| org.springframework.beans.factory.FactoryBean
All known Subclasses: org.springframework.transaction.jta.WebSphereTransactionManagerFactoryBean, org.springframework.remoting.caucho.BurlapProxyFactoryBean, org.springframework.jmx.support.MBeanServerConnectionFactoryBean, org.springframework.jmx.access.MBeanProxyFactoryBean, org.springframework.scheduling.commonj.TimerManagerFactoryBean, org.springframework.beans.factory.config.MethodInvokingFactoryBean, org.springframework.orm.jpa.AbstractEntityManagerFactoryBean, org.springframework.aop.framework.ProxyFactoryBean, org.springframework.transaction.jta.JotmFactoryBean, org.springframework.orm.jdo.LocalPersistenceManagerFactoryBean, org.springframework.scheduling.quartz.SchedulerFactoryBean, org.springframework.aop.framework.AbstractSingletonProxyFactoryBean, org.springframework.orm.jpa.support.SharedEntityManagerBean, org.springframework.jca.support.ResourceAdapterFactoryBean, org.springframework.jms.remoting.JmsInvokerProxyFactoryBean, org.springframework.orm.hibernate3.FilterDefinitionFactoryBean, org.springframework.ejb.access.SimpleRemoteStatelessSessionProxyFactoryBean, org.springframework.cache.ehcache.EhCacheFactoryBean, org.springframework.jmx.support.WebSphereMBeanServerFactoryBean, org.springframework.remoting.rmi.RmiRegistryFactoryBean, org.springframework.jmx.support.ConnectorServerFactoryBean, org.springframework.remoting.jaxrpc.LocalJaxRpcServiceFactoryBean, org.springframework.scheduling.timer.TimerFactoryBean, org.springframework.aop.config.MethodLocatingFactoryBean, org.springframework.jca.support.LocalConnectionFactoryBean, org.springframework.scheduling.backportconcurrent.ScheduledExecutorFactoryBean, org.springframework.jmx.support.WebLogicJndiMBeanServerFactoryBean, org.springframework.remoting.rmi.RmiProxyFactoryBean, org.springframework.orm.hibernate3.AbstractSessionFactoryBean, org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean, org.springframework.ui.freemarker.FreeMarkerConfigurationFactoryBean, org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean, org.springframework.remoting.jaxrpc.JaxRpcPortProxyFactoryBean, org.springframework.beans.factory.config.PropertyPathFactoryBean, org.springframework.transaction.jta.WebLogicServerTransactionManagerFactoryBean, org.springframework.beans.factory.config.CommonsLogFactoryBean, org.springframework.beans.factory.config.ResourceFactoryBean, org.springframework.scheduling.concurrent.ScheduledExecutorFactoryBean, org.springframework.aop.scope.ScopedProxyFactoryBean, org.springframework.beans.factory.config.AbstractFactoryBean, org.springframework.ui.velocity.VelocityEngineFactoryBean, org.springframework.jndi.JndiObjectFactoryBean, org.springframework.orm.jdo.TransactionAwarePersistenceManagerFactoryProxy, org.springframework.orm.toplink.support.TransactionAwareSessionAdapter, org.springframework.beans.factory.config.FieldRetrievingFactoryBean, org.springframework.web.context.support.ServletContextParameterFactoryBean, org.springframework.scheduling.timer.MethodInvokingTimerTaskFactoryBean, org.springframework.ejb.access.LocalStatelessSessionProxyFactoryBean, org.springframework.orm.ibatis.SqlMapClientFactoryBean, org.springframework.web.context.support.ServletContextAttributeFactoryBean, org.springframework.transaction.interceptor.TransactionProxyFactoryBean, org.springframework.remoting.rmi.JndiRmiProxyFactoryBean, org.springframework.remoting.caucho.HessianProxyFactoryBean, org.springframework.web.context.support.ServletContextFactoryBean, org.springframework.jmx.support.MBeanServerFactoryBean, org.springframework.beans.factory.config.PropertiesFactoryBean, org.springframework.beans.factory.config.ServiceLocatorFactoryBean, org.springframework.jmx.support.WebLogicMBeanServerFactoryBean, org.springframework.orm.hibernate.LocalSessionFactoryBean, org.springframework.cache.ehcache.EhCacheManagerFactoryBean, org.springframework.orm.toplink.LocalSessionFactoryBean,
| Method Summary | |
| Object | getObject()
Return an instance (possibly shared or independent) of the object
managed by this factory.
