1 files changed, 70 insertions, 1 deletions
diff --git a/src/ProtocolBuffers/EnumLite.cs b/src/ProtocolBuffers/EnumLite.cs
index 0c6c9afb..92187b38 100644
--- a/src/ProtocolBuffers/EnumLite.cs
+++ b/src/ProtocolBuffers/EnumLite.cs
@@ -1,5 +1,40 @@
-using System;
+#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.Generic;
+using System.Globalization;
 using System.Text;
 
 namespace Google.ProtocolBuffers {
@@ -28,4 +63,38 @@ namespace Google.ProtocolBuffers {
   public interface IEnumLiteMap {
     bool IsValidValue(IEnumLite value);
   }
+
+  public class EnumLiteMap<TEnum> : IEnumLiteMap<IEnumLite>
+    where TEnum : struct, IComparable, IFormattable, IConvertible {
+    
+    struct EnumValue : IEnumLite, IComparable<IEnumLite> {
+      int _value;
+      public EnumValue(int value) {
+        _value = value;
+      }
+      int IEnumLite.Number {
+        get { return _value; }
+      }
+      int IComparable<IEnumLite>.CompareTo(IEnumLite other) {
+        return _value.CompareTo(other.Number);
+      }
+    }
+
+    private readonly SortedList<int, IEnumLite> items;
+
+    public EnumLiteMap() {
+      items = new SortedList<int, IEnumLite>();
+      foreach (TEnum evalue in Enum.GetValues(typeof(TEnum)))
+        items.Add(evalue.ToInt32(CultureInfo.InvariantCulture), new EnumValue(evalue.ToInt32(CultureInfo.InvariantCulture)));
+    }
+
+    IEnumLite IEnumLiteMap<IEnumLite>.FindValueByNumber(int number) {
+      IEnumLite val;
+      return items.TryGetValue(number, out val) ? val : null;
+    }
+
+    bool IEnumLiteMap.IsValidValue(IEnumLite value) {
+      return items.ContainsKey(value.Number);
+    }
+  }
 }