1 files changed, 88 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers/GeneratedRepeatExtension.cs b/csharp/src/ProtocolBuffers/GeneratedRepeatExtension.cs
new file mode 100644
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+++ b/csharp/src/ProtocolBuffers/GeneratedRepeatExtension.cs
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+#region Copyright notice and license
+
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using Google.ProtocolBuffers.Descriptors;
+
+namespace Google.ProtocolBuffers
+{
+    /// <summary>
+    /// Class used to represent repeat extensions in generated classes.
+    /// </summary>
+    public sealed class GeneratedRepeatExtension<TExtensionElement> : GeneratedExtensionBase<IList<TExtensionElement>>
+    {
+        private GeneratedRepeatExtension(FieldDescriptor field) : base(field, typeof(TExtensionElement))
+        {
+        }
+
+        public static GeneratedExtensionBase<IList<TExtensionElement>> CreateInstance(FieldDescriptor descriptor)
+        {
+            if (!descriptor.IsRepeated)
+            {
+                throw new ArgumentException("Must call GeneratedRepeatExtension.CreateInstance() for repeated types.");
+            }
+            return new GeneratedRepeatExtension<TExtensionElement>(descriptor);
+        }
+
+        /// <summary>
+        /// Converts the list to the right type.
+        /// TODO(jonskeet): Check where this is used, and whether we need to convert
+        /// for primitive types.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public override object FromReflectionType(object value)
+        {
+            if (Descriptor.MappedType == MappedType.Message ||
+                Descriptor.MappedType == MappedType.Enum)
+            {
+                // Must convert the whole list.
+                List<TExtensionElement> result = new List<TExtensionElement>();
+                foreach (object element in (IEnumerable) value)
+                {
+                    result.Add((TExtensionElement) SingularFromReflectionType(element));
+                }
+                return result;
+            }
+            else
+            {
+                return value;
+            }
+        }
+    }
+}
+\ No newline at end of file