72 lines
2.4 KiB
C#
72 lines
2.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace BS.Shared.Core
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{
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public class AbstractIDSpecificDefaultClass<T> where T : AbstractIDSpecificDefaultClass<T>, new()
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{
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#region Constants and Fields
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protected string _SpecificID = string.Empty;
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private static readonly Dictionary<string, T> _InstanceCache = new Dictionary<string, T>();
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#endregion
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#region Constructors and Destructors
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protected AbstractIDSpecificDefaultClass() {}
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#endregion
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#region Public Methods
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public static T GetInstance(string specificId, string tenant = null)
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{
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if (specificId == null)
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specificId = tenant;
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if (!string.IsNullOrEmpty(specificId))
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{
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if (_InstanceCache.ContainsKey(specificId))
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{
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return _InstanceCache[specificId];
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}
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var cbSpecific = typeof(T).Assembly.GetTypes()
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.Where(i => typeof(T).IsAssignableFrom(i))
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.FirstOrDefault(t => t.GetCustomAttributes(typeof(IDSpecificClassAttribute), true)
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.ToList()
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.Exists(i =>
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{
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var attr = (IDSpecificClassAttribute)i;
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if (attr.Identifiers != null)
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return attr.Identifiers.Contains(specificId);
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if (!String.IsNullOrEmpty(attr.Identifier))
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return attr.Identifier.Equals(specificId);
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return false;
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}));
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if (cbSpecific != null)
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{
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var instance = Activator.CreateInstance(cbSpecific) as T;
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instance._SpecificID = specificId;
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_InstanceCache.Add(specificId, instance);
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return _InstanceCache[specificId];
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}
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}
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if (!_InstanceCache.ContainsKey(string.Empty))
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{
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_InstanceCache.Add(string.Empty,
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new T
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{
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_SpecificID = specificId
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});
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}
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return _InstanceCache[string.Empty];
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}
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#endregion
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}
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} |