Class ProviderCreatingFactoryBean
- java.lang.Object
- org.springframework.beans.factory.config.AbstractFactoryBean<Provider<Object>>
- org.springframework.beans.factory.config.ProviderCreatingFactoryBean
- All Implemented Interfaces:
Aware
,BeanClassLoaderAware
,BeanFactoryAware
,DisposableBean
,FactoryBean<Provider<Object>>
,InitializingBean
public class ProviderCreatingFactoryBean extends AbstractFactoryBean<Provider<Object>>
AFactoryBean
implementation that returns a value which is a JSR-330Provider
that in turn returns a bean sourced from aBeanFactory
.This is basically a JSR-330 compliant variant of Spring's good old
ObjectFactoryCreatingFactoryBean
. It can be used for traditional external dependency injection configuration that targets a property or constructor argument of typejavax.inject.Provider
, as an alternative to JSR-330's@Inject
annotation-driven approach.- Since:
- 3.0.2
- Author:
- Juergen Hoeller
- See Also:
Provider
,ObjectFactoryCreatingFactoryBean
Field Summary
Fields inherited from class org.springframework.beans.factory.config.AbstractFactoryBean
logger
Fields inherited from interface org.springframework.beans.factory.FactoryBean
OBJECT_TYPE_ATTRIBUTE
Constructor Summary
Constructors Constructor Description ProviderCreatingFactoryBean()
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
afterPropertiesSet()
Eagerly create the singleton instance, if necessary.protected Provider<Object>
createInstance()
Template method that subclasses must override to construct the object returned by this factory.Class<?>
getObjectType()
This abstract method declaration mirrors the method in the FactoryBean interface, for a consistent offering of abstract template methods.void
setTargetBeanName(String targetBeanName)
Set the name of the target bean.Methods inherited from class org.springframework.beans.factory.config.AbstractFactoryBean
destroy, destroyInstance, getBeanFactory, getBeanTypeConverter, getEarlySingletonInterfaces, getObject, isSingleton, setBeanClassLoader, setBeanFactory, setSingleton
Constructor Detail
ProviderCreatingFactoryBean
public ProviderCreatingFactoryBean()
Method Detail
setTargetBeanName
public void setTargetBeanName(String targetBeanName)
Set the name of the target bean.The target does not have to be a non-singleton bean, but realistically always will be (because if the target bean were a singleton, then said singleton bean could simply be injected straight into the dependent object, thus obviating the need for the extra level of indirection afforded by this factory approach).
afterPropertiesSet
public void afterPropertiesSet() throws Exception
Description copied from class:AbstractFactoryBean
Eagerly create the singleton instance, if necessary.- Specified by:
afterPropertiesSet
in interfaceInitializingBean
- Overrides:
afterPropertiesSet
in classAbstractFactoryBean<Provider<Object>>
- Throws:
Exception
- in the event of misconfiguration (such as failure to set an essential property) or if initialization fails for any other reason
getObjectType
public Class<?> getObjectType()
Description copied from class:AbstractFactoryBean
This abstract method declaration mirrors the method in the FactoryBean interface, for a consistent offering of abstract template methods.- Specified by:
getObjectType
in interfaceFactoryBean<Provider<Object>>
- Specified by:
getObjectType
in classAbstractFactoryBean<Provider<Object>>
- Returns:
- the type of object that this FactoryBean creates, or
null
if not known at the time of the call - See Also:
FactoryBean.getObjectType()
createInstance
protected Provider<Object> createInstance()
Description copied from class:AbstractFactoryBean
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
AbstractFactoryBean.getObject()
call.- Specified by:
createInstance
in classAbstractFactoryBean<Provider<Object>>
- Returns:
- the object returned by this factory
- See Also:
AbstractFactoryBean.getObject()