org.springframework.beans.factory.config

## Interface AutowireCapableBeanFactory

- All Superinterfaces:
    BeanFactory
  All Known Subinterfaces:
    ConfigurableListableBeanFactory
  All Known Implementing Classes:
    AbstractAutowireCapableBeanFactory, DefaultListableBeanFactory, XmlBeanFactory

      public interface AutowireCapableBeanFactory
      extends BeanFactory

  Extension of the `BeanFactory` interface to be implemented by bean factories that are capable of autowiring, provided that they want to expose this functionality for existing bean instances.

  This subinterface of BeanFactory is not meant to be used in normal application code: stick to `BeanFactory` or `ListableBeanFactory` for typical use cases.

  Integration code for other frameworks can leverage this interface to wire and populate existing bean instances that Spring does not control the lifecycle of. This is particularly useful for WebWork Actions and Tapestry Page objects, for example.

  Note that this interface is not implemented by `ApplicationContext` facades, as it is hardly ever used by application code. That said, it is available from an application context too, accessible through ApplicationContext's `ApplicationContext.getAutowireCapableBeanFactory()` method.

  You may also implement the `BeanFactoryAware` interface, which exposes the internal BeanFactory even when running in an ApplicationContext, to get access to an AutowireCapableBeanFactory: simply cast the passed-in BeanFactory to AutowireCapableBeanFactory.

  Since:
    04.12.2003
  Author:
    Juergen Hoeller
  See Also:
    `BeanFactoryAware`, `ConfigurableListableBeanFactory`, `ApplicationContext.getAutowireCapableBeanFactory()`

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `AUTOWIRE_AUTODETECT` Deprecated. as of Spring 3.0: If you are using mixed autowiring strategies, prefer annotation-based autowiring for clearer demarcation of autowiring needs.
    `static int` | `AUTOWIRE_BY_NAME` Constant that indicates autowiring bean properties by name (applying to all bean property setters).
    `static int` | `AUTOWIRE_BY_TYPE` Constant that indicates autowiring bean properties by type (applying to all bean property setters).
    `static int` | `AUTOWIRE_CONSTRUCTOR` Constant that indicates autowiring the greediest constructor that can be satisfied (involves resolving the appropriate constructor).
    `static int` | `AUTOWIRE_NO` Constant that indicates no externally defined autowiring.

    - ### Fields inherited from interface org.springframework.beans.factory.BeanFactory

      `FACTORY_BEAN_PREFIX`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Object` | `applyBeanPostProcessorsAfterInitialization(Object existingBean, String beanName)` Apply `BeanPostProcessors` to the given existing bean instance, invoking their `postProcessAfterInitialization` methods.
    `Object` | `applyBeanPostProcessorsBeforeInitialization(Object existingBean, String beanName)` Apply `BeanPostProcessors` to the given existing bean instance, invoking their `postProcessBeforeInitialization` methods.
    `void` | `applyBeanPropertyValues(Object existingBean, String beanName)` Apply the property values of the bean definition with the given name to the given bean instance.
    `Object` | `autowire(Class beanClass, int autowireMode, boolean dependencyCheck)` Instantiate a new bean instance of the given class with the specified autowire strategy.
    `void` | `autowireBean(Object existingBean)` Populate the given bean instance through applying after-instantiation callbacks and bean property post-processing (e.g.
    `void` | `autowireBeanProperties(Object existingBean, int autowireMode, boolean dependencyCheck)` Autowire the bean properties of the given bean instance by name or type.
    `Object` | `configureBean(Object existingBean, String beanName)` Configure the given raw bean: autowiring bean properties, applying bean property values, applying factory callbacks such as `setBeanName` and `setBeanFactory`, and also applying all bean post processors (including ones which might wrap the given raw bean).
    `<T> T` | `createBean(Class<T> beanClass)` Fully create a new bean instance of the given class.
    `Object` | `createBean(Class beanClass, int autowireMode, boolean dependencyCheck)` Fully create a new bean instance of the given class with the specified autowire strategy.
    `Object` | `initializeBean(Object existingBean, String beanName)` Initialize the given raw bean, applying factory callbacks such as `setBeanName` and `setBeanFactory`, also applying all bean post processors (including ones which might wrap the given raw bean).
    `Object` | `resolveDependency(DependencyDescriptor descriptor, String beanName)` Resolve the specified dependency against the beans defined in this factory.
    `Object` | `resolveDependency(DependencyDescriptor descriptor, String beanName, Set<String> autowiredBeanNames, TypeConverter typeConverter)` Resolve the specified dependency against the beans defined in this factory.

