public class ProviderCreatingFactoryBean extends AbstractFactoryBean<Provider<Object>>
FactoryBean implementation that
returns a value which is a JSR-330 Provider that in turn
returns a bean sourced from a BeanFactory.
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 type javax.inject.Provider, as an
alternative to JSR-330's @Inject annotation-driven approach.
Provider,
ObjectFactoryCreatingFactoryBeanlogger| Constructor and Description |
|---|
ProviderCreatingFactoryBean() |
| Modifier and Type | Method and 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.
|
destroy, destroyInstance, getBeanFactory, getBeanTypeConverter, getEarlySingletonInterfaces, getObject, isSingleton, setBeanClassLoader, setBeanFactory, setSingletonpublic void setTargetBeanName(String targetBeanName)
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).
public void afterPropertiesSet()
throws Exception
AbstractFactoryBeanafterPropertiesSet in interface InitializingBeanafterPropertiesSet in class AbstractFactoryBean<Provider<Object>>Exception - in the event of misconfiguration (such as failure to set an
essential property) or if initialization fails for any other reasonpublic Class<?> getObjectType()
AbstractFactoryBeangetObjectType in interface FactoryBean<Provider<Object>>getObjectType in class AbstractFactoryBean<Provider<Object>>null if not known at the time of the callFactoryBean.getObjectType()protected Provider<Object> createInstance()
AbstractFactoryBeanInvoked on initialization of this FactoryBean in case of
a singleton; else, on each AbstractFactoryBean.getObject() call.
createInstance in class AbstractFactoryBean<Provider<Object>>AbstractFactoryBean.getObject()