xpath就像查询protobuf消息一样

Irf*_*fan 5 xpath protocol-buffers jsonpath

我正在为protobuf消息寻找类似xpath的查询语言.例如,对于下面显示的Person消息[借用开发者指南]

message Person {
  required string name = 1;
  required int32 id = 2;
  optional string email = 3;

  enum PhoneType {
    MOBILE = 0;
    HOME = 1;
    WORK = 2;
  }

  message PhoneNumber {
    required string number = 1;
    optional PhoneType type = 2 [default = HOME];
  }

  repeated PhoneNumber phone = 4;
}
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我想有像这样的方法

XPBQuery.get(person, "$.id") ==> returns the id
XPBQuery.get(person, "$.name") ==> returns the name
XPBQuery.get(person, "$.phone.number[0]") ==> returns the first phone number
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一种方法是将proto转换为Json并使用JsonPath/JsPath API.但是每次转换为Json可能会很昂贵,特别是对于大型Proto对象.

任何帮助深表感谢.

谢谢,Irfan