Protocol Buffer runtime library and 'protoc' plugin

lib/protobuf/runtime/ProtobufEnum.dart

Index: lib/protobuf/runtime/ProtobufEnum.dart
diff --git a/lib/protobuf/runtime/ProtobufEnum.dart b/lib/protobuf/runtime/ProtobufEnum.dart
new file mode 100644
index 0000000000000000000000000000000000000000..5edf066d914f37d24685dcef36d3e8c149b5962b
--- /dev/null
+++ b/lib/protobuf/runtime/ProtobufEnum.dart
@@ -0,0 +1,23 @@
+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+class ProtobufEnum {
+  final int _index;
+  final int _value;
+  final String _name;
+
+  const ProtobufEnum(this._index, this._value, this._name);
+
+  static Map<int, ProtobufEnum> initByValue(List<ProtobufEnum> byIndex) {
+    Map<int, ProtobufEnum> byValue = new Map<int, Dynamic>();
+    for (ProtobufEnum v in byIndex) {
+      byValue[v.value] = v;
+    }
+    return byValue;
+  }
+
+  int hashCode() => _value;
+  String get name() => _name;
+  int get value() => _value;
+  int get index() => _index;
+}