@Override protected Class<?> predictBeanType(String beanName, RootBeanDefinition mbd, Class<?>... typesToMatch) { Class<?> targetType = mbd.getTargetType(); if (targetType == null) { targetType = (mbd.getFactoryMethodName() != null ? getTypeForFactoryMethod(beanName, mbd, typesToMatch) : resolveBeanClass(mbd, beanName, typesToMatch)); if (ObjectUtils.isEmpty(typesToMatch) || getTempClassLoader() == null) { mbd.setTargetType(targetType); } } // Apply SmartInstantiationAwareBeanPostProcessors to predict the // eventual type after a before-instantiation shortcut. if (targetType != null && !mbd.isSynthetic() && hasInstantiationAwareBeanPostProcessors()) { for (BeanPostProcessor bp : getBeanPostProcessors()) { if (bp instanceof SmartInstantiationAwareBeanPostProcessor) { SmartInstantiationAwareBeanPostProcessor ibp = (SmartInstantiationAwareBeanPostProcessor) bp; Class<?> predicted = ibp.predictBeanType(targetType, beanName); if (predicted != null && (typesToMatch.length != 1 || !FactoryBean.class.equals(typesToMatch[0]) || FactoryBean.class.isAssignableFrom(predicted))) { return predicted; } } } } return targetType; }
/** * Obtain a reference for early access to the specified bean, * typically for the purpose of resolving a circular reference. * @param beanName the name of the bean (for error handling purposes) * @param mbd the merged bean definition for the bean * @param bean the raw bean instance * @return the object to expose as bean reference */ protected Object getEarlyBeanReference(String beanName, RootBeanDefinition mbd, Object bean) { Object exposedObject = bean; if (bean != null && !mbd.isSynthetic() && hasInstantiationAwareBeanPostProcessors()) { for (BeanPostProcessor bp : getBeanPostProcessors()) { if (bp instanceof SmartInstantiationAwareBeanPostProcessor) { SmartInstantiationAwareBeanPostProcessor ibp = (SmartInstantiationAwareBeanPostProcessor) bp; exposedObject = ibp.getEarlyBeanReference(exposedObject, beanName); if (exposedObject == null) { return exposedObject; } } } } return exposedObject; }
/** * Determine candidate constructors to use for the given bean, checking all registered * {@link SmartInstantiationAwareBeanPostProcessor SmartInstantiationAwareBeanPostProcessors}. * @param beanClass the raw class of the bean * @param beanName the name of the bean * @return the candidate constructors, or {@code null} if none specified * @throws org.springframework.beans.BeansException in case of errors * @see org.springframework.beans.factory.config.SmartInstantiationAwareBeanPostProcessor#determineCandidateConstructors */ protected Constructor<?>[] determineConstructorsFromBeanPostProcessors(Class<?> beanClass, String beanName) throws BeansException { if (beanClass != null && hasInstantiationAwareBeanPostProcessors()) { for (BeanPostProcessor bp : getBeanPostProcessors()) { if (bp instanceof SmartInstantiationAwareBeanPostProcessor) { SmartInstantiationAwareBeanPostProcessor ibp = (SmartInstantiationAwareBeanPostProcessor) bp; Constructor<?>[] ctors = ibp.determineCandidateConstructors(beanClass, beanName); if (ctors != null) { return ctors; } } } } return null; }
@Override protected Class<?> predictBeanType(String beanName, RootBeanDefinition mbd, Class<?>... typesToMatch) { Class<?> targetType = determineTargetType(beanName, mbd, typesToMatch); // Apply SmartInstantiationAwareBeanPostProcessors to predict the // eventual type after a before-instantiation shortcut. if (targetType != null && !mbd.isSynthetic() && hasInstantiationAwareBeanPostProcessors()) { for (BeanPostProcessor bp : getBeanPostProcessors()) { if (bp instanceof SmartInstantiationAwareBeanPostProcessor) { SmartInstantiationAwareBeanPostProcessor ibp = (SmartInstantiationAwareBeanPostProcessor) bp; Class<?> predicted = ibp.predictBeanType(targetType, beanName); if (predicted != null && (typesToMatch.length != 1 || FactoryBean.class != typesToMatch[0] || FactoryBean.class.isAssignableFrom(predicted))) { return predicted; } } } } return targetType; }