接口 InstantiationAwareBeanPostProcessor

方法详细资料

• postProcessBeforeInstantiation

  @Nullable
  default Object postProcessBeforeInstantiation​(Class<?> beanClass,
                                                String beanName)
                                         throws BeansException

  Apply this BeanPostProcessor before the target bean gets instantiated. The returned bean object may be a proxy to use instead of the target bean, effectively suppressing default instantiation of the target bean.

  If a non-null object is returned by this method, the bean creation process will be short-circuited. The only further processing applied is the BeanPostProcessor.postProcessAfterInitialization(java.lang.Object, java.lang.String) callback from the configured BeanPostProcessors.

  This callback will be applied to bean definitions with their bean class, as well as to factory-method definitions in which case the returned bean type will be passed in here.

  Post-processors may implement the extended SmartInstantiationAwareBeanPostProcessor interface in order to predict the type of the bean object that they are going to return here.

  The default implementation returns null.

  参数:

  beanClass - the class of the bean to be instantiated

  beanName - the name of the bean

  返回:

  the bean object to expose instead of a default instance of the target bean, or null to proceed with default instantiation

  抛出:

  BeansException - in case of errors

  另请参阅:

  postProcessAfterInstantiation(java.lang.Object, java.lang.String), AbstractBeanDefinition.getBeanClass(), AbstractBeanDefinition.getFactoryMethodName()

• postProcessAfterInstantiation

  default boolean postProcessAfterInstantiation​(Object bean,
                                                String beanName)
                                         throws BeansException

  Perform operations after the bean has been instantiated, via a constructor or factory method, but before Spring property population (from explicit properties or autowiring) occurs.

  This is the ideal callback for performing custom field injection on the given bean instance, right before Spring's autowiring kicks in.

  The default implementation returns true.

  参数:

  bean - the bean instance created, with properties not having been set yet

  beanName - the name of the bean

  返回:

  true if properties should be set on the bean; false if property population should be skipped. Normal implementations should return true. Returning false will also prevent any subsequent InstantiationAwareBeanPostProcessor instances being invoked on this bean instance.

  抛出:

  BeansException - in case of errors

  另请参阅:

  postProcessBeforeInstantiation(java.lang.Class<?>, java.lang.String)

• postProcessProperties

  @Nullable
  default PropertyValues postProcessProperties​(PropertyValues pvs,
                                               Object bean,
                                               String beanName)
                                        throws BeansException

  Post-process the given property values before the factory applies them to the given bean, without any need for property descriptors.

  Implementations should return null (the default) if they provide a custom postProcessPropertyValues(org.springframework.beans.PropertyValues, java.beans.PropertyDescriptor[], java.lang.Object, java.lang.String) implementation, and pvs otherwise. In a future version of this interface (with postProcessPropertyValues(org.springframework.beans.PropertyValues, java.beans.PropertyDescriptor[], java.lang.Object, java.lang.String) removed), the default implementation will return the given pvs as-is directly.

  参数:

  pvs - the property values that the factory is about to apply (never null)

  bean - the bean instance created, but whose properties have not yet been set

  beanName - the name of the bean

  返回:

  the actual property values to apply to the given bean (can be the passed-in PropertyValues instance), or null which proceeds with the existing properties but specifically continues with a call to postProcessPropertyValues(org.springframework.beans.PropertyValues, java.beans.PropertyDescriptor[], java.lang.Object, java.lang.String) (requiring initialized PropertyDescriptors for the current bean class)

  抛出:

  BeansException - in case of errors

  从以下版本开始:

  5.1

  另请参阅:

  postProcessPropertyValues(org.springframework.beans.PropertyValues, java.beans.PropertyDescriptor[], java.lang.Object, java.lang.String)

• postProcessPropertyValues

  @Deprecated
  @Nullable
  default PropertyValues postProcessPropertyValues​(PropertyValues pvs,
                                                   PropertyDescriptor[] pds,
                                                   Object bean,
                                                   String beanName)
                                            throws BeansException

  已过时。

  as of 5.1, in favor of postProcessProperties(PropertyValues, Object, String)
  Post-process the given property values before the factory applies them to the given bean. Allows for checking whether all dependencies have been satisfied, for example based on a "Required" annotation on bean property setters.

  Also allows for replacing the property values to apply, typically through creating a new MutablePropertyValues instance based on the original PropertyValues, adding or removing specific values.

  The default implementation returns the given pvs as-is.

  参数:

  pvs - the property values that the factory is about to apply (never null)

  pds - the relevant property descriptors for the target bean (with ignored dependency types - which the factory handles specifically - already filtered out)

  bean - the bean instance created, but whose properties have not yet been set

  beanName - the name of the bean

  返回:

  the actual property values to apply to the given bean (can be the passed-in PropertyValues instance), or null to skip property population

  抛出:

  BeansException - in case of errors

  另请参阅:

  postProcessProperties(org.springframework.beans.PropertyValues, java.lang.Object, java.lang.String), MutablePropertyValues