Web.Routing - refactor domains management

src/Umbraco.Web/Routing/SiteDomainHelperResolver.cs

@@ -0,0 +1,38 @@
+using System;
+using Umbraco.Core.ObjectResolution;
+
+namespace Umbraco.Web.Routing
+{
+	/// <summary>
+	/// Resolves the <see cref="ISiteDomainHelper"/> implementation.
+	/// </summary>
+	internal sealed class SiteDomainHelperResolver : SingleObjectResolverBase<SiteDomainHelperResolver, ISiteDomainHelper>
+	{
+		
+		/// <summary>
+        /// Initializes a new instance of the <see cref="SiteDomainHelperResolver"/> class with an <see cref="ISiteDomainHelper"/> implementation.
+		/// </summary>
+        /// <param name="helper">The <see cref="ISiteDomainHelper"/> implementation.</param>
+        internal SiteDomainHelperResolver(ISiteDomainHelper helper)
+			: base(helper)
+		{ }
+
+
+		/// <summary>
+        /// Can be used by developers at runtime to set their IDomainHelper at app startup
+		/// </summary>
+        /// <param name="helper"></param>
+		public void SetHelper(ISiteDomainHelper helper)
+		{
+			Value = helper;
+		}
+
+		/// <summary>
+        /// Gets or sets the <see cref="ISiteDomainHelper"/> implementation.
+		/// </summary>
+        public ISiteDomainHelper Helper
+		{
+			get { return Value; }
+		}
+	}
+}