Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/UI/WebParts/WebPartTransformer.cs

@@ -0,0 +1,31 @@
+//------------------------------------------------------------------------------
+// <copyright file="WebPartTransformer.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls.WebParts {
+
+    using System;
+    using System.ComponentModel;
+
+    public abstract class WebPartTransformer {
+
+        /// <devdoc>
+        /// Overridden by derived classes.  Should return a Control that implements
+        /// ITransformerConfigurationControl
+        /// </devdoc>
+        public virtual Control CreateConfigurationControl() {
+            return null;
+        }
+
+        protected internal virtual void LoadConfigurationState(object savedState) {
+        }
+
+        protected internal virtual object SaveConfigurationState() {
+            return null;
+        }
+
+        public abstract object Transform(object providerData);
+    }
+}