001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.commons.jcs.jcache;
020
021import javax.cache.Cache;
022import javax.cache.event.CacheEntryEvent;
023import javax.cache.event.EventType;
024
025public class JCSCacheEntryEvent<K, V> extends CacheEntryEvent<K, V>
026{
027    /** Serial version */
028    private static final long serialVersionUID = 4761272981003897488L;
029
030    private final V old;
031    private final K key;
032    private final V value;
033
034    public JCSCacheEntryEvent(final Cache<K, V> source, final EventType eventType, final V old, final K key, final V value)
035    {
036        super(source, eventType);
037        this.old = old;
038        this.key = key;
039        this.value = value;
040    }
041
042    @Override
043    public V getOldValue()
044    {
045        return old;
046    }
047
048    @Override
049    public boolean isOldValueAvailable()
050    {
051        return old != null;
052    }
053
054    @Override
055    public K getKey()
056    {
057        return key;
058    }
059
060    @Override
061    public V getValue()
062    {
063        return value;
064    }
065
066    @Override
067    public <T> T unwrap(final Class<T> clazz)
068    {
069        if (clazz.isInstance(this))
070        {
071            return clazz.cast(this);
072        }
073        throw new IllegalArgumentException(clazz.getName() + " not supported in unwrap");
074    }
075}