src/google/protobuf/compiler/cpp/cpp_service.cc - third_party/github/protocolbuffers/protobuf - Git at Google

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // 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.

 // Author: kenton@google.com (Kenton Varda)
 //  Based on original Protocol Buffers design by
 //  Sanjay Ghemawat, Jeff Dean, and others.

 #include <google/protobuf/compiler/cpp/cpp_service.h>
 #include <google/protobuf/compiler/cpp/cpp_helpers.h>
 #include <google/protobuf/io/printer.h>
 #include <google/protobuf/stubs/strutil.h>

 namespace google {
 namespace protobuf {
 namespace compiler {
 namespace cpp {

 ServiceGenerator::ServiceGenerator(const ServiceDescriptor* descriptor,
                                    const Options& options)
   : descriptor_(descriptor) {
   vars_["classname"] = descriptor_->name();
   vars_["full_name"] = descriptor_->full_name();
   if (options.dllexport_decl.empty()) {
     vars_["dllexport"] = "";
   } else {
     vars_["dllexport"] = options.dllexport_decl + " ";
   }
 }

 ServiceGenerator::~ServiceGenerator() {}

 void ServiceGenerator::GenerateDeclarations(io::Printer* printer) {
   // Forward-declare the stub type.
   printer->Print(vars_,
     "class $classname$_Stub;\n"
     "\n");

   GenerateInterface(printer);
   GenerateStubDefinition(printer);
 }

 void ServiceGenerator::GenerateInterface(io::Printer* printer) {
   printer->Print(vars_,
     "class $dllexport$$classname$ : public ::google::protobuf::Service {\n"
     " protected:\n"
     "  // This class should be treated as an abstract interface.\n"
     "  inline $classname$() {};\n"
     " public:\n"
     "  virtual ~$classname$();\n");
   printer->Indent();

   printer->Print(vars_,
     "\n"
     "typedef $classname$_Stub Stub;\n"
     "\n"
     "static const ::google::protobuf::ServiceDescriptor* descriptor();\n"
     "\n");

   GenerateMethodSignatures(VIRTUAL, printer);

   printer->Print(
     "\n"
     "// implements Service ----------------------------------------------\n"
     "\n"
     "const ::google::protobuf::ServiceDescriptor* GetDescriptor();\n"
     "void CallMethod(const ::google::protobuf::MethodDescriptor* method,\n"
     "                ::google::protobuf::RpcController* controller,\n"
     "                const ::google::protobuf::Message* request,\n"
     "                ::google::protobuf::Message* response,\n"
     "                ::google::protobuf::Closure* done);\n"
     "const ::google::protobuf::Message& GetRequestPrototype(\n"
     "  const ::google::protobuf::MethodDescriptor* method) const;\n"
     "const ::google::protobuf::Message& GetResponsePrototype(\n"
     "  const ::google::protobuf::MethodDescriptor* method) const;\n");

   printer->Outdent();
   printer->Print(vars_,
     "\n"
     " private:\n"
     "  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS($classname$);\n"
     "};\n"
     "\n");
 }

 void ServiceGenerator::GenerateStubDefinition(io::Printer* printer) {
   printer->Print(vars_,
     "class $dllexport$$classname$_Stub : public $classname$ {\n"
     " public:\n");

   printer->Indent();

   printer->Print(vars_,
     "$classname$_Stub(::google::protobuf::RpcChannel* channel);\n"
     "$classname$_Stub(::google::protobuf::RpcChannel* channel,\n"
     "                 ::google::protobuf::Service::ChannelOwnership ownership);\n"
     "~$classname$_Stub();\n"
     "\n"
     "inline ::google::protobuf::RpcChannel* channel() { return channel_; }\n"
     "\n"
     "// implements $classname$ ------------------------------------------\n"
     "\n");