As with a
BeanFactory , this allows support for both the
Singleton and Prototype design pattern.
If this FactoryBean is not fully initialized yet at the time of
the call (for example because it is involved in a circular reference),
throw a corresponding
FactoryBeanNotInitializedException .
As of Spring 2.0, FactoryBeans are allowed to return null
objects. | | Class | getObjectType()
Return the type of object that this FactoryBean creates,
or null if not known in advance.
This allows one to check for specific types of beans without
instantiating objects, for example on autowiring.
In the case of implementations that are creating a singleton object,
this method should try to avoid singleton creation as far as possible;
it should rather estimate the type in advance.
For prototypes, returning a meaningful type here is advisable too.
This method can be called before this FactoryBean has
been fully initialized. | | boolean | isSingleton()
Is the object managed by this factory a singleton? That is,
will
FactoryBean.getObject() always return the same object
(a reference that can be cached)?
NOTE: If a FactoryBean indicates to hold a singleton object,
the object returned from getObject() might get cached
by the owning BeanFactory. |
| getObject | | Object getObject() throws Exception(Code) | | Return an instance (possibly shared or independent) of the object
managed by this factory.
As with a
BeanFactory , this allows support for both the
Singleton and Prototype design pattern.
If this FactoryBean is not fully initialized yet at the time of
the call (for example because it is involved in a circular reference),
throw a corresponding
FactoryBeanNotInitializedException .
As of Spring 2.0, FactoryBeans are allowed to return null
objects. The factory will consider this as normal value to be used; it
will not throw a FactoryBeanNotInitializedException in this case anymore.
FactoryBean implementations are encouraged to throw
FactoryBeanNotInitializedException themselves now, as appropriate.
an instance of the bean (can be null)
throws:
Exception - in case of creation errors
See Also: FactoryBeanNotInitializedException |
| getObjectType | | Class getObjectType()(Code) | | Return the type of object that this FactoryBean creates,
or null if not known in advance.
This allows one to check for specific types of beans without
instantiating objects, for example on autowiring.
In the case of implementations that are creating a singleton object,
this method should try to avoid singleton creation as far as possible;
it should rather estimate the type in advance.
For prototypes, returning a meaningful type here is advisable too.
This method can be called before this FactoryBean has
been fully initialized. It must not rely on state created during
initialization; of course, it can still use such state if available.
NOTE: Autowiring will simply ignore FactoryBeans that return
null here. Therefore it is highly recommended to implement
this method properly, using the current state of the FactoryBean.
the type of object that this FactoryBean creates,or null if not known at the time of the call
See Also: ListableBeanFactory.getBeansOfType |
| isSingleton | | boolean isSingleton()(Code) | | Is the object managed by this factory a singleton? That is,
will
FactoryBean.getObject() always return the same object
(a reference that can be cached)?
NOTE: If a FactoryBean indicates to hold a singleton object,
the object returned from getObject() might get cached
by the owning BeanFactory. Hence, do not return true
unless the FactoryBean always exposes the same reference.
The singleton status of the FactoryBean itself will generally
be provided by the owning BeanFactory; usually, it has to be
defined as singleton there.
NOTE: This method returning false does not
necessarily indicate that returned objects are independent instances.
An implementation of the extended
SmartFactoryBean interface
may explicitly indicate independent instances through its
SmartFactoryBean.isPrototype method. Plain
FactoryBean implementations which do not implement this extended interface are
simply assumed to always return independent instances if the
isSingleton() implementation returns false.
if the exposed object is a singleton
See Also: FactoryBean.getObject()
See Also: SmartFactoryBean.isPrototype |
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