    - ### Methods inherited from interface org.springframework.beans.factory.BeanFactory

      `containsBean, getAliases, getBean, getBean, getBean, getBean, getType, isPrototype, isSingleton, isTypeMatch`

- - ### Field Detail

    - #### AUTOWIRE_NO

          static final int AUTOWIRE_NO

      Constant that indicates no externally defined autowiring. Note that BeanFactoryAware etc and annotation-driven injection will still be applied.
      See Also:
        `createBean(java.lang.Class<T>)`, `autowire(java.lang.Class, int, boolean)`, `autowireBeanProperties(java.lang.Object, int, boolean)`, Constant Field Values

    - #### AUTOWIRE_BY_NAME

          static final int AUTOWIRE_BY_NAME

      Constant that indicates autowiring bean properties by name (applying to all bean property setters).
      See Also:
        `createBean(java.lang.Class<T>)`, `autowire(java.lang.Class, int, boolean)`, `autowireBeanProperties(java.lang.Object, int, boolean)`, Constant Field Values

    - #### AUTOWIRE_BY_TYPE

          static final int AUTOWIRE_BY_TYPE

      Constant that indicates autowiring bean properties by type (applying to all bean property setters).
      See Also:
        `createBean(java.lang.Class<T>)`, `autowire(java.lang.Class, int, boolean)`, `autowireBeanProperties(java.lang.Object, int, boolean)`, Constant Field Values

    - #### AUTOWIRE_CONSTRUCTOR

          static final int AUTOWIRE_CONSTRUCTOR

      Constant that indicates autowiring the greediest constructor that can be satisfied (involves resolving the appropriate constructor).
      See Also:
        `createBean(java.lang.Class<T>)`, `autowire(java.lang.Class, int, boolean)`, Constant Field Values

    - #### AUTOWIRE_AUTODETECT

          @Deprecated
          static final int AUTOWIRE_AUTODETECT

      Deprecated. as of Spring 3.0: If you are using mixed autowiring strategies, prefer annotation-based autowiring for clearer demarcation of autowiring needs.
      Constant that indicates determining an appropriate autowire strategy through introspection of the bean class.
      See Also:
        `createBean(java.lang.Class<T>)`, `autowire(java.lang.Class, int, boolean)`, Constant Field Values

  - ### Method Detail

    - #### createBean

          <T> T createBean(Class<T> beanClass)
                       throws BeansException

      Fully create a new bean instance of the given class.

      Performs full initialization of the bean, including all applicable `BeanPostProcessors`.

      Note: This is intended for creating a fresh instance, populating annotated fields and methods as well as applying all standard bean initialiation callbacks. It does not imply traditional by-name or by-type autowiring of properties; use `createBean(Class, int, boolean)` for that purposes.

      Parameters:
        `beanClass` - the class of the bean to create
      Returns:
        the new bean instance
      Throws:
        `BeansException` - if instantiation or wiring failed

    - #### autowireBean

          void autowireBean(Object existingBean)
                            throws BeansException

      Populate the given bean instance through applying after-instantiation callbacks and bean property post-processing (e.g. for annotation-driven injection).

      Note: This is essentially intended for (re-)populating annotated fields and methods, either for new instances or for deserialized instances. It does not imply traditional by-name or by-type autowiring of properties; use `autowireBeanProperties(java.lang.Object, int, boolean)` for that purposes.

      Parameters:
        `existingBean` - the existing bean instance
      Throws:
        `BeansException` - if wiring failed

    - #### configureBean

          Object configureBean(Object existingBean,
                             String beanName)
                               throws BeansException

      Configure the given raw bean: autowiring bean properties, applying bean property values, applying factory callbacks such as `setBeanName` and `setBeanFactory`, and also applying all bean post processors (including ones which might wrap the given raw bean).

      This is effectively a superset of what `initializeBean(java.lang.Object, java.lang.String)` provides, fully applying the configuration specified by the corresponding bean definition. Note: This method requires a bean definition for the given name!

