类 AbstractFactoryBean<T>

字段详细资料

• logger

  protected final Log logger

  Logger available to subclasses.

构造器详细资料

• AbstractFactoryBean

  public AbstractFactoryBean()

方法详细资料

• setSingleton

  public void setSingleton​(boolean singleton)

  Set if a singleton should be created, or a new object on each request otherwise. Default is true (a singleton).

• isSingleton

  public boolean isSingleton()

  从接口复制的说明: FactoryBean
  Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?

  NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.

  The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

  NOTE: This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean.isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.

  The default implementation returns true, since a FactoryBean typically manages a singleton instance.

  指定者:

  isSingleton 在接口中 FactoryBean<T>

  返回:

  whether the exposed object is a singleton

  另请参阅:

  FactoryBean.getObject(), SmartFactoryBean.isPrototype()

• setBeanClassLoader

  public void setBeanClassLoader​(ClassLoader classLoader)

  从接口复制的说明: BeanClassLoaderAware
  Callback that supplies the bean class loader to a bean instance.

  Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean'sInitializingBean.afterPropertiesSet() method or a custom init-method.

  指定者:

  setBeanClassLoader 在接口中 BeanClassLoaderAware

  参数:

  classLoader - the owning class loader

• setBeanFactory

  public void setBeanFactory​(@Nullable
                             BeanFactory beanFactory)

  从接口复制的说明: BeanFactoryAware
  Callback that supplies the owning factory to a bean instance.

  Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean.afterPropertiesSet() or a custom init-method.

  指定者:

  setBeanFactory 在接口中 BeanFactoryAware

  参数:

  beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.

  另请参阅:

  BeanInitializationException

• getBeanFactory

  @Nullable
  protected BeanFactory getBeanFactory()

  Return the BeanFactory that this bean runs in.

• getBeanTypeConverter

  protected TypeConverter getBeanTypeConverter()

  Obtain a bean type converter from the BeanFactory that this bean runs in. This is typically a fresh instance for each call, since TypeConverters are usually not thread-safe.

  Falls back to a SimpleTypeConverter when not running in a BeanFactory.

  另请参阅:

  ConfigurableBeanFactory.getTypeConverter(), SimpleTypeConverter

• afterPropertiesSet

  public void afterPropertiesSet()
                          throws Exception

  Eagerly create the singleton instance, if necessary.

  指定者:

  afterPropertiesSet 在接口中 InitializingBean

  抛出:

  Exception - in the event of misconfiguration (such as failure to set an essential property) or if initialization fails for any other reason

• getObject

  public final T getObject()
                    throws Exception

  Expose the singleton instance or create a new prototype instance.

  指定者:

  getObject 在接口中 FactoryBean<T>

  返回:

  an instance of the bean (can be null)

  抛出:

  Exception - in case of creation errors

  另请参阅:

  createInstance(), getEarlySingletonInterfaces()

• destroy

  public void destroy()
               throws Exception

  Destroy the singleton instance, if any.

  指定者:

  destroy 在接口中 DisposableBean

  抛出:

  Exception - in case of shutdown errors. Exceptions will get logged but not rethrown to allow other beans to release their resources as well.

  另请参阅:

  destroyInstance(Object)

• getObjectType

  @Nullable
  public abstract Class<?> getObjectType()

  This abstract method declaration mirrors the method in the FactoryBean interface, for a consistent offering of abstract template methods.

  指定者:

  getObjectType 在接口中 FactoryBean<T>

  返回:

  the type of object that this FactoryBean creates, or null if not known at the time of the call

  另请参阅:

  FactoryBean.getObjectType()

• createInstance

  protected abstract T createInstance()
                               throws Exception

  Template method that subclasses must override to construct the object returned by this factory.

  Invoked on initialization of this FactoryBean in case of a singleton; else, on each getObject() call.

  返回:

  the object returned by this factory

  抛出:

  Exception - if an exception occurred during object creation

  另请参阅:

  getObject()

• getEarlySingletonInterfaces

  @Nullable
  protected Class<?>[] getEarlySingletonInterfaces()

  Return an array of interfaces that a singleton object exposed by this FactoryBean is supposed to implement, for use with an 'early singleton proxy' that will be exposed in case of a circular reference.

  The default implementation returns this FactoryBean's object type, provided that it is an interface, or null otherwise. The latter indicates that early singleton access is not supported by this FactoryBean. This will lead to a FactoryBeanNotInitializedException getting thrown.

  返回:

  the interfaces to use for 'early singletons', or null to indicate a FactoryBeanNotInitializedException

  另请参阅:

  FactoryBeanNotInitializedException

• destroyInstance

  protected void destroyInstance​(@Nullable
                                 T instance)
                          throws Exception

  Callback for destroying a singleton instance. Subclasses may override this to destroy the previously created instance.

  The default implementation is empty.

  参数:

  instance - the singleton instance, as returned by createInstance()

  抛出:

  Exception - in case of shutdown errors

  另请参阅:

  createInstance()