   GenerateMethodSignatures(NON_VIRTUAL, printer);

   printer->Outdent();
   printer->Print(vars_,
     " private:\n"
     "  ::google::protobuf::RpcChannel* channel_;\n"
     "  bool owns_channel_;\n"
     "  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS($classname$_Stub);\n"
     "};\n"
     "\n");
 }

 void ServiceGenerator::GenerateMethodSignatures(
     VirtualOrNon virtual_or_non, io::Printer* printer) {
   for (int i = 0; i < descriptor_->method_count(); i++) {
     const MethodDescriptor* method = descriptor_->method(i);
     map<string, string> sub_vars;
     sub_vars["name"] = method->name();
     sub_vars["input_type"] = ClassName(method->input_type(), true);
     sub_vars["output_type"] = ClassName(method->output_type(), true);
     sub_vars["virtual"] = virtual_or_non == VIRTUAL ? "virtual " : "";

     printer->Print(sub_vars,
       "$virtual$void $name$(::google::protobuf::RpcController* controller,\n"
       "                     const $input_type$* request,\n"
       "                     $output_type$* response,\n"
       "                     ::google::protobuf::Closure* done);\n");
   }
 }

 // ===================================================================

 void ServiceGenerator::GenerateDescriptorInitializer(
     io::Printer* printer, int index) {
   map<string, string> vars;
   vars["classname"] = descriptor_->name();
   vars["index"] = SimpleItoa(index);

   printer->Print(vars,
     "$classname$_descriptor_ = file->service($index$);\n");
 }

 // ===================================================================

 void ServiceGenerator::GenerateImplementation(io::Printer* printer) {
   printer->Print(vars_,
     "$classname$::~$classname$() {}\n"
     "\n"
     "const ::google::protobuf::ServiceDescriptor* $classname$::descriptor() {\n"
     "  protobuf_AssignDescriptorsOnce();\n"
     "  return $classname$_descriptor_;\n"
     "}\n"
     "\n"
     "const ::google::protobuf::ServiceDescriptor* $classname$::GetDescriptor() {\n"
     "  protobuf_AssignDescriptorsOnce();\n"
     "  return $classname$_descriptor_;\n"
     "}\n"
     "\n");

   // Generate methods of the interface.
   GenerateNotImplementedMethods(printer);
   GenerateCallMethod(printer);
   GenerateGetPrototype(REQUEST, printer);
   GenerateGetPrototype(RESPONSE, printer);

   // Generate stub implementation.
   printer->Print(vars_,
     "$classname$_Stub::$classname$_Stub(::google::protobuf::RpcChannel* channel)\n"
     "  : channel_(channel), owns_channel_(false) {}\n"
     "$classname$_Stub::$classname$_Stub(\n"
     "    ::google::protobuf::RpcChannel* channel,\n"
     "    ::google::protobuf::Service::ChannelOwnership ownership)\n"
     "  : channel_(channel),\n"
     "    owns_channel_(ownership == ::google::protobuf::Service::STUB_OWNS_CHANNEL) {}\n"
     "$classname$_Stub::~$classname$_Stub() {\n"
     "  if (owns_channel_) delete channel_;\n"
     "}\n"
     "\n");

   GenerateStubMethods(printer);
 }

 void ServiceGenerator::GenerateNotImplementedMethods(io::Printer* printer) {
   for (int i = 0; i < descriptor_->method_count(); i++) {
     const MethodDescriptor* method = descriptor_->method(i);
     map<string, string> sub_vars;
     sub_vars["classname"] = descriptor_->name();
     sub_vars["name"] = method->name();
     sub_vars["index"] = SimpleItoa(i);
     sub_vars["input_type"] = ClassName(method->input_type(), true);
     sub_vars["output_type"] = ClassName(method->output_type(), true);

     printer->Print(sub_vars,
       "void $classname$::$name$(::google::protobuf::RpcController* controller,\n"
       "                         const $input_type$*,\n"
       "                         $output_type$*,\n"
       "                         ::google::protobuf::Closure* done) {\n"
       "  controller->SetFailed(\"Method $name$() not implemented.\");\n"
       "  done->Run();\n"
       "}\n"
       "\n");
   }
 }

