From e85821ce66a2f591a4751852e1b74de4601a01a5 Mon Sep 17 00:00:00 2001
From: Paul Schneider <paul@pschneider.fr>
Date: Sun, 18 Sep 2016 00:21:27 +0200
Subject: [PATCH] implements a read only data access, data that is not intent
 to be changed

---
 BookAStar/BookAStar/Helpers/RemoteEntityRO.cs | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 BookAStar/BookAStar/Helpers/RemoteEntityRO.cs

diff --git a/BookAStar/BookAStar/Helpers/RemoteEntityRO.cs b/BookAStar/BookAStar/Helpers/RemoteEntityRO.cs
new file mode 100644
index 00000000..9688d23d
--- /dev/null
+++ b/BookAStar/BookAStar/Helpers/RemoteEntityRO.cs
@@ -0,0 +1,24 @@
+using BookAStar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BookAStar.Helpers
+{
+    class RemoteEntityRO<V,K>: RemoteEntity<V,K> where K: IEquatable<K>
+    {
+        public RemoteEntityRO (string controllerName,
+            Func<V,K> getKey) : base(controllerName,getKey)
+        {
+        }
+
+        protected override void UpdateOrAdd(V item)
+        {
+            var key = GetKey(item);
+            if (this.Any(x => GetKey(x).Equals(key))) { return; }
+            Add(item);
+        }
+    }
+}