From 7cd73426430db7ac5bfbdd33636566124bfaf743 Mon Sep 17 00:00:00 2001
From: Philemon Eichin <phileicht@gmx.de>
Date: Thu, 12 Apr 2018 11:09:54 +0200
Subject: [PATCH] Implement TargetObjectContextProvider

---
 .../TargetObjectContextProvider.cs            | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 phirSOFT.ContextProperties/TargetObjectContextProvider.cs

diff --git a/phirSOFT.ContextProperties/TargetObjectContextProvider.cs b/phirSOFT.ContextProperties/TargetObjectContextProvider.cs
new file mode 100644
index 0000000..5d61e96
--- /dev/null
+++ b/phirSOFT.ContextProperties/TargetObjectContextProvider.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace phirSOFT.ContextProperties
+{
+    /// <summary>
+    /// Implements a <see cref="IContextProvider{TProperty,TValue}"/> that redirects the calls to the target object if possible.
+    /// </summary>
+    /// <typeparam name="TProperty">THe type of the property.</typeparam>
+    /// <typeparam name="TValue">The type of the value.</typeparam>
+    public class TargetObjectContextProvider<TProperty, TValue> : IContextProvider<TProperty, TValue> where TProperty : IContextProperty<TValue>
+    {
+        /// <inheritdoc cref="IContextProvider{TProperty,TValue}.GetValue"/>
+        public TValue GetValue(object targetObject, TProperty targetProperty)
+        {
+            return ((IContextProvider<TProperty, TValue>) targetObject).GetValue(targetObject, targetProperty);
+        }
+
+        /// <inheritdoc cref="IContextProvider{TProperty,TValue}.OverridesValue"/>
+        public bool OverridesValue(object targetObject, TProperty targetProperty)
+        {
+            return targetObject is IContextProvider<TProperty, TValue> provider &&
+                   provider.OverridesValue(targetObject, targetProperty);
+        }
+    }
+}