Package org.apache.commons.configuration2.event

Class EventListenerRegistrationData<T extends Event>

java.lang.Object

org.apache.commons.configuration2.event.EventListenerRegistrationData<T>

Type Parameters:

T - the type of events processed by the listener

public final class EventListenerRegistrationData<T extends Event>
extends java.lang.Object

A data class holding information about an event listener registration.

An instance of this class stores all information required to determine whether a specific event listener is to be invoked for a given event. The class is used internally by EventListenerList, but is also useful in general when information about event listeners is to be stored.

Implementation note: Instances of this class are immutable and can safely be shared between multiple threads or components.

Since:

2.0

Version:

$Id: EventListenerRegistrationData.java 1678628 2015-05-10 20:18:43Z oheger $

Constructor Summary

Constructors

Constructor	Description
EventListenerRegistrationData(EventType<T> type, EventListener<? super T> lstnr)	Creates a new instance of EventListenerRegistrationData.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)	Compares this object with another one.
EventType<T>	getEventType()	Returns the event type for this listener registration.
EventListener<? super T>	getListener()	Returns the listener this registration is about.
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

EventListenerRegistrationData

public EventListenerRegistrationData(EventType<T> type,
                                     EventListener<? super T> lstnr)

Creates a new instance of EventListenerRegistrationData.

Parameters:

type - the event type (must not be null)

lstnr - the event listener (must not be null)

Throws:

java.lang.IllegalArgumentException - if a required parameter is null

Method Detail

getEventType

public EventType<T> getEventType()

Returns the event type for this listener registration.

Returns:

the event type

getListener

public EventListener<? super T> getListener()

Returns the listener this registration is about.

Returns:

the event listener

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Compares this object with another one. Two instances of EventListenerRegistrationData are considered equal if they reference the same listener and event type.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the object to be compared to

Returns:

a flag whether these objects are equal