Define dictionary in protocol buffer

Question

I\'m new to both protocol buffers and C++, so this may be a basic question, but I haven\'t had any luck finding answers. Basically, I want the functionality of a dictionary

Answer 1

In proto3, it's:

extend google.protobuf.EnumValueOptions {
  string name = 12345;
}

enum UnitType {
  KM_PER_HOUR = 0 [(name) = "km/h"];
  MI_PER_HOUR = 1 [(name) = "mph"];
}

and to access it in Java:

UnitType.KM_PER_HOUR.getValueDescriptor().getOptions().getExtension(MyOuterClass.name);