      Parameters:
        `existingBean` - the existing bean instance
        `beanName` - the name of the bean, to be passed to it if necessary (a bean definition of that name has to be available)
      Returns:
        the bean instance to use, either the original or a wrapped one
      Throws:
        `NoSuchBeanDefinitionException` - if there is no bean definition with the given name
        `BeansException` - if the initialization failed
      See Also:
        `initializeBean(java.lang.Object, java.lang.String)`

    - #### resolveDependency

          Object resolveDependency(DependencyDescriptor descriptor,
                                 String beanName)
                                   throws BeansException

      Resolve the specified dependency against the beans defined in this factory.
      Parameters:
        `descriptor` - the descriptor for the dependency
        `beanName` - the name of the bean which declares the present dependency
      Returns:
        the resolved object, or `null` if none found
      Throws:
        `BeansException` - in dependency resolution failed

    - #### createBean

          Object createBean(Class beanClass,
                          int autowireMode,
                          boolean dependencyCheck)
                            throws BeansException

      Fully create a new bean instance of the given class with the specified autowire strategy. All constants defined in this interface are supported here.

      Performs full initialization of the bean, including all applicable `BeanPostProcessors`. This is effectively a superset of what `autowire(java.lang.Class, int, boolean)` provides, adding `initializeBean(java.lang.Object, java.lang.String)` behavior.

      Parameters:
        `beanClass` - the class of the bean to create
        `autowireMode` - by name or type, using the constants in this interface
        `dependencyCheck` - whether to perform a dependency check for objects (not applicable to autowiring a constructor, thus ignored there)
      Returns:
        the new bean instance
      Throws:
        `BeansException` - if instantiation or wiring failed
      See Also:
        `AUTOWIRE_NO`, `AUTOWIRE_BY_NAME`, `AUTOWIRE_BY_TYPE`, `AUTOWIRE_CONSTRUCTOR`

    - #### autowire

          Object autowire(Class beanClass,
                        int autowireMode,
                        boolean dependencyCheck)
                          throws BeansException

      Instantiate a new bean instance of the given class with the specified autowire strategy. All constants defined in this interface are supported here. Can also be invoked with `AUTOWIRE_NO` in order to just apply before-instantiation callbacks (e.g. for annotation-driven injection).

      Does not apply standard `BeanPostProcessors` callbacks or perform any further initialization of the bean. This interface offers distinct, fine-grained operations for those purposes, for example `initializeBean(java.lang.Object, java.lang.String)`. However, `InstantiationAwareBeanPostProcessor` callbacks are applied, if applicable to the construction of the instance.

      Parameters:
        `beanClass` - the class of the bean to instantiate
        `autowireMode` - by name or type, using the constants in this interface
        `dependencyCheck` - whether to perform a dependency check for object references in the bean instance (not applicable to autowiring a constructor, thus ignored there)
      Returns:
        the new bean instance
      Throws:
        `BeansException` - if instantiation or wiring failed
      See Also:
        `AUTOWIRE_NO`, `AUTOWIRE_BY_NAME`, `AUTOWIRE_BY_TYPE`, `AUTOWIRE_CONSTRUCTOR`, `AUTOWIRE_AUTODETECT`, `initializeBean(java.lang.Object, java.lang.String)`, `applyBeanPostProcessorsBeforeInitialization(java.lang.Object, java.lang.String)`, `applyBeanPostProcessorsAfterInitialization(java.lang.Object, java.lang.String)`

    - #### autowireBeanProperties

          void autowireBeanProperties(Object existingBean,
                                    int autowireMode,
                                    boolean dependencyCheck)
                                      throws BeansException

      Autowire the bean properties of the given bean instance by name or type. Can also be invoked with `AUTOWIRE_NO` in order to just apply after-instantiation callbacks (e.g. for annotation-driven injection).

      Does not apply standard `BeanPostProcessors` callbacks or perform any further initialization of the bean. This interface offers distinct, fine-grained operations for those purposes, for example `initializeBean(java.lang.Object, java.lang.String)`. However, `InstantiationAwareBeanPostProcessor` callbacks are applied, if applicable to the configuration of the instance.

