Protocol Buffer runtime library and 'protoc' plugin

lib/protobuf/runtime/DynamicGeneratedMessage.dart

Index: lib/protobuf/runtime/DynamicGeneratedMessage.dart
diff --git a/lib/protobuf/runtime/DynamicGeneratedMessage.dart b/lib/protobuf/runtime/DynamicGeneratedMessage.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ff245261838ce4a0df31c81b43d7af00d21697ba
--- /dev/null
+++ b/lib/protobuf/runtime/DynamicGeneratedMessage.dart
@@ -0,0 +1,29 @@
+// Copyright (c) 2012, 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.
+
+/**
+ * Provides an implementation of 'noSuchMethod' that may be used as a
+ * substitute for fixed getter and setter methods.
+ */
+class DynamicGeneratedMessage extends GeneratedMessage {
+
+  /**
+   * Implement getXxx and hasXxx methods dynamically.
+   */
+  Dynamic noSuchMethod(String name, List args) {
+    if (name.startsWith("get:")) {
+      int tagNumber = getTagNumber(name.substring(4));
+      if (tagNumber != null) {
+        return getField(tagNumber);
+      }
+    } else if (name.startsWith("has") && name.length > 3) {
+      String fieldName = "${name[3].toLowerCase()}${name.substring(4)}";
+      int tagNumber = getTagNumber(fieldName);
+      if (tagNumber != null) {
+        return hasField(tagNumber);
+      }
+    }
+    throw "NoSuchMethod: $name";
+  }
+}