1 files changed, 47 insertions, 0 deletions

diff --git a/src/WixToolset.Data/IntermediateTupleDefinition.cs b/src/WixToolset.Data/IntermediateTupleDefinition.cs
new file mode 100644
index 00000000..5658cfe9
--- /dev/null
+++ b/src/WixToolset.Data/IntermediateTupleDefinition.cs
@@ -0,0 +1,47 @@
+// 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.Data
+{
+    using System;
+
+    public class IntermediateTupleDefinition
+    {
+        public IntermediateTupleDefinition(string name, IntermediateFieldDefinition[] fieldDefinitions, Type strongTupleType)
+            : this(TupleDefinitionType.MustBeFromAnExtension, name, fieldDefinitions, strongTupleType)
+        {
+        }
+
+        internal IntermediateTupleDefinition(TupleDefinitionType type, IntermediateFieldDefinition[] fieldDefinitions, Type strongTupleType)
+            : this(type, type.ToString(), fieldDefinitions, strongTupleType)
+        {
+        }
+
+        private IntermediateTupleDefinition(TupleDefinitionType type, string name, IntermediateFieldDefinition[] fieldDefinitions, Type strongTupleType)
+        {
+            this.Type = type;
+            this.Name = name;
+            this.FieldDefinitions = fieldDefinitions;
+            this.StrongTupleType = strongTupleType ?? typeof(IntermediateTuple);
+#if DEBUG
+            if (!this.StrongTupleType.IsSubclassOf(typeof(IntermediateTuple))) throw new ArgumentException(nameof(strongTupleType));
+#endif
+        }
+
+        public TupleDefinitionType Type { get; }
+
+        public string Name { get; }
+
+        public IntermediateFieldDefinition[] FieldDefinitions { get; }
+
+        private Type StrongTupleType { get; }
+
+        public IntermediateTuple CreateTuple(SourceLineNumber sourceLineNumber = null, Identifier id = null)
+        {
+            var result = (this.StrongTupleType == typeof(IntermediateTuple)) ? (IntermediateTuple)Activator.CreateInstance(this.StrongTupleType, this) : (IntermediateTuple)Activator.CreateInstance(this.StrongTupleType);
+            result.SourceLineNumbers = sourceLineNumber;
+            result.Id = id;
+
+            return result;
+        }
+    }
+}