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## org.springframework.beans.factory
Interface SmartFactoryBean

All Superinterfaces:
  FactoryBean

All Known Implementing Classes:
  BeanReferenceFactoryBean

    public interface SmartFactoryBean

extends FactoryBean

Extension of the `FactoryBean` interface. Implementations may indicate whether they always return independent instances, for the case where their `FactoryBean.isSingleton()` implementation returning `false` does not clearly indicate independent instances.

Plain `FactoryBean` implementations which do not implement this extended interface are simply assumed to always return independent instances if their `FactoryBean.isSingleton()` implementation returns `false`; the exposed object is only accessed on demand.

NOTE: This interface is a special purpose interface, mainly for internal use within the framework and within collaborating frameworks. In general, application-provided FactoryBeans should simply implement the plain `FactoryBean` interface. New methods might be added to this extended interface even in point releases.

Since:
  2.0.3
Author:
  Juergen Hoeller
See Also:
  `isPrototype()`, `FactoryBean.isSingleton()`

Method Summary
`boolean` | `isEagerInit()` Does this FactoryBean expect eager initialization, that is, eagerly initialize itself as well as expect eager initialization of its singleton object (if any)?
`boolean` | `isPrototype()` Is the object managed by this factory a prototype?

Methods inherited from interface org.springframework.beans.factory.FactoryBean
`getObject, getObjectType, isSingleton`

Method Detail

### isPrototype

    boolean isPrototype()

  Is the object managed by this factory a prototype? That is, will `FactoryBean.getObject()` always return an independent instance?

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

  This method is supposed to strictly check for independent instances; it should not return `true` for scoped objects or other kinds of non-singleton, non-independent objects. For this reason, this is not simply the inverted form of `FactoryBean.isSingleton()`.

  Returns:
    whether the exposed object is a prototype
  See Also:
    `FactoryBean.getObject()`, `FactoryBean.isSingleton()`

### isEagerInit

    boolean isEagerInit()

  Does this FactoryBean expect eager initialization, that is, eagerly initialize itself as well as expect eager initialization of its singleton object (if any)?

  A standard FactoryBean is not expected to initialize eagerly: Its `FactoryBean.getObject()` will only be called for actual access, even in case of a singleton object. Returning `true` from this method suggests that `FactoryBean.getObject()` should be called eagerly, also applying post-processors eagerly. This may make sense in case of a `singleton` object, in particular if post-processors expect to be applied on startup.

  Returns:
    whether eager initialization applies
  See Also:
    `ConfigurableListableBeanFactory.preInstantiateSingletons()`

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