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>>
AFactoryBeanimplementation that returns a value which is a JSR-330Providerthat 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@Injectannotation-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
Constructor Summary
Constructors Constructor Description ProviderCreatingFactoryBean()
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidafterPropertiesSet()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.voidsetTargetBeanName(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:AbstractFactoryBeanEagerly create the singleton instance, if necessary.- Specified by:
afterPropertiesSetin interfaceInitializingBean- Overrides:
afterPropertiesSetin 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:AbstractFactoryBeanThis abstract method declaration mirrors the method in the FactoryBean interface, for a consistent offering of abstract template methods.- Specified by:
getObjectTypein interfaceFactoryBean<Provider<Object>>- Specified by:
getObjectTypein classAbstractFactoryBean<Provider<Object>>- Returns:
- the type of object that this FactoryBean creates, or
nullif not known at the time of the call - See Also:
FactoryBean.getObjectType()
createInstance
protected Provider<Object> createInstance()
Description copied from class:AbstractFactoryBeanTemplate 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:
createInstancein classAbstractFactoryBean<Provider<Object>>- Returns:
- the object returned by this factory
- See Also:
AbstractFactoryBean.getObject()