(field, field, null));
                    }
                }
            });
}