public class ProviderCreatingFactoryBean extends AbstractFactoryBean<<any>>
FactoryBean implementation that
returns a value which is a JSR-330 javax.inject.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.
javax.inject.Provider,
ObjectFactoryCreatingFactoryBean| Modifier and Type | Class and Description |
|---|---|
private static class |
ProviderCreatingFactoryBean.TargetBeanProvider
Independent inner class - for serialization purposes.
|
| Modifier and Type | Field and Description |
|---|---|
private java.lang.String |
targetBeanName |
logger| Constructor and Description |
|---|
ProviderCreatingFactoryBean() |
| Modifier and Type | Method and Description |
|---|---|
void |
afterPropertiesSet()
Eagerly create the singleton instance, if necessary.
|
protected <any> |
createInstance()
Template method that subclasses must override to construct
the object returned by this factory.
|
java.lang.Class<?> |
getObjectType()
This abstract method declaration mirrors the method in the FactoryBean
interface, for a consistent offering of abstract template methods.
|
void |
setTargetBeanName(java.lang.String targetBeanName)
Set the name of the target bean.
|
destroy, destroyInstance, getBeanFactory, getBeanTypeConverter, getEarlySingletonInterfaces, getObject, isSingleton, setBeanClassLoader, setBeanFactory, setSingletonpublic void setTargetBeanName(java.lang.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 java.lang.Exception
AbstractFactoryBeanafterPropertiesSet in interface InitializingBeanafterPropertiesSet in class AbstractFactoryBean<<any>>java.lang.Exception - in the event of misconfiguration (such
as failure to set an essential property) or if initialization fails.public java.lang.Class<?> getObjectType()
AbstractFactoryBeangetObjectType in interface FactoryBean<<any>>getObjectType in class AbstractFactoryBean<<any>>null if not known at the time of the callFactoryBean.getObjectType()protected <any> createInstance()
AbstractFactoryBeanInvoked on initialization of this FactoryBean in case of
a singleton; else, on each AbstractFactoryBean.getObject() call.
createInstance in class AbstractFactoryBean<<any>>AbstractFactoryBean.getObject()