背景:我在寫一個protoc
插件。如何在Java中獲得protobuf自定義選項的價值?
syntax = "proto3";
package com.example.proto.options;
import "google/protobuf/descriptor.proto";
option java_multiple_files = true;
option java_outer_classname = "ServerOptionsProto";
option java_package = "com.example.proto.options";
extend google.protobuf.FileOptions {
ServerOptions server = 50621;
}
message ServerOptions {
// Java classname
string name = 1;
}
下面是一個例子用法:
syntax = "proto3";
package com.example.testdata;
import "com/example/proto/options/server.proto";
option java_multiple_files = true;
option java_package = "com.example.testdata.protogen";
option java_outer_classname = "TestDataProto";
option (com.example.proto.options.server).name = "TestData";
試圖跟隨https://developers.google.com/protocol-buffers/docs/proto#options,以下(Groovy中)不工作
定製protobuf的選項與下面的實現:
request.getProtoFileList().stream().filter { proto ->
proto.serviceCount > 0
}.flatMap { proto ->
serverName = proto.getDescriptor().getOptions()?.getExtension(com.example.proto.options.ServerOptionsProto.server)?.name
}
什麼是正確的方式在Java中訪問值的自定義選項?