package com.atlassian.cache.impl;
   
   import javax.annotation.Nonnull;
   
   import com.atlassian.cache.CacheEntryEvent;
   
   import static com.google.common.base.Preconditions.checkNotNull;
   
   /**
   * A default implementation for {@code CacheEntryEvent}
   */
  public class DefaultCacheEntryEvent<K, V> implements CacheEntryEvent<K, V>
  {
      private final K key;
      private final V value;
      private final V oldValue;
  
      public DefaultCacheEntryEvent(@Nonnull K key, V value, V oldValue)
      {
          this.key = checkNotNull(key);
          this.value = value;
          this.oldValue = oldValue;
      }
  
      @Override
      @Nonnull
      public K getKey()
      {
          return key;
      }
  
      @Override
      public V getValue()
      {
          return value;
      }
  
      @Override
      public V getOldValue()
      {
          return oldValue;
      }
  }