 void ServiceGenerator::GenerateCallMethod(io::Printer* printer) {
   printer->Print(vars_,
     "void $classname$::CallMethod(const ::google::protobuf::MethodDescriptor* method,\n"
     "                             ::google::protobuf::RpcController* controller,\n"
     "                             const ::google::protobuf::Message* request,\n"
     "                             ::google::protobuf::Message* response,\n"
     "                             ::google::protobuf::Closure* done) {\n"
     "  GOOGLE_DCHECK_EQ(method->service(), $classname$_descriptor_);\n"
     "  switch(method->index()) {\n");

   for (int i = 0; i < descriptor_->method_count(); i++) {
     const MethodDescriptor* method = descriptor_->method(i);
     map<string, string> sub_vars;
     sub_vars["name"] = method->name();
     sub_vars["index"] = SimpleItoa(i);
     sub_vars["input_type"] = ClassName(method->input_type(), true);
     sub_vars["output_type"] = ClassName(method->output_type(), true);

     // Note:  down_cast does not work here because it only works on pointers,
     //   not references.
     printer->Print(sub_vars,
       "    case $index$:\n"
       "      $name$(controller,\n"
       "             ::google::protobuf::down_cast<const $input_type$*>(request),\n"
       "             ::google::protobuf::down_cast< $output_type$*>(response),\n"
       "             done);\n"
       "      break;\n");
   }

   printer->Print(vars_,
     "    default:\n"
     "      GOOGLE_LOG(FATAL) << \"Bad method index; this should never happen.\";\n"
     "      break;\n"
     "  }\n"
     "}\n"
     "\n");
 }

 void ServiceGenerator::GenerateGetPrototype(RequestOrResponse which,
                                             io::Printer* printer) {
   if (which == REQUEST) {
     printer->Print(vars_,
       "const ::google::protobuf::Message& $classname$::GetRequestPrototype(\n");
   } else {
     printer->Print(vars_,
       "const ::google::protobuf::Message& $classname$::GetResponsePrototype(\n");
   }

   printer->Print(vars_,
     "    const ::google::protobuf::MethodDescriptor* method) const {\n"
     "  GOOGLE_DCHECK_EQ(method->service(), descriptor());\n"
     "  switch(method->index()) {\n");

   for (int i = 0; i < descriptor_->method_count(); i++) {
     const MethodDescriptor* method = descriptor_->method(i);
     const Descriptor* type =
       (which == REQUEST) ? method->input_type() : method->output_type();

     map<string, string> sub_vars;
     sub_vars["index"] = SimpleItoa(i);
     sub_vars["type"] = ClassName(type, true);

     printer->Print(sub_vars,
       "    case $index$:\n"
       "      return $type$::default_instance();\n");
   }

   printer->Print(vars_,
     "    default:\n"
     "      GOOGLE_LOG(FATAL) << \"Bad method index; this should never happen.\";\n"
     "      return *static_cast< ::google::protobuf::Message*>(NULL);\n"
     "  }\n"
     "}\n"
     "\n");
 }

 void ServiceGenerator::GenerateStubMethods(io::Printer* printer) {
   for (int i = 0; i < descriptor_->method_count(); i++) {
     const MethodDescriptor* method = descriptor_->method(i);
     map<string, string> sub_vars;
     sub_vars["classname"] = descriptor_->name();
     sub_vars["name"] = method->name();
     sub_vars["index"] = SimpleItoa(i);
     sub_vars["input_type"] = ClassName(method->input_type(), true);
     sub_vars["output_type"] = ClassName(method->output_type(), true);

     printer->Print(sub_vars,
       "void $classname$_Stub::$name$(::google::protobuf::RpcController* controller,\n"
       "                              const $input_type$* request,\n"
       "                              $output_type$* response,\n"
       "                              ::google::protobuf::Closure* done) {\n"
       "  channel_->CallMethod(descriptor()->method($index$),\n"
       "                       controller, request, response, done);\n"
       "}\n");
   }
 }

 }  // namespace cpp
 }  // namespace compiler
 }  // namespace protobuf
 }  // namespace google
	// Protocol Buffers - Google's data interchange format
	// Copyright 2008 Google Inc. All rights reserved.
	// https://developers.google.com/protocol-buffers/
	//
	// 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.

