Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Configuration/HandlerFactoryWrapper.cs

@@ -0,0 +1,45 @@
+//------------------------------------------------------------------------------
+// <copyright file="HandlerFactoryWrapper.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+/*
+ * Config related classes for HttpApplication
+ */
+
+namespace System.Web.Configuration {
+
+    using System;
+    using System.Web.Util;
+
+    /*
+     * Single instance handler factory
+     */
+    internal class HandlerFactoryWrapper : IHttpHandlerFactory {
+        private IHttpHandler _handler;
+        private Type _handlerType;
+
+        internal HandlerFactoryWrapper(IHttpHandler handler, Type handlerType) {
+            _handler = handler;
+            _handlerType = handlerType;
+        }
+
+        public IHttpHandler GetHandler(HttpContext context, String requestType, String url, String pathTranslated) {
+            if (_handler == null)
+                _handler = (IHttpHandler)HttpRuntime.CreateNonPublicInstance(_handlerType);
+
+            return _handler;
+        }
+
+        public void ReleaseHandler(IHttpHandler handler) {
+            if (_handler != null) {
+                Debug.Assert(handler == _handler);
+
+                if (!_handler.IsReusable) {
+                    _handler = null;
+                }
+            }
+        }
+    }
+}