org.springframework.beans.factory: public interface: SmartFactoryBean

org.springframework.beans.factory
public interface: SmartFactoryBean [javadoc | source]

All Implemented Interfaces:
FactoryBean

All Known Implementing Classes:
BeanReferenceFactoryBean

Extension of the FactoryBean interface. Implementations may indicate whether they always return independent instances, for the case where their #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 #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.

Also see:

isPrototype()

isSingleton()

author: Juergen - Hoeller

since: 2.0.3 -

Method from org.springframework.beans.factory.SmartFactoryBean Summary:
isEagerInit, isPrototype

Method from org.springframework.beans.factory.SmartFactoryBean Detail:
public 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 #getObject() will only be called for actual access, even in case of a singleton object. Returning `true` from this method suggests that #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.
public boolean isPrototype() Is the object managed by this factory a prototype? That is, will #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 #isSingleton() .

Method from org.springframework.beans.factory.SmartFactoryBean Detail:

 public 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 #getObject()  will only be called for actual access, even
in case of a singleton object. Returning true from this
method suggests that #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.

 public boolean isPrototype()Is the object managed by this factory a prototype? That is,
will #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 #isSingleton() .