	// Author: kenton@google.com (Kenton Varda)
	// Based on original Protocol Buffers design by
	// Sanjay Ghemawat, Jeff Dean, and others.

	#include <google/protobuf/compiler/cpp/cpp_service.h>
	#include <google/protobuf/compiler/cpp/cpp_helpers.h>
	#include <google/protobuf/io/printer.h>
	#include <google/protobuf/stubs/strutil.h>

	namespace google {
	namespace protobuf {
	namespace compiler {
	namespace cpp {

	ServiceGenerator::ServiceGenerator(const ServiceDescriptor* descriptor,
	const Options& options)
	: descriptor_(descriptor) {
	vars_["classname"] = descriptor_->name();
	vars_["full_name"] = descriptor_->full_name();
	if (options.dllexport_decl.empty()) {
	vars_["dllexport"] = "";
	} else {
	vars_["dllexport"] = options.dllexport_decl + " ";
	}
	}

	ServiceGenerator::~ServiceGenerator() {}

	void ServiceGenerator::GenerateDeclarations(io::Printer* printer) {
	// Forward-declare the stub type.
	printer->Print(vars_,
	"class $classname$_Stub;\n"
	"\n");

	GenerateInterface(printer);
	GenerateStubDefinition(printer);
	}

	void ServiceGenerator::GenerateInterface(io::Printer* printer) {
	printer->Print(vars_,
	"class $dllexport$$classname$ : public ::google::protobuf::Service {\n"
	" protected:\n"
	" // This class should be treated as an abstract interface.\n"
	" inline $classname$() {};\n"
	" public:\n"
	" virtual ~$classname$();\n");
	printer->Indent();

	printer->Print(vars_,
	"\n"
	"typedef $classname$_Stub Stub;\n"
	"\n"
	"static const ::google::protobuf::ServiceDescriptor* descriptor();\n"
	"\n");

	GenerateMethodSignatures(VIRTUAL, printer);

	printer->Print(
	"\n"
	"// implements Service ----------------------------------------------\n"
	"\n"
	"const ::google::protobuf::ServiceDescriptor* GetDescriptor();\n"
	"void CallMethod(const ::google::protobuf::MethodDescriptor* method,\n"
	" ::google::protobuf::RpcController* controller,\n"
	" const ::google::protobuf::Message* request,\n"
	" ::google::protobuf::Message* response,\n"
	" ::google::protobuf::Closure* done);\n"
	"const ::google::protobuf::Message& GetRequestPrototype(\n"
	" const ::google::protobuf::MethodDescriptor* method) const;\n"
	"const ::google::protobuf::Message& GetResponsePrototype(\n"
	" const ::google::protobuf::MethodDescriptor* method) const;\n");

	printer->Outdent();
	printer->Print(vars_,
	"\n"
	" private:\n"
	" GOOGLE_DISALLOW_EVIL_CONSTRUCTORS($classname$);\n"
	"};\n"
	"\n");
	}

	void ServiceGenerator::GenerateStubDefinition(io::Printer* printer) {
	printer->Print(vars_,
	"class $dllexport$$classname$_Stub : public $classname$ {\n"
	" public:\n");

	printer->Indent();

	printer->Print(vars_,
	"$classname$_Stub(::google::protobuf::RpcChannel* channel);\n"
	"$classname$_Stub(::google::protobuf::RpcChannel* channel,\n"
	" ::google::protobuf::Service::ChannelOwnership ownership);\n"
	"~$classname$_Stub();\n"
	"\n"
	"inline ::google::protobuf::RpcChannel* channel() { return channel_; }\n"
	"\n"
	"// implements $classname$ ------------------------------------------\n"
	"\n");

