你如何编码Map< String，Object>使用协议缓冲区？ [英] How would you encode a Map<String, Object> using Protocol Buffers?
问题描述
我正在尝试使用 Protocol Buffers 。
我的消息格式应包含Map< String，Object> entries ...但是如何编写.proto定义？
My message format should contain Map< String, Object > entries ... but how do I write the .proto definition?
据我所知，Protocol Buffers没有内置Map类型。我可以使用重复字段来模拟它。但我遇到的最大问题是，您需要定义所有类型。我希望我的信息灵活，所以我不能指定类型。
As far as I know, Protocol Buffers does not have a build-in Map type. I could model around that using repeating fields. But the big problem I have is, that you need to define all your types. I want my message to be flexible, so I can't specify the types.
任何想法？
推荐答案
我要用一个元组建模一个键和一个值（可能是每个类型的一个值字段）。然后只需要重复列出该元组类型。你需要在代码中构建地图。
I'd model a tuple with a key and a value (probably one value field per type that the value could be). Then just have a repeated list of that tuple type. You'd need to build the map itself in code.
当你说你不能指定类型时 - 你在谈论什么类型的？如果元组中有每个类型的可选字段，则可以处理所有基元 - 并且可以通过将消息序列化为字节字符串来映射消息。
When you say you can't specify the types - what sort of types are you talking about? If you have an optional field of each type in the tuple, then that would cope for all the primitives - and you could map messages by serializing them into a byte string.
听起来你所拥有的非结构水平可能不适合PB。
It sounds like the level of "unstructure" you have may not be a good fit for PB though.
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