package com.atlassian.cache.memory;
   
   import com.atlassian.cache.CacheException;
   import com.atlassian.cache.CacheSettings;
   import com.atlassian.cache.CachedReference;
   import com.atlassian.cache.impl.ReferenceKey;
   import com.google.common.cache.LoadingCache;
   import com.google.common.util.concurrent.UncheckedExecutionException;
   
  import javax.annotation.Nullable;
  
  /**
   * A Lazy Reference that delegates Concurrent Map.
   *
   * @since 2.0
   */
  class DelegatingCachedReference<V> extends ManagedCacheSupport implements CachedReference<V>
  {
      private final LoadingCache<ReferenceKey, V> internalCache;
  
      private DelegatingCachedReference(final LoadingCache<ReferenceKey, V> internalCache,
              String name, CacheSettings settings)
      {
          super(name, settings);
          this.internalCache = internalCache;
      }
  
      static <V> DelegatingCachedReference<V> create(final LoadingCache<ReferenceKey, V> internalCache,
              String name, CacheSettings settings)
      {
          return new DelegatingCachedReference<V>(internalCache, name, settings);
      }
  
      @Override
      public V get()
      {
          try
          {
              return internalCache.get(ReferenceKey.KEY);
          }
          catch (UncheckedExecutionException e)
          {
              throw new CacheException(e.getCause());
          }
          catch (Exception e)
          {
              throw new CacheException(e);
          }
      }
  
      @Override
      public void reset()
      {
          try
          {
              internalCache.invalidate(ReferenceKey.KEY);
          }
          catch (Exception e)
          {
              throw new CacheException(e);
          }
      }
  
      @Override
      public void clear()
      {
          reset();
      }
  
      @Override
      public boolean equals(@Nullable final Object other)
      {
          if (other instanceof DelegatingCachedReference)
          {
              DelegatingCachedReference otherDelegatingReference = (DelegatingCachedReference) other;
              if (internalCache.equals(otherDelegatingReference.internalCache))
              {
                  return true;
              }
          }
          return false;
      }
  
      @Override
      public int hashCode()
      {
          return 3 + internalCache.hashCode();
      }
  }