Design and Implementation of an Attribute-Driven, Caching Data Abstraction Layer

using System;
using System.ComponentModel;

namespace BrainTechLLC.DAL
{
	public partial class DBLayer<T> : INotifyPropertyChanged, ISuppliesID where T : DBLayer<T>, IDBLayer<T>, new()
	{
		public static LookupCollection<T> Find
		{
			get
			{
				if (Cache == null) EnsureInitialized();
				return Cache.Find;
			}
		}

		// Supports generic retrieval of objects by unique key - implements ISuppliesID interface
		public DBLayer<T2> Get<T2>(int id) where T2 : DBLayer<T2>, IDBLayer<T2>, new() { return Get(id) as DBLayer<T2>; }
		public object GetObject(int id) { return DBLayer<T>.Find[id]; }
		public static T Get(int id) { return Find[id]; }

		public DBLayer<T2> Get<T2>(long id) where T2 : DBLayer<T2>, IDBLayer<T2>, new() { return Get(id) as DBLayer<T2>; }
		public long GetID() { PropertyDescriptor pd = CachedAttributes.QuickLookupProperty; return (pd == null) ? 0 : Convert.ToInt64(pd.GetValue(this)); }
		public object GetObject(long id) { return DBLayer<T>.Find[id]; }
		public static T Get(long id) { return Find[id]; }

		// Note - below method will throw an unhandled exception if the friendly object name property has a null value
		public string FriendlyObjectName { get { PropertyDescriptor pd = CachedAttributes.ObjectFriendlyNameProperty; return (pd == null) ? "" : Convert.ToString(pd.GetValue(this)); } }
	}
}