Package org.springframework.context.event

Class GenericApplicationListenerAdapter

java.lang.Object

org.springframework.context.event.GenericApplicationListenerAdapter

All Implemented Interfaces:

EventListener, ApplicationListener<ApplicationEvent>, GenericApplicationListener, SmartApplicationListener, Ordered

public class GenericApplicationListenerAdapter
extends Object
implements GenericApplicationListener

GenericApplicationListener adapter that determines supported event types through introspecting the generically declared type of the target listener.

Since:

3.0

Author:

Juergen Hoeller, Stephane Nicoll

See Also:

• ApplicationListener.onApplicationEvent(E)

Field Summary

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
GenericApplicationListenerAdapter(ApplicationListener<?> delegate)	Create a new GenericApplicationListener for the given delegate.

Method Summary

Modifier and Type	Method	Description
String	getListenerId()	Return an optional identifier for the listener.
int	getOrder()	Determine this listener's order in a set of listeners for the same event.
void	onApplicationEvent(ApplicationEvent event)	Handle an application event.
boolean	supportsEventType(ResolvableType eventType)	Determine whether this listener actually supports the given event type.
boolean	supportsSourceType(Class<?> sourceType)	Determine whether this listener actually supports the given source type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.context.event.GenericApplicationListener

supportsEventType

Constructor Details

GenericApplicationListenerAdapter

public GenericApplicationListenerAdapter(ApplicationListener<?> delegate)

Create a new GenericApplicationListener for the given delegate.

Parameters:

delegate - the delegate listener to be invoked

Method Details

onApplicationEvent

public void onApplicationEvent(ApplicationEvent event)

Description copied from interface: ApplicationListener

Handle an application event.

Specified by:

onApplicationEvent in interface ApplicationListener<ApplicationEvent>

Parameters:

event - the event to respond to

supportsEventType

public boolean supportsEventType(ResolvableType eventType)

Description copied from interface: GenericApplicationListener

Determine whether this listener actually supports the given event type.

Specified by:

supportsEventType in interface GenericApplicationListener

Parameters:

eventType - the event type (never null)

supportsSourceType

public boolean supportsSourceType(@Nullable
 Class<?> sourceType)

Description copied from interface: SmartApplicationListener

Determine whether this listener actually supports the given source type.

The default implementation always returns true.

Specified by:

supportsSourceType in interface SmartApplicationListener

Parameters:

sourceType - the source type, or null if no source

getOrder

public int getOrder()

Description copied from interface: SmartApplicationListener

Determine this listener's order in a set of listeners for the same event.

The default implementation returns Ordered.LOWEST_PRECEDENCE.

Specified by:

getOrder in interface Ordered

Specified by:

getOrder in interface SmartApplicationListener

Returns:

the order value

See Also:

• Ordered.HIGHEST_PRECEDENCE
• Ordered.LOWEST_PRECEDENCE

getListenerId

public String getListenerId()

Description copied from interface: SmartApplicationListener

Return an optional identifier for the listener.

The default value is an empty String.

Specified by:

getListenerId in interface SmartApplicationListener

See Also:

• EventListener.id()
• ApplicationEventMulticaster.removeApplicationListeners(java.util.function.Predicate<org.springframework.context.ApplicationListener<?>>)