org.springframework.context.event

Class GenericApplicationListenerAdapter

java.lang.Object

org.springframework.context.event.GenericApplicationListenerAdapter

All Implemented Interfaces:

java.util.EventListener, ApplicationListener<ApplicationEvent>, SmartApplicationListener, Ordered

public class GenericApplicationListenerAdapter
extends java.lang.Object
implements SmartApplicationListener

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

Since:

3.0

Author:

Juergen Hoeller

See Also:

ApplicationListener.onApplicationEvent(E)

Field Summary

Fields

Modifier and Type	Field and Description
private ApplicationListener<ApplicationEvent>	delegate

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
int	getOrder() Return the order value of this object, with a higher value meaning greater in terms of sorting.
void	onApplicationEvent(ApplicationEvent event) Handle an application event.
(package private) static java.lang.Class<?>	resolveDeclaredEventType(java.lang.Class<?> listenerType)
boolean	supportsEventType(java.lang.Class<? extends ApplicationEvent> eventType) Determine whether this listener actually supports the given event type.
boolean	supportsSourceType(java.lang.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

Field Detail

delegate

private final ApplicationListener<ApplicationEvent> delegate

Constructor Detail

GenericApplicationListenerAdapter

public GenericApplicationListenerAdapter(ApplicationListener<?> delegate)

Create a new GenericApplicationListener for the given delegate.

Parameters:

delegate - the delegate listener to be invoked

Method Detail

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(java.lang.Class<? extends ApplicationEvent> eventType)

Description copied from interface: SmartApplicationListener

Determine whether this listener actually supports the given event type.

Specified by:

supportsEventType in interface SmartApplicationListener

supportsSourceType

public boolean supportsSourceType(java.lang.Class<?> sourceType)

Description copied from interface: SmartApplicationListener

Determine whether this listener actually supports the given source type.

Specified by:

supportsSourceType in interface SmartApplicationListener

getOrder

public int getOrder()

Description copied from interface: Ordered

Return the order value of this object, with a higher value meaning greater in terms of sorting.

Normally starting with 0, with Integer.MAX_VALUE indicating the greatest value. Same order values will result in arbitrary positions for the affected objects.

Higher values can be interpreted as lower priority. As a consequence, the object with the lowest value has highest priority (somewhat analogous to Servlet "load-on-startup" values).

Specified by:

getOrder in interface Ordered

Returns:

the order value

resolveDeclaredEventType

static java.lang.Class<?> resolveDeclaredEventType(java.lang.Class<?> listenerType)