Spring Framework 6.1.4 · org.springframework.web.context.support.ServletContextAttributeFactoryBean

Modifier and Type	Field and Description
private Object	attribute
private String	attributeName

Access	Constructor and Description
public	ServletContextAttributeFactoryBean()

Method Summary

Modifier and Type	Method and Description
public Object	getObject() Implements org.springframework.beans.factory.FactoryBean.getObject. Return an instance (possibly shared or independent) of the object managed by this factory.
public Class<?>	getObjectType() Implements org.springframework.beans.factory.FactoryBean.getObjectType. Return the type of object that this FactoryBean creates, or `null` if not known in advance.
public boolean	isSingleton() Overrides default org.springframework.beans.factory.FactoryBean.isSingleton. Is the object managed by this factory a singleton?
public void	setAttributeName(String attributeName) Set the name of the ServletContext attribute to expose.
public void	setServletContext(ServletContext the ServletContext object to be used by this object servletContext) Implements org.springframework.web.context.ServletContextAware.setServletContext. Set the `ServletContext` that this object runs in. Invoked after population of normal bean properties but before an init callback like InitializingBean's `afterPropertiesSet` or a custom init-method.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

attribute	back to summary
private Object attribute Annotations @Nullable

attributeName	back to summary
private String attributeName Annotations @Nullable

ServletContextAttributeFactoryBean	back to summary
public ServletContextAttributeFactoryBean()

Method Detail

getObject back to summary

getObject	back to summary
public Object getObject() throws Exception Implements org.springframework.beans.factory.FactoryBean.getObject. Doc from org.springframework.beans.factory.FactoryBean.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. 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. Returns:Object an instance of the bean (can be `null`) Annotations @Override @Nullable Exceptions Exception: in case of creation errors

public Object getObject() throws Exception

Implements org.springframework.beans.factory.FactoryBean.getObject.

Doc from org.springframework.beans.factory.FactoryBean.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. 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.

Returns:Object

an instance of the bean (can be null)

Annotations

@Override
@Nullable

Exceptions

Exception:: in case of creation errors

getObjectType back to summary

getObjectType	back to summary
public Class<?> getObjectType() Implements org.springframework.beans.factory.FactoryBean.getObjectType. Doc from org.springframework.beans.factory.FactoryBean.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. 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. Returns:Class<?> the type of object that this FactoryBean creates, or `null` if not known at the time of the call Annotations @Override

public Class<?> getObjectType()

Implements org.springframework.beans.factory.FactoryBean.getObjectType.

Doc from org.springframework.beans.factory.FactoryBean.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. 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.

Returns:Class<?>

the type of object that this FactoryBean creates, or null if not known at the time of the call

Annotations

@Override

isSingleton back to summary

isSingleton	back to summary
public boolean isSingleton() Overrides default org.springframework.beans.factory.FactoryBean.isSingleton. Doc from org.springframework.beans.factory.FactoryBean.isSingleton. Is the object managed by this factory a singleton? That is, will `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`. The default implementation returns `true`, since a `FactoryBean` typically manages a singleton instance. Returns:boolean whether the exposed object is a singleton Annotations @Override

public boolean isSingleton()

Overrides default org.springframework.beans.factory.FactoryBean.isSingleton.

Doc from org.springframework.beans.factory.FactoryBean.isSingleton.

Is the object managed by this factory a singleton? That is, will 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.

The default implementation returns true, since a FactoryBean typically manages a singleton instance.

Returns:boolean

whether the exposed object is a singleton

Annotations

@Override

setAttributeName	back to summary
public void setAttributeName(String attributeName) Set the name of the ServletContext attribute to expose.

setServletContext back to summary

setServletContext	back to summary
public void setServletContext(ServletContext servletContext) Implements org.springframework.web.context.ServletContextAware.setServletContext. Doc from org.springframework.web.context.ServletContextAware.setServletContext. Set the `ServletContext` that this object runs in. Invoked after population of normal bean properties but before an init callback like InitializingBean's `afterPropertiesSet` or a custom init-method. Invoked after ApplicationContextAware's `setApplicationContext`. Parameters servletContext:ServletContext the ServletContext object to be used by this object Annotations @Override

public void setServletContext(ServletContext servletContext)

Implements org.springframework.web.context.ServletContextAware.setServletContext.

Doc from org.springframework.web.context.ServletContextAware.setServletContext.

Set the ServletContext that this object runs in.

Invoked after population of normal bean properties but before an init callback like InitializingBean's afterPropertiesSet or a custom init-method. Invoked after ApplicationContextAware's setApplicationContext.

Parameters

servletContext:ServletContext: the ServletContext object to be used by this object

Annotations

@Override

public Class ServletContextAttributeFactoryBean

Field Summary

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Field Detail

Constructor Detail

Method Detail