using System;
using Chernobyl.Collections.Generic.Event;
using Chernobyl.Values;

namespace Chernobyl.Attribution
{
    /// <summary>
    /// An <see cref="IStorageAttribute{TKey, TValue}"/> type that creates a
    /// static <see cref="IEventDictionary{TKey, TValue}"/> as the storage
    /// container.
    /// </summary>
    public class StaticStorageAttribute : Attribute, IStorageAttribute<Object, IValue<Object>>
    {
        /// <summary>
        /// A default instance of this class containing a the static container.
        /// </summary>
        public static readonly StaticStorageAttribute Default = new StaticStorageAttribute();

        /// <summary>
        /// The container the instance(s) are to be stored.
        /// </summary>
        public IEventDictionary<Object, IValue<Object>> Container
        {
            get { return StaticContainer; }
        }

        /// <summary>
        /// The backing field to <see cref="Container"/>.
        /// </summary>
        static readonly IEventDictionary<Object, IValue<Object>> StaticContainer =
            new DecoratingEventDictionary<Object, IValue<Object>>();
    }
}