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/*
* Copyright 2019 The gRPC Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Generates Java gRPC service interface out of Protobuf IDL.
//
// This is a Proto2 compiler plugin. See net/proto2/compiler/proto/plugin.proto
// and net/proto2/compiler/public/plugin.h for more information on plugins.
#include <memory>
#include "java_generator.h"
#include <google/protobuf/compiler/code_generator.h>
#include <google/protobuf/compiler/plugin.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/io/zero_copy_stream.h>
namespace protobuf = google::protobuf;
static std::string JavaPackageToDir(const std::string& package_name) {
std::string package_dir = package_name;
for (size_t i = 0; i < package_dir.size(); ++i) {
if (package_dir[i] == '.') {
package_dir[i] = '/';
}
}
if (!package_dir.empty()) package_dir += "/";
return package_dir;
}
class JavaGrpcGenerator : public protobuf::compiler::CodeGenerator {
public:
JavaGrpcGenerator() {}
virtual ~JavaGrpcGenerator() {}
uint64_t GetSupportedFeatures() const override {
return FEATURE_PROTO3_OPTIONAL;
}
virtual bool Generate(const protobuf::FileDescriptor* file,
const std::string& parameter,
protobuf::compiler::GeneratorContext* context,
std::string* error) const override {
std::vector<std::pair<std::string, std::string> > options;
protobuf::compiler::ParseGeneratorParameter(parameter, &options);
java_grpc_generator::ProtoFlavor flavor =
java_grpc_generator::ProtoFlavor::NORMAL;
bool disable_version = false;
for (size_t i = 0; i < options.size(); i++) {
if (options[i].first == "lite") {
flavor = java_grpc_generator::ProtoFlavor::LITE;
} else if (options[i].first == "noversion") {
disable_version = true;
}
}
std::string package_name = java_grpc_generator::ServiceJavaPackage(file);
std::string package_filename = JavaPackageToDir(package_name);
for (int i = 0; i < file->service_count(); ++i) {
const protobuf::ServiceDescriptor* service = file->service(i);
std::string filename = package_filename
+ java_grpc_generator::ServiceClassName(service) + ".java";
std::unique_ptr<protobuf::io::ZeroCopyOutputStream> output(
context->Open(filename));
java_grpc_generator::GenerateService(
service, output.get(), flavor, disable_version);
}
return true;
}
};
int main(int argc, char* argv[]) {
JavaGrpcGenerator generator;
return protobuf::compiler::PluginMain(argc, argv, &generator);
}
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