001package org.apache.commons.jcs.engine.control.event; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.util.EventObject; 023 024import org.apache.commons.jcs.engine.control.event.behavior.ElementEventType; 025import org.apache.commons.jcs.engine.control.event.behavior.IElementEvent; 026 027/** 028 * Element events will trigger the creation of Element Event objects. This is a wrapper around the 029 * cache element that indicates the event triggered. 030 */ 031public class ElementEvent<T> 032 extends EventObject 033 implements IElementEvent<T> 034{ 035 /** Don't change */ 036 private static final long serialVersionUID = -5364117411457467056L; 037 038 /** default event code */ 039 private ElementEventType elementEvent = ElementEventType.EXCEEDED_MAXLIFE_BACKGROUND; 040 041 /** 042 * Constructor for the ElementEvent object 043 * <p> 044 * @param source The Cache Element 045 * @param elementEvent The event id defined in the enum class. 046 */ 047 public ElementEvent( T source, ElementEventType elementEvent ) 048 { 049 super( source ); 050 this.elementEvent = elementEvent; 051 } 052 053 /** 054 * Gets the elementEvent attribute of the ElementEvent object 055 * <p> 056 * @return The elementEvent value. The List of values is defined in ElementEventType. 057 */ 058 @Override 059 public ElementEventType getElementEvent() 060 { 061 return elementEvent; 062 } 063 064 /** 065 * @return the source of the event. 066 */ 067 @SuppressWarnings("unchecked") // Generified 068 @Override 069 public T getSource() 070 { 071 return (T) super.getSource(); 072 073 } 074}