/*
* JBoss, Home of Professional Open Source
* Copyright 2009 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.notifications.cachelistener.event;
/**
* This event subtype is passed in to any method annotated with {@link org.infinispan.notifications.cachelistener.annotation.CacheEntryModified}
* <p />
* The {@link #getValue()} method's behavior is specific to whether the callback is triggered before or after the event
* in question. For example, if <tt>event.isPre()</tt> is <tt>true</tt>, then <tt>event.getValue()</tt> would return the
* <i>old</i> value, prior to modification. If <tt>event.isPre()</tt> is <tt>false</tt>, then <tt>event.getValue()</tt>
* would return new <i>new</i> value. If the event is creating and inserting a new entry, the old value would be <tt>null</tt>.
* <p />
* @author Manik Surtani
* @since 4.0
*/
public interface CacheEntryModifiedEvent<K, V> extends CacheEntryEvent<K, V> {
/**
* Retrieves the value of the entry being modified.
* <p />
* @return the previous or new value of the entry, depending on whether isPre() is true or false.
*/
V getValue();
}