Package org.springframework.web.method

Class ControllerAdviceBean

java.lang.Object

org.springframework.web.method.ControllerAdviceBean

All Implemented Interfaces:

Ordered

public class ControllerAdviceBean
extends Object
implements Ordered

Encapsulates information about an @ControllerAdvice Spring-managed bean without necessarily requiring it to be instantiated.

The findAnnotatedBeans(ApplicationContext) method can be used to discover such beans. However, a ControllerAdviceBean may be created from any object, including ones without an @ControllerAdvice annotation.

Since:

3.2

Author:

Rossen Stoyanchev, Brian Clozel, Juergen Hoeller, Sam Brannen

Field Summary

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
ControllerAdviceBean(Object bean)	Create a ControllerAdviceBean using the given bean instance.
ControllerAdviceBean(String beanName, BeanFactory beanFactory)	Create a ControllerAdviceBean using the given bean name and BeanFactory.
ControllerAdviceBean(String beanName, BeanFactory beanFactory, ControllerAdvice controllerAdvice)	Create a ControllerAdviceBean using the given bean name, BeanFactory, and @ControllerAdvice annotation.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)
static List<ControllerAdviceBean>	findAnnotatedBeans(ApplicationContext context)	Find beans annotated with @ControllerAdvice in the given ApplicationContext and wrap them as ControllerAdviceBean instances.
Class<?>	getBeanType()	Return the type of the contained bean.
int	getOrder()	Get the order value for the contained bean.
int	hashCode()
boolean	isApplicableToBeanType(Class<?> beanType)	Check whether the given bean type should be advised by this ControllerAdviceBean.
Object	resolveBean()	Get the bean instance for this ControllerAdviceBean, if necessary resolving the bean name through the BeanFactory.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ControllerAdviceBean

public ControllerAdviceBean(Object bean)

Create a ControllerAdviceBean using the given bean instance.

Parameters:

bean - the bean instance

ControllerAdviceBean

public ControllerAdviceBean(String beanName,
 BeanFactory beanFactory)

Create a ControllerAdviceBean using the given bean name and BeanFactory.

Parameters:

beanName - the name of the bean

beanFactory - a BeanFactory to retrieve the bean type initially and later to resolve the actual bean

ControllerAdviceBean

public ControllerAdviceBean(String beanName,
 BeanFactory beanFactory,
 @Nullable
 ControllerAdvice controllerAdvice)

Create a ControllerAdviceBean using the given bean name, BeanFactory, and @ControllerAdvice annotation.

Parameters:

beanName - the name of the bean

beanFactory - a BeanFactory to retrieve the bean type initially and later to resolve the actual bean

controllerAdvice - the @ControllerAdvice annotation for the bean, or null if not yet retrieved

Since:

5.2

Method Details

getOrder

public int getOrder()

Get the order value for the contained bean.

As of Spring Framework 5.3, the order value is lazily retrieved using the following algorithm and cached. Note, however, that a @ControllerAdvice bean that is configured as a scoped bean — for example, as a request-scoped or session-scoped bean — will not be eagerly resolved. Consequently, Ordered is not honored for scoped @ControllerAdvice beans.

• If the resolved bean implements Ordered, use the value returned by Ordered.getOrder().
• If the factory method is known, use the value returned by OrderUtils.getOrder(AnnotatedElement).
• If the bean type is known, use the value returned by OrderUtils.getOrder(Class, int) with Ordered.LOWEST_PRECEDENCE used as the default order value.
• Otherwise use Ordered.LOWEST_PRECEDENCE as the default, fallback order value.

Specified by:

getOrder in interface Ordered

Returns:

the order value

See Also:

• resolveBean()

getBeanType

@Nullable
public Class<?> getBeanType()

Return the type of the contained bean.

If the bean type is a CGLIB-generated class, the original user-defined class is returned.

resolveBean

public Object resolveBean()

Get the bean instance for this ControllerAdviceBean, if necessary resolving the bean name through the BeanFactory.

Once the bean instance has been resolved it will be cached if it is a singleton, thereby avoiding repeated lookups in the BeanFactory.

isApplicableToBeanType

public boolean isApplicableToBeanType(@Nullable
 Class<?> beanType)

Check whether the given bean type should be advised by this ControllerAdviceBean.

Parameters:

beanType - the type of the bean to check

Since:

4.0

See Also:

• ControllerAdvice

equals

public boolean equals(@Nullable
 Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

findAnnotatedBeans

public static List<ControllerAdviceBean> findAnnotatedBeans(ApplicationContext context)

Find beans annotated with @ControllerAdvice in the given ApplicationContext and wrap them as ControllerAdviceBean instances.

Note that the ControllerAdviceBean instances in the returned list are sorted using OrderComparator.sort(List).

See Also:

• getOrder()
• OrderComparator
• Ordered