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+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPC_TEST_CPP_UTIL_PROTO_FILE_PARSER_H
+#define GRPC_TEST_CPP_UTIL_PROTO_FILE_PARSER_H
+
+#include <memory>
+
+#include <google/protobuf/compiler/importer.h>
+#include <google/protobuf/dynamic_message.h>
+
+#include "src/compiler/config.h"
+
+namespace grpc {
+namespace testing {
+class ErrorPrinter;
+
+// Find method and associated request/response types.
+class ProtoFileParser {
+ public:
+  // The given proto file_name will be searched in a source tree rooted from
+  // proto_path. The method could be a partial string such as Service.Method or
+  // even just Method. It will log an error if there is ambiguity.
+  ProtoFileParser(const grpc::string& proto_path, const grpc::string& file_name,
+                  const grpc::string& method);
+  ~ProtoFileParser();
+
+  grpc::string GetFullMethodName() const { return full_method_name_; }
+
+  grpc::string GetSerializedProto(const grpc::string& text_format_proto,
+                                  bool is_request);
+
+  grpc::string GetTextFormat(const grpc::string& serialized_proto,
+                             bool is_request);
+
+  bool HasError() const { return has_error_; }
+
+  void LogError(const grpc::string& error_msg);
+
+ private:
+  bool has_error_;
+  grpc::string request_text_;
+  grpc::string full_method_name_;
+  google::protobuf::compiler::DiskSourceTree source_tree_;
+  std::unique_ptr<ErrorPrinter> error_printer_;
+  std::unique_ptr<google::protobuf::compiler::Importer> importer_;
+  std::unique_ptr<google::protobuf::DynamicMessageFactory> dynamic_factory_;
+  std::unique_ptr<grpc::protobuf::Message> request_prototype_;
+  std::unique_ptr<grpc::protobuf::Message> response_prototype_;
+};
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPC_TEST_CPP_UTIL_PROTO_FILE_PARSER_H