如何在我的Java代码和.proto文件之间共享枚举值

问题描述

我有一个我想要的protobuf类。在那个类中，一个字段是枚举（在它自己的类中）。我可以避免在.proto文件中定义相同的枚举值吗？或者我必须手动确保java代码中的枚举定义与.proto文件中的相同？

java代码：

  public enum位置{
 UNDEF（0），HOME（1），WORK（2）; 
 ... 
} 
  

.proto文件对应代码：

 消息地址{
枚举位置{
 UNDEF = 0; 
 HOME = 1; 
 WORK = 2; 
} 
可选位置addressLocation; 
 ... 
} 
  

解决方案

保持同步的东西的最佳解决方案通常是代码生成;确定您的定义是单一真理点，并从中创建其他定义。协议缓冲区具有具有自动处理重复枚举值的漂亮功能。

I have a class that I wish to protobuf. in that class one of the fields is an enum (in a class of it's own). Can I avoid defining an identical enum value in my .proto file ? Or will I have to manually make sure the enum definition in the java code is the same as in the .proto file?

java code:

public enum Location {
UNDEF(0),HOME(1), WORK(2);
...
}

.proto file corresponding code:

message Address{
    enum location {
        UNDEF = 0;
        HOME = 1;
        WORK = 2;
    }
   optional location addressLocation;
...
}

解决方案

The best solution for keeping things like this in sync is often code generation; determine which of your definitions is the Single Point of Truth, and create the others from it. Protocol Buffers has built-in support for Java code generation with nifty features like automatically handling duplicate enum values.

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