1 files changed, 75 insertions, 0 deletions

diff --git a/src/WixToolset.Extensibility/ExtensionData.cs b/src/WixToolset.Extensibility/ExtensionData.cs
new file mode 100644
index 00000000..4cf262b9
--- /dev/null
+++ b/src/WixToolset.Extensibility/ExtensionData.cs
@@ -0,0 +1,75 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Extensibility
+{
+    using System;
+    using System.IO;
+    using System.Reflection;
+    using System.Xml;
+    using WixToolset.Data;
+
+    public abstract class ExtensionData : IExtensionData
+    {
+        /// <summary>
+        /// Gets the optional table definitions for this extension.
+        /// </summary>
+        /// <value>Table definisions for this extension or null if there are no table definitions.</value>
+        public virtual TableDefinitionCollection TableDefinitions
+        {
+            get { return null; }
+        }
+
+        /// <summary>
+        /// Gets the optional default culture.
+        /// </summary>
+        /// <value>The optional default culture.</value>
+        public virtual string DefaultCulture
+        {
+            get { return null; }
+        }
+
+        /// <summary>
+        /// Gets the optional library associated with this extension.
+        /// </summary>
+        /// <param name="tableDefinitions">The table definitions to use while loading the library.</param>
+        /// <returns>The library for this extension or null if there is no library.</returns>
+        public virtual Library GetLibrary(TableDefinitionCollection tableDefinitions)
+        {
+            return null;
+        }
+
+        /// <summary>
+        /// Help for loading a library from an embedded resource.
+        /// </summary>
+        /// <param name="assembly">The assembly containing the embedded resource.</param>
+        /// <param name="resourceName">The name of the embedded resource being requested.</param>
+        /// <param name="tableDefinitions">The table definitions to use while loading the library.</param>
+        /// <returns>The loaded library.</returns>
+        protected static Library LoadLibraryHelper(Assembly assembly, string resourceName, TableDefinitionCollection tableDefinitions)
+        {
+            using (Stream resourceStream = assembly.GetManifestResourceStream(resourceName))
+            {
+                UriBuilder uriBuilder = new UriBuilder(assembly.CodeBase);
+                uriBuilder.Scheme = "embeddedresource";
+                uriBuilder.Fragment = resourceName;
+
+                return Library.Load(resourceStream, uriBuilder.Uri, tableDefinitions, false);
+            }
+        }
+
+        /// <summary>
+        /// Helper for loading table definitions from an embedded resource.
+        /// </summary>
+        /// <param name="assembly">The assembly containing the embedded resource.</param>
+        /// <param name="resourceName">The name of the embedded resource being requested.</param>
+        /// <returns>The loaded table definitions.</returns>
+        protected static TableDefinitionCollection LoadTableDefinitionHelper(Assembly assembly, string resourceName)
+        {
+            using (Stream resourceStream = assembly.GetManifestResourceStream(resourceName))
+            using (XmlReader reader = XmlReader.Create(resourceStream))
+            {
+                return TableDefinitionCollection.Load(reader);
+            }
+        }
+    }
+}