      Parameters:
        `existingBean` - the existing bean instance
        `autowireMode` - by name or type, using the constants in this interface
        `dependencyCheck` - whether to perform a dependency check for object references in the bean instance
      Throws:
        `BeansException` - if wiring failed
      See Also:
        `AUTOWIRE_BY_NAME`, `AUTOWIRE_BY_TYPE`, `AUTOWIRE_NO`

    - #### applyBeanPropertyValues

          void applyBeanPropertyValues(Object existingBean,
                                     String beanName)
                                       throws BeansException

      Apply the property values of the bean definition with the given name to the given bean instance. The bean definition can either define a fully self-contained bean, reusing its property values, or just property values meant to be used for existing bean instances.

      This method does not autowire bean properties; it just applies explicitly defined property values. Use the `autowireBeanProperties(java.lang.Object, int, boolean)` method to autowire an existing bean instance. Note: This method requires a bean definition for the given name!

      Does not apply standard `BeanPostProcessors` callbacks or perform any further initialization of the bean. This interface offers distinct, fine-grained operations for those purposes, for example `initializeBean(java.lang.Object, java.lang.String)`. However, `InstantiationAwareBeanPostProcessor` callbacks are applied, if applicable to the configuration of the instance.

      Parameters:
        `existingBean` - the existing bean instance
        `beanName` - the name of the bean definition in the bean factory (a bean definition of that name has to be available)
      Throws:
        `NoSuchBeanDefinitionException` - if there is no bean definition with the given name
        `BeansException` - if applying the property values failed
      See Also:
        `autowireBeanProperties(java.lang.Object, int, boolean)`

    - #### initializeBean

          Object initializeBean(Object existingBean,
                              String beanName)
                                throws BeansException

      Initialize the given raw bean, applying factory callbacks such as `setBeanName` and `setBeanFactory`, also applying all bean post processors (including ones which might wrap the given raw bean).

      Note that no bean definition of the given name has to exist in the bean factory. The passed-in bean name will simply be used for callbacks but not checked against the registered bean definitions.

      Parameters:
        `existingBean` - the existing bean instance
        `beanName` - the name of the bean, to be passed to it if necessary (only passed to `BeanPostProcessors`)
      Returns:
        the bean instance to use, either the original or a wrapped one
      Throws:
        `BeansException` - if the initialization failed

    - #### applyBeanPostProcessorsBeforeInitialization

          Object applyBeanPostProcessorsBeforeInitialization(Object existingBean,
                                                           String beanName)
                                                             throws BeansException

      Apply `BeanPostProcessors` to the given existing bean instance, invoking their `postProcessBeforeInitialization` methods. The returned bean instance may be a wrapper around the original.
      Parameters:
        `existingBean` - the new bean instance
        `beanName` - the name of the bean
      Returns:
        the bean instance to use, either the original or a wrapped one
      Throws:
        `BeansException` - if any post-processing failed
      See Also:
        `BeanPostProcessor.postProcessBeforeInitialization(java.lang.Object, java.lang.String)`

    - #### applyBeanPostProcessorsAfterInitialization

          Object applyBeanPostProcessorsAfterInitialization(Object existingBean,
                                                          String beanName)
                                                            throws BeansException

      Apply `BeanPostProcessors` to the given existing bean instance, invoking their `postProcessAfterInitialization` methods. The returned bean instance may be a wrapper around the original.
      Parameters:
        `existingBean` - the new bean instance
        `beanName` - the name of the bean
      Returns:
        the bean instance to use, either the original or a wrapped one
      Throws:
        `BeansException` - if any post-processing failed
      See Also:
        `BeanPostProcessor.postProcessAfterInitialization(java.lang.Object, java.lang.String)`

    - #### resolveDependency

          Object resolveDependency(DependencyDescriptor descriptor,
                                 String beanName,
                                 Set<String> autowiredBeanNames,
                                 TypeConverter typeConverter)
                                   throws BeansException

      Resolve the specified dependency against the beans defined in this factory.
      Parameters:
        `descriptor` - the descriptor for the dependency
        `beanName` - the name of the bean which declares the present dependency
        `autowiredBeanNames` - a Set that all names of autowired beans (used for resolving the present dependency) are supposed to be added to
        `typeConverter` - the TypeConverter to use for populating arrays and collections
      Returns:
        the resolved object, or `null` if none found
      Throws:
        `BeansException` - in dependency resolution failed