icdsystems/ICD.Common.Utils
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Extension method for finding the minimal interfaces that a given type implements

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This commit is contained in:
Chris Cameron
2018-03-28 09:58:32 -04:00
parent 2e01d82d78
commit fb6ee9d468
1 changed files with 26 additions and 1 deletions
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27
ICD.Common.Utils/Extensions/TypeExtensions.cs
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@@ -46,7 +46,8 @@ namespace ICD.Common.Utils.Extensions
}; };
private static readonly Dictionary<Type, Type[]> s_TypeAllTypes; private static readonly Dictionary<Type, Type[]> s_TypeAllTypes;
private static readonly Dictionary<Type, Type[]> s_TypeBaseTypes; private static readonly Dictionary<Type, Type[]> s_TypeBaseTypes;
private static readonly Dictionary<Type, Type[]> s_TypeMinimalInterfaces;
/// <summary> /// <summary>
/// Static constructor. /// Static constructor.
@@ -55,6 +56,7 @@ namespace ICD.Common.Utils.Extensions
{ {
s_TypeAllTypes = new Dictionary<Type, Type[]>(); s_TypeAllTypes = new Dictionary<Type, Type[]>();
s_TypeBaseTypes = new Dictionary<Type, Type[]>(); s_TypeBaseTypes = new Dictionary<Type, Type[]>();
s_TypeMinimalInterfaces = new Dictionary<Type, Type[]>();
} }
/// <summary> /// <summary>
@@ -181,5 +183,28 @@ namespace ICD.Common.Utils.Extensions
yield return type; yield return type;
} while (type != null); } while (type != null);
} }
/// <summary>
/// Gets the smallest set of interfaces for the given type that cover all implemented interfaces.
/// </summary>
/// <param name="extends"></param>
/// <returns></returns>
public static IEnumerable<Type> GetMinimalInterfaces(this Type extends)
{
if (extends == null)
throw new ArgumentNullException("extends");
if (!s_TypeMinimalInterfaces.ContainsKey(extends))
{
Type[] allInterfaces = extends.GetInterfaces();
Type[] minimalInterfaces =
allInterfaces.Except(allInterfaces.SelectMany(t => t.GetInterfaces()))
.ToArray();
s_TypeMinimalInterfaces.Add(extends, minimalInterfaces);
}
return s_TypeMinimalInterfaces[extends];
}
} }
} }