dart_mapper 1.0.1

MapStruct-style object mapping for Dart. Define type-safe mappings declaratively with annotations and get generated implementations at compile time via build_runner.

example/example.dart

/*
 * Copyright (c) 2026 MyLittleSuite
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

import 'package:dart_mapper/dart_mapper.dart';

class UserDto {
  final String name;
  final String email;
  const UserDto({required this.name, required this.email});
}

class UserEntity {
  final String fullName;
  final String emailAddress;
  const UserEntity({required this.fullName, required this.emailAddress});
}

// Mapper definition — run `dart run build_runner build` to generate the
// concrete implementation (_$UserMapperImpl).
@Mapper()
abstract class UserMapper {
  @Mapping(target: 'fullName', source: 'name')
  @Mapping(target: 'emailAddress', source: 'email')
  UserEntity toEntity(UserDto dto);
}

void main() {
  // dart_mapper generates implementations at compile time via build_runner.
  // After running `dart run build_runner build`, use:
  //   final mapper = UserMapper();
  //   final entity = mapper.toEntity(UserDto(name: 'Alice', email: '[e-mail]'));
  print('dart_mapper example — see README for full usage.');
}