using System;

namespace JD.Collections
{
    /// <summary>
    /// Caches values based on a key.
    /// </summary>
    public class KeyedCache<TKey, TValue> : KeyedCacheBase<TKey, TValue>
    {
        /// <summary>
        /// Returns the value for the key, (if not cached, will use the provider).
        /// </summary>
        /// <param name="key"></param>
        /// <param name="provider"></param>
        /// <returns></returns>
        public TValue this[TKey key, Func<TValue> provider]
        {
            get
            {
                return base[key, delegate { return provider(); }];
            }
        }
    }
}