org.springframework.context.event

## Class GenericApplicationListenerAdapter

- java.lang.Object
- - org.springframework.context.event.GenericApplicationListenerAdapter

- All Implemented Interfaces:
    EventListener, ApplicationListener<ApplicationEvent>, SmartApplicationListener, Ordered

      public class GenericApplicationListenerAdapter
      extends 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 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

    Methods
    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.
    `boolean` | `supportsEventType(Class<? extends ApplicationEvent> 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`

- - ### 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(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(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