Protobuf support ?

[jaumard]

On the description it's written that it support protobuf, any example on this ? or maybe it's not implemented yet. Let me know

[tejainece]

it is not implemented yet.

[jaumard]

Thanks @tejainece :) I might try to implement it then

[tejainece]

That will be awesome. Can we hide all the implementation details of Protobuf and make it super simple to use?

[jaumard]

I don't know yet :) but the plan is to make a ProtoRepo like the JsonRepo so it's will be as simple as now, just use proto repo instead of json one. And it will allow you to switch from one to another easily. Hope it will be possible like this... we'll see

[jaumard]

So I was able to give it a try but I'm struggling :(

Here is what Protobuf generates:

///
//  Generated code. Do not modify.
//  source: test.proto
///
// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import

// ignore: UNUSED_SHOWN_NAME
import 'dart:core' show int, bool, double, String, List, override;

import 'package:protobuf/protobuf.dart' as $pb;

class Person extends $pb.GeneratedMessage {
  static final $pb.BuilderInfo _i = new $pb.BuilderInfo('Person')
    ..aOS(1, 'name')
    ..a<int>(2, 'id', $pb.PbFieldType.O3)
    ..aOS(3, 'email')
    ..hasRequiredFields = false
  ;

  Person() : super();
  Person.fromBuffer(List<int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) : super.fromBuffer(i, r);
  Person.fromJson(String i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) : super.fromJson(i, r);
  Person clone() => new Person()..mergeFromMessage(this);
  // ignore: return_of_invalid_type
  Person copyWith(void Function(Person) updates) => super.copyWith((message) => updates(message as Person));
  $pb.BuilderInfo get info_ => _i;
  static Person create() => new Person();
  static $pb.PbList<Person> createRepeated() => new $pb.PbList<Person>();
  static Person getDefault() => _defaultInstance ??= create()..freeze();
  static Person _defaultInstance;
  static void $checkItem(Person v) {
    if (v is! Person) $pb.checkItemFailed(v, _i.qualifiedMessageName);
  }

  String get name => $_getS(0, '');
  set name(String v) { $_setString(0, v); }
  bool hasName() => $_has(0);
  void clearName() => clearField(1);

  int get id => $_get(1, 0);
  set id(int v) { $_setSignedInt32(1, v); }
  bool hasId() => $_has(1);
  void clearId() => clearField(2);

  String get email => $_getS(2, '');
  set email(String v) { $_setString(2, v); }
  bool hasEmail() => $_has(2);
  void clearEmail() => clearField(3);
}

So to serialize we just need to call writeToBuffer and to deserialize we need the static method fromBuffer.

The problem is when I tried to implement the protoRepo I can't really implement the decodeOne method :/

import 'dart:convert';

import '../serializer/serializer.dart';
import 'package:jaguar_serializer/src/repo/repo.dart';
import "codec.dart";
import 'package:protobuf/protobuf.dart' as $pb;

/// Repository that serialize/deserialize JSON.
///
/// Same usage as [SerializerRepo]
class ProtoRepo extends SerializerRepoImpl implements CodecRepo<List<int>> {
  ProtoRepo({List<Serializer> serializers}) : super(serializers: serializers);

  ///@nodoc
  /// use [serialize]
  List<int> encode(dynamic object) {
    return object.writeToBuffer() as List<int>;
  }

  ///@nodoc
  /// use [deserialize]
  dynamic decode<T>(List<int> object) {
    throw 'no needed';
  }

  ///@nodoc
  /// use [deserialize]
  T decodeOne<T>(List<int> object) {
    return T.fromBuffer(object);
  }

  ///@nodoc
  /// use [deserialize]
  List<T> decodeList<T>(List<int> object) {
    throw 'no needed';
  }
}

Any idea how to do such things ? I know dart doesn't allow this, but maybe we can think of a workaround to be able to do this somehow.... @tejainece any ideas ?

[jaumard]

Done by #164 :) 🎆 @tejainece let me know when it's published please