narsil/Tanshu.Accounts.Repository/Cache.cs

using NHibernate;
using Tanshu.Accounts.Entities;
using System.Linq;
using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Configuration;

namespace Tanshu.Accounts.Repository
{
    public class Cache
    {
        private static IList<ProductGroup> cache = null;
        private static Dictionary<int, PrintLocation> locations = new Dictionary<int, PrintLocation>();
        private static string location = ConfigurationManager.AppSettings["Location"].ToLowerInvariant();

        public static IList<ProductGroup> ProductGroups()
        {
            if (cache == null)
            {
                using (var bi = new ProductGroupBI())
                {
                    var list = bi.SaleList();
                    foreach (var item in list)
                    {
                        NHibernateUtil.Initialize(item.Products);
                    }
                    cache = list;
                }
            }
            return cache;
        }
        public static PrintLocation BasePrinter
        {
            get
            {
                if (!locations.ContainsKey(location.GetHashCode()))
                {
                    using (var bi = new PrintLocationBI())
                    {
                        var loc = bi.Get(x => x.Location == location && x.ProductGroup == null);
                        locations.Add(location.GetHashCode(), loc);
                    }
                }
                return locations[location.GetHashCode()];
            }
        }
        public static PrintLocation KotPrinter(Guid productGroupID)
        {
            if (!locations.ContainsKey(location.GetHashCode() ^ productGroupID.GetHashCode()))
            {
                using (var bi = new PrintLocationBI())
                {
                    var loc = bi.Get(x => x.Location == location && x.ProductGroup.ProductGroupID == productGroupID) ??
                             bi.Get(x => x.Location == location && x.ProductGroup == null);
                    locations.Add(location.GetHashCode() ^ productGroupID.GetHashCode(), loc);
                }
            }
            return locations[location.GetHashCode() ^ productGroupID.GetHashCode()];
        }
        public static void Invalidate()
        {
            cache = null;
            locations = new Dictionary<int, PrintLocation>();
        }
    }
}