namespace Yes.Infrastructure.ViewEngine
{
    internal class EmptyArray<T>
    {
        private static T[] _instance;

        private EmptyArray()
        {
        }

        internal static T[] Instance
        {
            get
            {
                if (_instance == null)
                    _instance = new T[0];
                return _instance;
            }
        }

        internal static T[] Allocate(int n)
        {
            if (n == 0)
                return Instance;
            else
                return new T[n];
        }

        internal static T[] ToArray(IList<T> collection)
        {
            if (collection.Count == 0)
            {
                return Instance;
            }
            else
            {
                var array = new T[collection.Count];
                collection.CopyTo(array, 0);
                return array;
            }
        }
    }

    internal class EmptyArray
    {
        private static object[] _instance = new object[0];

        private EmptyArray()
        {
        }

        internal static object[] Instance
        {
            get
            {
                return _instance;
            }
        }

        internal static object[] Allocate(int n)
        {
            if (n == 0)
                return Instance;
            else
                return new object[n];
        }
    }
}