	GenerateMethodSignatures(NON_VIRTUAL, printer);

	printer->Outdent();
	printer->Print(vars_,
	" private:\n"
	" ::google::protobuf::RpcChannel* channel_;\n"
	" bool owns_channel_;\n"
	" GOOGLE_DISALLOW_EVIL_CONSTRUCTORS($classname$_Stub);\n"
	"};\n"
	"\n");
	}

	void ServiceGenerator::GenerateMethodSignatures(
	VirtualOrNon virtual_or_non, io::Printer* printer) {
	for (int i = 0; i < descriptor_->method_count(); i++) {
	const MethodDescriptor* method = descriptor_->method(i);
	map<string, string> sub_vars;
	sub_vars["name"] = method->name();
	sub_vars["input_type"] = ClassName(method->input_type(), true);
	sub_vars["output_type"] = ClassName(method->output_type(), true);
	sub_vars["virtual"] = virtual_or_non == VIRTUAL ? "virtual " : "";

	printer->Print(sub_vars,
	"$virtual$void $name$(::google::protobuf::RpcController* controller,\n"
	" const $input_type$* request,\n"
	" $output_type$* response,\n"
	" ::google::protobuf::Closure* done);\n");
	}
	}

	// ===================================================================

	void ServiceGenerator::GenerateDescriptorInitializer(
	io::Printer* printer, int index) {
	map<string, string> vars;
	vars["classname"] = descriptor_->name();
	vars["index"] = SimpleItoa(index);

	printer->Print(vars,
	"$classname$_descriptor_ = file->service($index$);\n");
	}

	// ===================================================================

	void ServiceGenerator::GenerateImplementation(io::Printer* printer) {
	printer->Print(vars_,
	"$classname$::~$classname$() {}\n"
	"\n"
	"const ::google::protobuf::ServiceDescriptor* $classname$::descriptor() {\n"
	" protobuf_AssignDescriptorsOnce();\n"
	" return $classname$_descriptor_;\n"
	"}\n"
	"\n"
	"const ::google::protobuf::ServiceDescriptor* $classname$::GetDescriptor() {\n"
	" protobuf_AssignDescriptorsOnce();\n"
	" return $classname$_descriptor_;\n"
	"}\n"
	"\n");

	// Generate methods of the interface.
	GenerateNotImplementedMethods(printer);
	GenerateCallMethod(printer);
	GenerateGetPrototype(REQUEST, printer);
	GenerateGetPrototype(RESPONSE, printer);

	// Generate stub implementation.
	printer->Print(vars_,
	"$classname$_Stub::$classname$_Stub(::google::protobuf::RpcChannel* channel)\n"
	" : channel_(channel), owns_channel_(false) {}\n"
	"$classname$_Stub::$classname$_Stub(\n"
	" ::google::protobuf::RpcChannel* channel,\n"
	" ::google::protobuf::Service::ChannelOwnership ownership)\n"
	" : channel_(channel),\n"
	" owns_channel_(ownership == ::google::protobuf::Service::STUB_OWNS_CHANNEL) {}\n"
	"$classname$_Stub::~$classname$_Stub() {\n"
	" if (owns_channel_) delete channel_;\n"
	"}\n"
	"\n");

	GenerateStubMethods(printer);
	}

	void ServiceGenerator::GenerateNotImplementedMethods(io::Printer* printer) {
	for (int i = 0; i < descriptor_->method_count(); i++) {
	const MethodDescriptor* method = descriptor_->method(i);
	map<string, string> sub_vars;
	sub_vars["classname"] = descriptor_->name();
	sub_vars["name"] = method->name();
	sub_vars["index"] = SimpleItoa(i);
	sub_vars["input_type"] = ClassName(method->input_type(), true);
	sub_vars["output_type"] = ClassName(method->output_type(), true);

	printer->Print(sub_vars,
	"void $classname$::$name$(::google::protobuf::RpcController* controller,\n"
	" const $input_type$*,\n"
	" $output_type$*,\n"
	" ::google::protobuf::Closure* done) {\n"
	" controller->SetFailed(\"Method $name$() not implemented.\");\n"
	" done->Run();\n"
	"}\n"
	"\n");
	}
	}

