1 files changed, 70 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.Core/Configuration/HostNameOrRegexCollection.cs b/src/DotNetOpenAuth.Core/Configuration/HostNameOrRegexCollection.cs
new file mode 100644
index 0000000..c7d963b
--- /dev/null
+++ b/src/DotNetOpenAuth.Core/Configuration/HostNameOrRegexCollection.cs
@@ -0,0 +1,70 @@
+//-----------------------------------------------------------------------
+// <copyright file="HostNameOrRegexCollection.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.Configuration {
+	using System.Collections.Generic;
+	using System.Configuration;
+	using System.Diagnostics.Contracts;
+	using System.Text.RegularExpressions;
+
+	/// <summary>
+	/// Represents a collection of child elements that describe host names either as literal host names or regex patterns.
+	/// </summary>
+	[ContractVerification(true)]
+	internal class HostNameOrRegexCollection : ConfigurationElementCollection {
+		/// <summary>
+		/// Initializes a new instance of the <see cref="HostNameOrRegexCollection"/> class.
+		/// </summary>
+		public HostNameOrRegexCollection() {
+		}
+
+		/// <summary>
+		/// Gets all the members of the collection assuming they are all literal host names.
+		/// </summary>
+		internal IEnumerable<string> KeysAsStrings {
+			get {
+				foreach (HostNameElement element in this) {
+					yield return element.Name;
+				}
+			}
+		}
+
+		/// <summary>
+		/// Gets all the members of the collection assuming they are all host names regex patterns.
+		/// </summary>
+		internal IEnumerable<Regex> KeysAsRegexs {
+			get {
+				foreach (HostNameElement element in this) {
+					if (element.Name != null) {
+						yield return new Regex(element.Name);
+					}
+				}
+			}
+		}
+
+		/// <summary>
+		/// Creates a new child host name element.
+		/// </summary>
+		/// <returns>
+		/// A new <see cref="T:System.Configuration.ConfigurationElement"/>.
+		/// </returns>
+		protected override ConfigurationElement CreateNewElement() {
+			return new HostNameElement();
+		}
+
+		/// <summary>
+		/// Gets the element key for a specified configuration element.
+		/// </summary>
+		/// <param name="element">The <see cref="T:System.Configuration.ConfigurationElement"/> to return the key for.</param>
+		/// <returns>
+		/// An <see cref="T:System.Object"/> that acts as the key for the specified <see cref="T:System.Configuration.ConfigurationElement"/>.
+		/// </returns>
+		protected override object GetElementKey(ConfigurationElement element) {
+			Contract.Assume(element != null); // this should be Contract.Requires in base class.
+			return ((HostNameElement)element).Name ?? string.Empty;
+		}
+	}
+}