Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Metadata/CustomAssemblyResolver.cs

@@ -0,0 +1,46 @@
+//---------------------------------------------------------------------
+// <copyright file="CustomAssemblyResolver.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       [....]
+// @backupOwner [....]
+//---------------------------------------------------------------------
+namespace System.Data.Metadata.Edm
+{
+    using System.Collections.Generic;
+    using System.Data.Entity;
+    using System.Diagnostics;
+    using System.Reflection;
+
+    internal class CustomAssemblyResolver : MetadataArtifactAssemblyResolver
+    {
+        private Func<AssemblyName, Assembly> _referenceResolver;
+        private Func<IEnumerable<Assembly>> _wildcardAssemblyEnumerator;
+
+        internal CustomAssemblyResolver(Func<IEnumerable<Assembly>> wildcardAssemblyEnumerator, Func<AssemblyName, Assembly> referenceResolver)
+        {
+            Debug.Assert(wildcardAssemblyEnumerator != null);
+            Debug.Assert(referenceResolver != null);
+            _wildcardAssemblyEnumerator = wildcardAssemblyEnumerator;
+            _referenceResolver = referenceResolver;
+        }
+
+        internal override bool TryResolveAssemblyReference(AssemblyName refernceName, out Assembly assembly)
+        {
+            assembly = _referenceResolver(refernceName);
+            return assembly != null;
+        }
+
+        internal override IEnumerable<Assembly> GetWildcardAssemblies()
+        {
+            IEnumerable<Assembly> wildcardAssemblies = _wildcardAssemblyEnumerator();
+            if (wildcardAssemblies == null)
+            {
+                throw EntityUtil.InvalidOperation(Strings.WildcardEnumeratorReturnedNull);
+            }
+            return wildcardAssemblies;
+
+        }
+    }
+}