1 files changed, 91 insertions, 0 deletions
diff --git a/embedding/csharp/uSCXMLEmbedding/Extensions/CustomDataModel.cs b/embedding/csharp/uSCXMLEmbedding/Extensions/CustomDataModel.cs
new file mode 100644
index 0000000..b2ee1de
--- /dev/null
+++ b/embedding/csharp/uSCXMLEmbedding/Extensions/CustomDataModel.cs
@@ -0,0 +1,91 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using org.uscxml;
+
+namespace embedding
+{
+    class CustomDataModel : DataModel
+    {
+        public override DataModel create(Interpreter interpreter)
+        {
+            return new CustomDataModel();
+        }
+
+        public override void eval(string scriptElem, string expr)
+        {
+            // evaluate expr on the datamodel
+        }
+
+        public override bool evalAsBool(string elem, string content)
+        {
+            return evalAsBool(content);
+        }
+
+        public override bool evalAsBool(string expr)
+        {
+            // evaluate expr as bool
+            return false;
+        }
+
+        public override void assign(string assignElem, string location, string content)
+        {
+            // set variable at location to content
+        }
+
+        public override string evalAsString(string expr)
+        {
+            // evaluate given expr as a string (e.g. for <log>)
+            return "";
+        }
+
+        public override uint getLength(string expr)
+        {
+            // return the length of an expression for foreach
+            return 0;
+        }
+
+        public override StringList getNames()
+        {
+            // name of this datamodel to be used in scxml element
+            StringList names  = new StringList();
+            names.add("simple");
+            return names;
+        }
+
+        public override Data getStringAsData(string content)
+        {
+            Data data = new Data();
+            return data;
+        }
+
+        public override void init(string dataElem, string location, string content)
+        {
+            // initialize variable at location to evaluated content - used for scxml data elements
+        }
+
+        public override void setEvent(Event arg0)
+        {
+            // represent given event as _event in datamodel
+        }
+
+        public override bool isDeclared(string expr)
+        {
+            // using an undeclared variable is an error.execution with some scxml constructs - 
+            // determine whether the given expression is defined
+            return true;
+        }
+
+        public override void setForeach(string item, string array, string index, uint iteration)
+        {
+            // called per foreach iteration, set datamodel variables accordingly
+        }
+
+        public override bool validate(string location, string schema)
+        {
+            // primarily intended for xpath datamodel
+            return true;
+        }
+    }
+}