1 files changed, 70 insertions, 0 deletions

diff --git a/src/WixToolset.Data/IntermediateTuple.cs b/src/WixToolset.Data/IntermediateTuple.cs
new file mode 100644
index 00000000..36cee2aa
--- /dev/null
+++ b/src/WixToolset.Data/IntermediateTuple.cs
@@ -0,0 +1,70 @@
+// 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 SimpleJson;
+
+    public class IntermediateTuple
+    {
+        //public IntermediateTuple(IntermediateTupleDefinition definition) : this(definition, null, null)
+        //{
+        //}
+
+        public IntermediateTuple(IntermediateTupleDefinition definition, SourceLineNumber sourceLineNumber, Identifier id = null)
+        {
+            this.Definition = definition;
+            this.Fields = new IntermediateField[definition.FieldDefinitions.Length];
+            this.SourceLineNumbers = sourceLineNumber;
+            this.Id = id;
+        }
+
+        public IntermediateTupleDefinition Definition { get; }
+
+        public IntermediateField[] Fields { get; }
+
+        public SourceLineNumber SourceLineNumbers { get; set; }
+
+        public Identifier Id { get; set; }
+
+        public IntermediateField this[int index] => this.Fields[index];
+
+        internal static IntermediateTuple Deserialize(ITupleDefinitionCreator creator, JsonObject jsonObject)
+        {
+            var definitionName = jsonObject.GetValueOrDefault<string>("def");
+            var fieldsJson = jsonObject.GetValueOrDefault<JsonArray>("fields");
+
+            creator.TryGetTupleDefinitionByName(definitionName, out var definition); // TODO: this isn't sufficient.
+            var tuple = definition.CreateTuple();
+
+            for (var i = 0; i < fieldsJson.Count; ++i)
+            {
+                if (tuple.Fields.Length > i && fieldsJson[i] is JsonObject fieldJson)
+                {
+                    tuple.Fields[i] = IntermediateField.Deserialize(tuple.Definition.FieldDefinitions[i], fieldJson);
+                }
+            }
+
+            return tuple;
+        }
+
+        internal JsonObject Serialize()
+        {
+            var jsonObject = new JsonObject
+            {
+                { "def", this.Definition.Name }
+            };
+
+            var fieldsJson = new JsonArray(this.Fields.Length);
+
+            foreach (var field in this.Fields)
+            {
+                var fieldJson = field?.Serialize();
+                fieldsJson.Add(fieldJson);
+            }
+
+            jsonObject.Add("fields", fieldsJson);
+
+            return jsonObject;
+        }
+    }
+}