Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,60 @@
+//---------------------------------------------------------------------
+// <copyright file="ModelPerspective.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       [....]
+// @backupOwner [....]
+//---------------------------------------------------------------------
+
+namespace System.Data.Metadata.Edm
+{
+    using System.Collections.Generic;
+    using System.Globalization;
+
+    /// <summary>
+    /// Internal helper class for query
+    /// </summary>
+    internal class ModelPerspective : Perspective
+    {
+        #region Contructors
+        /// <summary>
+        /// Creates a new instance of perspective class so that query can work
+        /// ignorant of all spaces
+        /// </summary>
+        /// <param name="metadataWorkspace">runtime metadata container</param>
+        internal ModelPerspective(MetadataWorkspace metadataWorkspace)
+            : base(metadataWorkspace, DataSpace.CSpace)
+        {
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// Look up a type in the target data space based upon the fullName
+        /// </summary>
+        /// <param name="fullName">fullName</param>
+        /// <param name="ignoreCase">true for case-insensitive lookup</param>
+        /// <param name="typeUsage">The type usage object to return</param>
+        /// <returns>True if the retrieval succeeded</returns>
+        internal override bool TryGetTypeByName(string fullName, bool ignoreCase, out TypeUsage typeUsage )
+        {
+            EntityUtil.CheckStringArgument(fullName, "fullName");
+            typeUsage = null;
+            EdmType edmType = null;
+            if (this.MetadataWorkspace.TryGetItem<EdmType>(fullName, ignoreCase, this.TargetDataspace, out edmType))
+            {
+                if (Helper.IsPrimitiveType(edmType))
+                {
+                    typeUsage = this.MetadataWorkspace.GetCanonicalModelTypeUsage(((PrimitiveType)edmType).PrimitiveTypeKind);
+                }
+                else
+                {
+                    typeUsage = TypeUsage.Create(edmType);
+                }
+            }
+            return typeUsage != null;
+        }
+        #endregion
+    }
+}