Mojo: Report bindings validation errors via MojoNotifyBadMessage

mojo/public/cpp/bindings/lib/error.cc

Index: mojo/public/cpp/bindings/lib/error.cc
diff --git a/mojo/public/cpp/bindings/lib/error.cc b/mojo/public/cpp/bindings/lib/error.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6b309e0f74599e69d3de96c56bbc2a0ad8fe35c3
--- /dev/null
+++ b/mojo/public/cpp/bindings/lib/error.cc
@@ -0,0 +1,89 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/public/cpp/bindings/error.h"
+
+#include "base/strings/stringprintf.h"
+
+namespace mojo {
+
+Error::Error() : Error(Type::NONE) {}
+
+Error::Error(Error&& other) { *this = std::move(other); }
+
+Error::Error(Type type) : Error(type, "") {}
+
+Error::Error(Type type, const std::string& details)
+    : type_(type), details_(details) {
+}
+
+Error::~Error() {}
+
+Error& Error::operator=(Error&& other) {
+  type_ = other.type_;
+  details_ = std::move(other.details_);
+  other.message_.MoveTo(&message_);
+  return *this;
+}
+
+// static
+Error Error::ForBadMessage(const std::string& details, Message* message) {
+  Error error(Type::BAD_MESSAGE, details);
+  error.set_message(message);
+  return error;
+}
+
+// static
+Error Error::ForBadRequest(const std::string& interface_name,
+                           const std::string& method_name,
+                           Message* message) {
+  Error error(Type::BAD_MESSAGE,
+              base::StringPrintf("%s::%s", interface_name.c_str(),
+                                 method_name.c_str()));
+  error.set_message(message);
+  return error;
+}
+
+// static
+Error Error::ForBadResponse(const std::string& interface_name,
+                            const std::string& method_name,
+                            Message* message) {
+  Error error(Type::BAD_MESSAGE,
+              base::StringPrintf("%s::%s",
+                                 interface_name.c_str(), method_name.c_str()));
+  error.set_message(message);
+  return error;
+}
+
+// static
+Error Error::ForUnexpectedRequest(const std::string& interface_name,
+                                  Message* message) {
+  Error error(Type::BAD_MESSAGE,
+              base::StringPrintf("%s (Unexpected request %u)",
+                                 interface_name.c_str(), message->name()));
+  error.set_message(message);
+  return error;
+}
+
+// static
+Error Error::ForUnexpectedResponse(const std::string& interface_name,
+                                   Message* message) {
+  Error error(Type::BAD_MESSAGE,
+              base::StringPrintf("%s (Unexpected response %u)",
+                                 interface_name.c_str(), message->name()));
+  error.set_message(message);
+  return error;
+}
+
+//static
+Error Error::ForBadControlMessage(const std::string& interface_name,
+                                  Message* message) {
+  Error error(Type::BAD_MESSAGE,
+              base::StringPrintf("%s (control message ID %u)",
+                                 interface_name.c_str(), message->name()));
+  error.set_message(message);
+  return error;
+}
+
+}  // namespace mojo