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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.
*
*/
// Generates Objective C gRPC service interface out of Protobuf IDL.
#include <memory>
#include "src/compiler/config.h"
#include "src/compiler/objective_c_generator.h"
#include "src/compiler/objective_c_generator_helpers.h"
#include <google/protobuf/compiler/objectivec/objectivec_helpers.h>
using ::google::protobuf::compiler::objectivec::ProtobufLibraryFrameworkName;
using ::google::protobuf::compiler::objectivec::
IsProtobufLibraryBundledProtoFile;
class ObjectiveCGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
public:
ObjectiveCGrpcGenerator() {}
virtual ~ObjectiveCGrpcGenerator() {}
virtual bool Generate(const grpc::protobuf::FileDescriptor *file,
const ::grpc::string ¶meter,
grpc::protobuf::compiler::GeneratorContext *context,
::grpc::string *error) const {
if (file->service_count() == 0) {
// No services. Do nothing.
return true;
}
::grpc::string file_name = grpc_generator::FileNameInUpperCamel(file);
::grpc::string prefix = file->options().objc_class_prefix();
{
// Generate .pbrpc.h
::grpc::string imports = ::grpc::string("#import \"") + file_name +
".pbobjc.h\"\n\n"
"#import <ProtoRPC/ProtoService.h>\n"
"#import <RxLibrary/GRXWriteable.h>\n"
"#import <RxLibrary/GRXWriter.h>\n";
// TODO(jcanizales): Instead forward-declare the input and output types
// and import the files in the .pbrpc.m
::grpc::string proto_imports;
for (int i = 0; i < file->dependency_count(); i++) {
::grpc::string header =
grpc_objective_c_generator::MessageHeaderName(file->dependency(i));
const grpc::protobuf::FileDescriptor *dependency = file->dependency(i);
if (IsProtobufLibraryBundledProtoFile(dependency)) {
::grpc::string base_name = header;
grpc_generator::StripPrefix(&base_name, "google/protobuf/");
// create the import code snippet
proto_imports +=
"#if GPB_USE_PROTOBUF_FRAMEWORK_IMPORTS\n"
" #import <" +
::grpc::string(ProtobufLibraryFrameworkName) + "/" + base_name +
">\n"
"#else\n"
" #import \"" +
header +
"\"\n"
"#endif\n";
} else {
proto_imports += ::grpc::string("#import \"") + header + "\"\n";
}
}
::grpc::string declarations;
for (int i = 0; i < file->service_count(); i++) {
const grpc::protobuf::ServiceDescriptor *service = file->service(i);
declarations += grpc_objective_c_generator::GetHeader(service);
}
static const ::grpc::string kNonNullBegin =
"\nNS_ASSUME_NONNULL_BEGIN\n\n";
static const ::grpc::string kNonNullEnd = "\nNS_ASSUME_NONNULL_END\n";
Write(context, file_name + ".pbrpc.h", imports + '\n' + proto_imports +
'\n' + kNonNullBegin +
declarations + kNonNullEnd);
}
{
// Generate .pbrpc.m
::grpc::string imports = ::grpc::string("#import \"") + file_name +
".pbrpc.h\"\n\n"
"#import <ProtoRPC/ProtoRPC.h>\n"
"#import <RxLibrary/GRXWriter+Immediate.h>\n";
::grpc::string definitions;
for (int i = 0; i < file->service_count(); i++) {
const grpc::protobuf::ServiceDescriptor *service = file->service(i);
definitions += grpc_objective_c_generator::GetSource(service);
}
Write(context, file_name + ".pbrpc.m", imports + '\n' + definitions);
}
return true;
}
private:
// Write the given code into the given file.
void Write(grpc::protobuf::compiler::GeneratorContext *context,
const ::grpc::string &filename, const ::grpc::string &code) const {
std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
context->Open(filename));
grpc::protobuf::io::CodedOutputStream coded_out(output.get());
coded_out.WriteRaw(code.data(), code.size());
}
};
int main(int argc, char *argv[]) {
ObjectiveCGrpcGenerator generator;
return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
}
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