org.hibernate.event.service.spi.EventListenerGroup Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
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();
}