// Copyright (c) 2014 Baidu, Inc. // // Author: Rujie,Jiang jiangrujie@baidu.com // Date: Tue Feb 23 13:56:02 2016 #ifndef BRPC_JSON2PB_JSON_PROTOBUF_MAP_H #define BRPC_JSON2PB_JSON_PROTOBUF_MAP_H #include <google/protobuf/descriptor.h> namespace json2pb { const char* const KEY_NAME = "key"; const char* const VALUE_NAME = "value"; const int KEY_INDEX = 0; const int VALUE_INDEX = 1; // Map inside protobuf is officially supported in proto3 using // statement like: map<string, string> my_map = N; // However, we can still emmulate this map in proto2 by writing: // message MapFieldEntry { // required string key = 1; // MUST be the first // required string value = 2; // MUST be the second // } // repeated MapFieldEntry my_map = N; // // Natually, when converting this map to json, it should be like: // { "my_map": {"key1": value1, "key2": value2 } } // instead of: // { "my_map": [{"key": "key1", "value": value1}, // {"key": "key2", "value": value2}] } // In order to get the former one, the type of `key' field MUST be // string since JSON only supports string keys // Check whether `field' is a map type field and is convertable bool IsProtobufMap(const google::protobuf::FieldDescriptor* field); } // namespace json2pb #endif // BRPC_JSON2PB_JSON_PROTOBUF_MAP_H