	void ServiceGenerator::GenerateCallMethod(io::Printer* printer) {
	printer->Print(vars_,
	"void $classname$::CallMethod(const ::google::protobuf::MethodDescriptor* method,\n"
	" ::google::protobuf::RpcController* controller,\n"
	" const ::google::protobuf::Message* request,\n"
	" ::google::protobuf::Message* response,\n"
	" ::google::protobuf::Closure* done) {\n"
	" GOOGLE_DCHECK_EQ(method->service(), $classname$_descriptor_);\n"
	" switch(method->index()) {\n");

	for (int i = 0; i < descriptor_->method_count(); i++) {
	const MethodDescriptor* method = descriptor_->method(i);
	map<string, string> sub_vars;
	sub_vars["name"] = method->name();
	sub_vars["index"] = SimpleItoa(i);
	sub_vars["input_type"] = ClassName(method->input_type(), true);
	sub_vars["output_type"] = ClassName(method->output_type(), true);

	// Note: down_cast does not work here because it only works on pointers,
	// not references.
	printer->Print(sub_vars,
	" case $index$:\n"
	" $name$(controller,\n"
	" ::google::protobuf::down_cast<const $input_type$*>(request),\n"
	" ::google::protobuf::down_cast< $output_type$*>(response),\n"
	" done);\n"
	" break;\n");
	}

	printer->Print(vars_,
	" default:\n"
	" GOOGLE_LOG(FATAL) << \"Bad method index; this should never happen.\";\n"
	" break;\n"
	" }\n"
	"}\n"
	"\n");
	}

	void ServiceGenerator::GenerateGetPrototype(RequestOrResponse which,
	io::Printer* printer) {
	if (which == REQUEST) {
	printer->Print(vars_,
	"const ::google::protobuf::Message& $classname$::GetRequestPrototype(\n");
	} else {
	printer->Print(vars_,
	"const ::google::protobuf::Message& $classname$::GetResponsePrototype(\n");
	}

	printer->Print(vars_,
	" const ::google::protobuf::MethodDescriptor* method) const {\n"
	" GOOGLE_DCHECK_EQ(method->service(), descriptor());\n"
	" switch(method->index()) {\n");

	for (int i = 0; i < descriptor_->method_count(); i++) {
	const MethodDescriptor* method = descriptor_->method(i);
	const Descriptor* type =
	(which == REQUEST) ? method->input_type() : method->output_type();

	map<string, string> sub_vars;
	sub_vars["index"] = SimpleItoa(i);
	sub_vars["type"] = ClassName(type, true);

	printer->Print(sub_vars,
	" case $index$:\n"
	" return $type$::default_instance();\n");
	}

	printer->Print(vars_,
	" default:\n"
	" GOOGLE_LOG(FATAL) << \"Bad method index; this should never happen.\";\n"
	" return static_cast< ::google::protobuf::Message>(NULL);\n"
	" }\n"
	"}\n"
	"\n");
	}

	void ServiceGenerator::GenerateStubMethods(io::Printer* printer) {
	for (int i = 0; i < descriptor_->method_count(); i++) {
	const MethodDescriptor* method = descriptor_->method(i);
	map<string, string> sub_vars;
	sub_vars["classname"] = descriptor_->name();
	sub_vars["name"] = method->name();
	sub_vars["index"] = SimpleItoa(i);
	sub_vars["input_type"] = ClassName(method->input_type(), true);
	sub_vars["output_type"] = ClassName(method->output_type(), true);

	printer->Print(sub_vars,
	"void $classname$_Stub::$name$(::google::protobuf::RpcController* controller,\n"
	" const $input_type$* request,\n"
	" $output_type$* response,\n"
	" ::google::protobuf::Closure* done) {\n"
	" channel_->CallMethod(descriptor()->method($index$),\n"
	" controller, request, response, done);\n"
	"}\n");
	}
	}

	} // namespace cpp
	} // namespace compiler
	} // namespace protobuf
	} // namespace google