/*------------------------------------------------------------------
-- COPYRIGHT (C) 2010-2012  PFC
-- ALL RIGHTS RESERVED.
-- 汉和信息
-- CREATE DATE: 2010/08/05
-- CREATE MAN:	姜新军
-- 业务逻辑层基类
-- MODIFY HISTORY:
-- MODIFY DATE:
-- MODIFY MAN:	
-- MODIFY DESC:
-- MODIFY DATE:
-- MODIFY MAN:	
-- MODIFY DESC:
---------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Text;
using HW.DAL;

namespace HW.BLL
{
    /// <summary>
    /// 业务逻辑层基类
    /// </summary>
    public abstract class BaseBLL 
    {
        private Dictionary<Type, object> cacheInstance;

        internal Dictionary<Type, object> CacheInstance
        {
            get
            {
                if (cacheInstance == null)
                {
                    cacheInstance = new Dictionary<Type, object>();
                }
                return cacheInstance;
            }
        }

        internal T CreateDAL<T>()
            where T : BaseDAL, new()
        {
            return CreateDAL<T>(true);
        }

        internal T CreateDAL<T>(bool isUseCache)
            where T : BaseDAL, new()
        {
            if (!isUseCache)
            {
                return DAOManager.Create<T>();
            }

            Type type = typeof(T);

            if (!CacheInstance.ContainsKey(type))
            {
                CacheInstance.Add(type, DAOManager.Create<T>());
            }

            return CacheInstance[type] as T;
        }
    }
}