Package org.springframework.beans.factory.config

Interface SmartInstantiationAwareBeanPostProcessor

All Superinterfaces:
BeanPostProcessor, InstantiationAwareBeanPostProcessor
All Known Implementing Classes:
AbstractAdvisingBeanPostProcessor, AbstractAdvisorAutoProxyCreator, AbstractAutoProxyCreator, AbstractBeanFactoryAwareAdvisingPostProcessor, AnnotationAwareAspectJAutoProxyCreator, AspectJAwareAdvisorAutoProxyCreator, AsyncAnnotationBeanPostProcessor, AutowiredAnnotationBeanPostProcessor, BeanNameAutoProxyCreator, DefaultAdvisorAutoProxyCreator, InfrastructureAdvisorAutoProxyCreator, MethodValidationPostProcessor, PersistenceExceptionTranslationPostProcessor, ScriptFactoryPostProcessor
public interface SmartInstantiationAwareBeanPostProcessor extends InstantiationAwareBeanPostProcessor
Extension of the InstantiationAwareBeanPostProcessor interface, adding a callback for predicting the eventual type of a processed bean.

NOTE: This interface is a special purpose interface, mainly for internal use within the framework. In general, application-provided post-processors should simply implement the plain BeanPostProcessor interface.

Since:
2.0.3
Author:
Juergen Hoeller

  • Method Details

    • predictBeanType

      @Nullable default Class<?> predictBeanType(Class<?> beanClass, String beanName) throws BeansException
      Predict the type of the bean to be eventually returned from this processor's InstantiationAwareBeanPostProcessor.postProcessBeforeInstantiation(java.lang.Class<?>, java.lang.String) callback.

      The default implementation returns null. Specific implementations should try to predict the bean type as far as known/cached already, without extra processing steps.

      Parameters:
      beanClass - the raw class of the bean
      beanName - the name of the bean
      Returns:
      the type of the bean, or null if not predictable
      Throws:
      BeansException - in case of errors

    • determineBeanType

      default Class<?> determineBeanType(Class<?> beanClass, String beanName) throws BeansException
      Determine the type of the bean to be eventually returned from this processor's InstantiationAwareBeanPostProcessor.postProcessBeforeInstantiation(java.lang.Class<?>, java.lang.String) callback.

      The default implementation returns the given bean class as-is. Specific implementations should fully evaluate their processing steps in order to create/initialize a potential proxy class upfront.

      Parameters:
      beanClass - the raw class of the bean
      beanName - the name of the bean
      Returns:
      the type of the bean (never null)
      Throws:
      BeansException - in case of errors
      Since:
      6.0

    • determineCandidateConstructors

      @Nullable default Constructor<?>[] determineCandidateConstructors(Class<?> beanClass, String beanName) throws BeansException
      Determine the candidate constructors to use for the given bean.

      The default implementation returns null.

      Parameters:
      beanClass - the raw class of the bean (never null)
      beanName - the name of the bean
      Returns:
      the candidate constructors, or null if none specified
      Throws:
      BeansException - in case of errors

    • getEarlyBeanReference

      default Object getEarlyBeanReference(Object bean, String beanName) throws BeansException
      Obtain a reference for early access to the specified bean, typically for the purpose of resolving a circular reference.

      This callback gives post-processors a chance to expose a wrapper early - that is, before the target bean instance is fully initialized. The exposed object should be equivalent to what BeanPostProcessor.postProcessBeforeInitialization(java.lang.Object, java.lang.String) / BeanPostProcessor.postProcessAfterInitialization(java.lang.Object, java.lang.String) would expose otherwise. Note that the object returned by this method will be used as the bean reference unless the post-processor returns a different wrapper from said post-process callbacks. In other words, those post-process callbacks may either eventually expose the same reference or alternatively return the raw bean instance from those subsequent callbacks (if the wrapper for the affected bean has been built for a call to this method already, it will be exposed as the final bean reference by default).

      The default implementation returns the given bean as-is.

      Parameters:
      bean - the raw bean instance
      beanName - the name of the bean
      Returns:
      the object to expose as the bean reference (typically the passed-in bean instance as default)
      Throws:
      BeansException - in case of errors