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/*
*
* Copyright 2015, 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.
*
*/
#include <cctype>
#include <string>
#include <map>
#include <vector>
#include "src/compiler/ruby_generator.h"
#include "src/compiler/ruby_generator_helpers-inl.h"
#include "src/compiler/ruby_generator_map-inl.h"
#include "src/compiler/ruby_generator_string-inl.h"
#include <google/protobuf/io/printer.h>
#include <google/protobuf/io/zero_copy_stream_impl_lite.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/descriptor.h>
using google::protobuf::FileDescriptor;
using google::protobuf::ServiceDescriptor;
using google::protobuf::MethodDescriptor;
using google::protobuf::io::Printer;
using google::protobuf::io::StringOutputStream;
using std::map;
using std::vector;
namespace grpc_ruby_generator {
namespace {
// Prints out the method using the ruby gRPC DSL.
void PrintMethod(const MethodDescriptor *method, const std::string &package,
Printer *out) {
std::string input_type = RubyTypeOf(method->input_type()->name(), package);
if (method->client_streaming()) {
input_type = "stream(" + input_type + ")";
}
std::string output_type = RubyTypeOf(method->output_type()->name(), package);
if (method->server_streaming()) {
output_type = "stream(" + output_type + ")";
}
std::map<std::string, std::string> method_vars =
ListToDict({"mth.name", method->name(), "input.type", input_type,
"output.type", output_type, });
out->Print(method_vars, "rpc :$mth.name$, $input.type$, $output.type$\n");
}
// Prints out the service using the ruby gRPC DSL.
void PrintService(const ServiceDescriptor *service, const std::string &package,
Printer *out) {
if (service->method_count() == 0) {
return;
}
// Begin the service module
std::map<std::string, std::string> module_vars =
ListToDict({"module.name", CapitalizeFirst(service->name()), });
out->Print(module_vars, "module $module.name$\n");
out->Indent();
// TODO(temiola): add documentation
std::string doc = "TODO: add proto service documentation here";
std::map<std::string, std::string> template_vars =
ListToDict({"Documentation", doc, });
out->Print("\n");
out->Print(template_vars, "# $Documentation$\n");
out->Print("class Service\n");
// Write the indented class body.
out->Indent();
out->Print("\n");
out->Print("include GRPC::GenericService\n");
out->Print("\n");
out->Print("self.marshal_class_method = :encode\n");
out->Print("self.unmarshal_class_method = :decode\n");
std::map<std::string, std::string> pkg_vars =
ListToDict({"service.name", service->name(), "pkg.name", package, });
out->Print(pkg_vars, "self.service_name = '$pkg.name$.$service.name$'\n");
out->Print("\n");
for (int i = 0; i < service->method_count(); ++i) {
PrintMethod(service->method(i), package, out);
}
out->Outdent();
out->Print("end\n");
out->Print("\n");
out->Print("Stub = Service.rpc_stub_class\n");
// End the service module
out->Outdent();
out->Print("end\n");
}
} // namespace
std::string GetServices(const FileDescriptor *file) {
std::string output;
StringOutputStream output_stream(&output);
Printer out(&output_stream, '$');
// Don't write out any output if there no services, to avoid empty service
// files being generated for proto files that don't declare any.
if (file->service_count() == 0) {
return output;
}
// Write out a file header.
std::map<std::string, std::string> header_comment_vars = ListToDict(
{"file.name", file->name(), "file.package", file->package(), });
out.Print("# Generated by the protocol buffer compiler. DO NOT EDIT!\n");
out.Print(header_comment_vars,
"# Source: $file.name$ for package '$file.package$'\n");
out.Print("\n");
out.Print("require 'grpc'\n");
// Write out require statemment to import the separately generated file
// that defines the messages used by the service. This is generated by the
// main ruby plugin.
std::map<std::string, std::string> dep_vars =
ListToDict({"dep.name", MessagesRequireName(file), });
out.Print(dep_vars, "require '$dep.name$'\n");
// Write out services within the modules
out.Print("\n");
std::vector<std::string> modules = Split(file->package(), '.');
for (size_t i = 0; i < modules.size(); ++i) {
std::map<std::string, std::string> module_vars =
ListToDict({"module.name", CapitalizeFirst(modules[i]), });
out.Print(module_vars, "module $module.name$\n");
out.Indent();
}
for (int i = 0; i < file->service_count(); ++i) {
auto service = file->service(i);
PrintService(service, file->package(), &out);
}
for (size_t i = 0; i < modules.size(); ++i) {
out.Outdent();
out.Print("end\n");
}
return output;
}
} // namespace grpc_ruby_generator
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