Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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65 lines
1.8 KiB
65 lines
1.8 KiB
5 years ago
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#ifndef PROTOBUF_BENCHMARKS_UTIL_DATA_PROTO2_TO_PROTO3_UTIL_H_
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#define PROTOBUF_BENCHMARKS_UTIL_DATA_PROTO2_TO_PROTO3_UTIL_H_
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#include "google/protobuf/message.h"
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#include "google/protobuf/descriptor.h"
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using google::protobuf::FieldDescriptor;
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using google::protobuf::Message;
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using google::protobuf::Reflection;
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namespace google {
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namespace protobuf {
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namespace util {
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class DataStripper {
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public:
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void StripMessage(Message *message) {
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std::vector<const FieldDescriptor*> set_fields;
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const Reflection* reflection = message->GetReflection();
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reflection->ListFields(*message, &set_fields);
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for (size_t i = 0; i < set_fields.size(); i++) {
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const FieldDescriptor* field = set_fields[i];
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if (ShouldBeClear(field)) {
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reflection->ClearField(message, field);
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continue;
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}
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if (field->type() == FieldDescriptor::TYPE_MESSAGE) {
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if (field->is_repeated()) {
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for (int j = 0; j < reflection->FieldSize(*message, field); j++) {
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StripMessage(reflection->MutableRepeatedMessage(message, field, j));
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}
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} else {
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StripMessage(reflection->MutableMessage(message, field));
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}
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}
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}
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reflection->MutableUnknownFields(message)->Clear();
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}
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private:
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virtual bool ShouldBeClear(const FieldDescriptor *field) = 0;
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};
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class GogoDataStripper : public DataStripper {
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private:
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virtual bool ShouldBeClear(const FieldDescriptor *field) {
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return field->type() == FieldDescriptor::TYPE_GROUP;
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}
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};
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class Proto3DataStripper : public DataStripper {
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private:
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virtual bool ShouldBeClear(const FieldDescriptor *field) {
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return field->type() == FieldDescriptor::TYPE_GROUP ||
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field->is_extension();
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}
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};
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} // namespace util
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} // namespace protobuf
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} // namespace google
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#endif // PROTOBUF_BENCHMARKS_UTIL_DATA_PROTO2_TO_PROTO3_UTIL_H_
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