Protocol Buffer runtime library and 'protoc' plugin

lib/protobuf/plugin/ProtocException.dart

Index: lib/protobuf/plugin/ProtocException.dart
diff --git a/lib/protobuf/plugin/ProtocException.dart b/lib/protobuf/plugin/ProtocException.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2b514c6a6e19522b63fe6efba007f1a54c00aa8b
--- /dev/null
+++ b/lib/protobuf/plugin/ProtocException.dart
@@ -0,0 +1,24 @@
+// 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 ProtocException {
+  String message;
+
+  ProtocException(this.message) { }
+
+  String toString() => message;
+}
+
+class InvalidDefaultValue extends ProtocException {
+  InvalidDefaultValue(String message) :
+      super("InvalidDefaultValue: $message") { }
+
+  static InvalidDefaultValue invalidDoubleValue(String fieldName,
+      String invalidValue) {
+    return new InvalidDefaultValue(
+        "Protoc found invalid default value ($invalidValue) for the "
+            "'double' field ${fieldName}");
+  }
+}
+