using System;

namespace HStation.RevitDev.RevitDataExport.Utils
{
    public abstract class Singleton<T> where T : class
    {
        private static T _Instance;
        private static readonly object SyncObject = new object();

        public static T Instance
        {
            get
            {
                if (_Instance == null)
                {
                    lock (SyncObject)
                    {
                        if (_Instance == null)
                        {
                            _Instance = (T)Activator.CreateInstance(typeof(T), true);
                        }
                    }
                }

                return _Instance;
            }
        }
    }
}