Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.SqlXml/System/Xml/Xsl/Runtime/EarlyBoundInfo.cs

@@ -0,0 +1,64 @@
+//------------------------------------------------------------------------------
+// <copyright file="EarlyBoundInfo.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+// <owner current="false">[....]</owner>
+//------------------------------------------------------------------------------
+
+using System.Diagnostics;
+using System.Reflection;
+
+namespace System.Xml.Xsl.Runtime {
+
+    /// <summary>
+    /// This class contains information about early bound function objects.
+    /// </summary>
+    internal sealed class EarlyBoundInfo {
+        private string namespaceUri;            // Namespace Uri mapped to these early bound functions
+        private ConstructorInfo constrInfo;     // Constructor for the early bound function object
+
+        public EarlyBoundInfo(string namespaceUri, Type ebType) {
+            Debug.Assert(namespaceUri != null && ebType != null);
+
+            // Get the default constructor
+            this.namespaceUri = namespaceUri;
+            this.constrInfo = ebType.GetConstructor(Type.EmptyTypes);
+            Debug.Assert(this.constrInfo != null, "The early bound object type " + ebType.FullName + " must have a public default constructor");
+        }
+
+        /// <summary>
+        /// Get the Namespace Uri mapped to these early bound functions.
+        /// </summary>
+        public string NamespaceUri { get { return this.namespaceUri; } }
+
+        /// <summary>
+        /// Return the Clr Type of the early bound object.
+        /// </summary>
+        public Type EarlyBoundType { get { return this.constrInfo.DeclaringType; } }
+
+        /// <summary>
+        /// Create an instance of the early bound object.
+        /// </summary>
+        public object CreateObject() { return this.constrInfo.Invoke(new object[] {}); }
+
+        /// <summary>
+        /// Override Equals method so that EarlyBoundInfo to implement value comparison.
+        /// </summary>
+        public override bool Equals(object obj) {
+            EarlyBoundInfo info = obj as EarlyBoundInfo;
+            if (info == null)
+                return false;
+
+            return this.namespaceUri == info.namespaceUri && this.constrInfo == info.constrInfo;
+        }
+
+        /// <summary>
+        /// Override GetHashCode since Equals is overriden.
+        /// </summary>
+        public override int GetHashCode() {
+            return this.namespaceUri.GetHashCode();
+        }
+    }
+}
+