Managers

Libraries/Esiur/Resource/Attributes/ResourceManagerAttribute.cs

@@ -0,0 +1,24 @@
+using Esiur.Security.Management;
+using System;
+
+namespace Esiur.Resource;
+
+/// <summary>
+/// Base metadata used to resolve a resource manager from its owning Warehouse.
+/// Manager attributes never create instances directly; the declared type must be
+/// registered with the Warehouse before the resource is created.
+/// </summary>
+public abstract class ResourceManagerAttribute : Attribute
+{
+    public Type ManagerType { get; }
+
+    protected ResourceManagerAttribute(Type managerType)
+    {
+        ManagerType = managerType ?? throw new ArgumentNullException(nameof(managerType));
+
+        if (!typeof(IResourceManager).IsAssignableFrom(managerType))
+            throw new ArgumentException(
+                $"Manager type `{managerType}` must implement {nameof(IResourceManager)}.",
+                nameof(managerType));
+    }
+}