/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.commons.jcs3.jcache;
  
  import javax.cache.Cache;
  import javax.cache.event.CacheEntryEvent;
  import javax.cache.event.EventType;
  
  public class JCSCacheEntryEvent<K, V> extends CacheEntryEvent<K, V>
  {
      /** Serial version */
      private static final long serialVersionUID = 4761272981003897488L;
  
      private final V old;
      private final K key;
      private final V value;
  
      public JCSCacheEntryEvent(final Cache<K, V> source, final EventType eventType, final V old, final K key, final V value)
      {
          super(source, eventType);
          this.old = old;
          this.key = key;
          this.value = value;
      }
  
      @Override
      public V getOldValue()
      {
          return old;
      }
  
      @Override
      public boolean isOldValueAvailable()
      {
          return old != null;
      }
  
      @Override
      public K getKey()
      {
          return key;
      }
  
      @Override
      public V getValue()
      {
          return value;
      }
  
      @Override
      public <T> T unwrap(final Class<T> clazz)
      {
          if (clazz.isInstance(this))
          {
              return clazz.cast(this);
          }
          throw new IllegalArgumentException(clazz.getName() + " not supported in unwrap");
      }
  }