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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.event.service.spi;
import java.io.Serializable;
import org.hibernate.event.spi.EventType;
/**
* Contract for a groups of events listeners for a particular event type.
*
* @author Steve Ebersole
*/
public interface EventListenerGroup extends Serializable {
/**
* Retrieve the event type associated with this groups of listeners.
*
* @return The event type.
*/
public EventType getEventType();
/**
* Are there no listeners registered?
*
* @return {@literal true} if no listeners are registered; {@literal false} otherwise.
*/
public boolean isEmpty();
public int count();
public Iterable listeners();
/**
* Mechanism to more finely control the notion of duplicates.
*
* For example, say you are registering listeners for an extension library. This extension library
* could define a "marker interface" which indicates listeners related to it and register a strategy
* that checks against that marker interface.
*
* @param strategy The duplication strategy
*/
public void addDuplicationStrategy(DuplicationStrategy strategy);
public void appendListener(T listener);
public void appendListeners(T... listeners);
public void prependListener(T listener);
public void prependListeners(T... listeners);
public void clear();
}