json2proto

Json2proto

Json2proto is a command line tool for converting some json files to protobuf's proto file.
json2proto���԰Ѷ���洢json������ļ���Ϊ[ProtoBuf](https://developers.google.com/protocol-buffers/)��proto�ļ���

Solution

���������һ��json����
	p0 : {
		"x" : 0,
		"y" : 1
	}

�����[ProtoBuf](https://developers.google.com/protocol-buffers/)����ʾ�������Ϳ����������ģ�
	message Position1 {
	  optional int8 x = 1;
	  optional int8 y = 2;
	}
��Ȼ�����������Ҳ���ܴ洢��������, ֻ�Ƕ��˸������ֶ�, �ַ����ͷ�Χ����һЩ���ѡ�
	message Position2 {
	  optional int32 x = 1;
	  optional int32 y = 2;
	  optional int32 z = 3;
	}

���ͬʱҪ�洢p0�������p1����
	p1 : {
		x : 0,
		y : 1,
		z : 2.5
	}
��ô��С(�����ֶΣ� ��С��Χ������)�Ŀ���ͬʱ�������������������Ӧ���������ģ�
	message Position3 {
		optional uint8 x = 1;
		optional uint8 y = 2;
		optional float z = 3;
	}


json2protoͨ�������е������ֶ�_title�� ��ȷ����Щ��������ͬһ�����ͣ� ��������С����������Щ��������͡�
����û��_title�ֶεĶ��� json2proto����ͨ��-a�������Զ����շ���·������_title��

Install

• Install node.js

• Install with npm

    npm install -g json2proto

Usage

	Usage: json2proto [options] file
	Options:
	  -h, --help                   Display this information.
	  -v, --version                Print the compiler version.
	  -o, --output                 Set the output file name.
	  -a, --auto                   Automatically generate a title for unnamed object.
	  -p, --prefix                 Set the class name prefix, default prefix is json2proto
	  -n, --namespace              Set the namespace, default namespace is json2proto
	  -t, --title_tag              Specify the title_tag for searching class name, default title is "_title".

Example

motion.json:
	{
			"rows": [
			{
					"motion_id": 11001,
							"name": "���˼粿�³�",
							"privileges": [
									"owner",
							"admin",
							"user",
							"guest"
									],
							"type": "����",
							"category": "��"
			},
			{
					"motion_id": 11002,
					"name": "ֱ��粿�³�",
					"privileges": [
							"owner",
					"admin",
					"user",
					"guest"
							],
					"type": "����",
					"category": "��"
			}
			]
	}

command line:
	json2pb -omotion.proto -a motion.json

motion.proto:    
	syntax = "proto3";
	package json2proto ;

	message json2proto_motion {
		repeated json2proto_motion_rows rows = 1;
	}

	message json2proto_motion_rows {
				 int32 motion_id = 1;
				 string name = 2;
		repeated string privileges = 3;
				 string type = 4;
				 string category = 5;
	}


����ԭʼjson�ļ��в�������_title�ֶΣ� ������-a�������Զ�������
motion.jot
{
		"rows": [
			{
				"motion_id": 11001,
				"name": "���˼粿�³�",
				"privileges": [
					"owner",
					"admin",
					"user",
					"guest"
				],
				"type": "����",
				"category": "��",
				"_title": "json2proto_motion_rows"
			},
			{
				"motion_id": 11002,
				"name": "ֱ��粿�³�",
				"privileges": [
					"owner",
					"admin",
					"user",
					"guest"
				],
				"type": "����",
				"category": "��",
				"_title": "json2proto_motion_rows"
			}
		],
		"_title": "json2proto_motion"
	}

Author

@randyliu

Licence

See the MIT License