RSGC – DTO Mapper – part 6

 

 

name GeneratedMapper
nuget

https://www.nuget.org/packages/GeneratedMapper/

link https://github.com/ThomasBleijendaal/GeneratedMapper
author Thomas Bleijendaal

AutoMapping from a POCO to a DTO. Lots of customizations
 

The code that you start with is


    public class Department                                    

        {

            public int ID { get; set; }

            public string Name { get; set; }

            

            public List<string> Employees { get; set; }

        }

    

        [IgnoreInTarget("Employees")]

        [MapFrom(typeof(Department))]

        public class DepartmentDTO

        {

            public int ID { get; set; }

            public string Name{get; set;}

    

            [MapWith("Employees",typeof(ResolverLength))]

            public int EmployeesNr { get; set; }

    

        }

        public class ResolverLength

        {

            public int Resolve(List<string> input)

            {

                return ((input?.Count) ?? 0);

            }

        }


The code that you will use is



    static void Main(string[] args)                                

    {

        var dep = new Department();

        dep.Name = "IT";

        dep.ID = 1;

        dep.Employees = new List<string>();

        dep.Employees.Add("Andrei");

        var dto = dep.MapToDepartmentDTO();

        Console.WriteLine(dto.Name+"=>"+ dto.EmployeesNr);

    }

 

The code that is generated is


    namespace DTOMapper                                                                                                                                                                                                        

    {

        public static partial class DepartmentMapToExtensions

        {

            public static DTOMapper.DepartmentDTO MapToDepartmentDTO(this DTOMapper.Department self)

            {

                if (self is null)

                {

                    throw new ArgumentNullException(nameof(self), "DTOMapper.Department -> DTOMapper.DepartmentDTO: Source is null.");

                }

                

                var resolverLength = new DTOMapper.ResolverLength();

                

                var target = new DTOMapper.DepartmentDTO

                {

                    ID = self.ID,

                    Name = (self.Name ?? throw new GeneratedMapper.Exceptions.PropertyNullException("DTOMapper.Department -> DTOMapper.DepartmentDTO: Property Name is null.")),

                    EmployeesNr = resolverLength.Resolve((self.Employees ?? throw new GeneratedMapper.Exceptions.PropertyNullException("DTOMapper.Department -> DTOMapper.DepartmentDTO: Property Employees is null."))),

                };

                

                return target;

            }

        }

    }

    

Example Code: https://github.com/ignatandrei/RSCG_Examples/tree/main/DTOMapper

All RSCG

NrBlog Post
1RSCG–part 1
2RSCG- AppVersion–part 2
3http://msprogrammer.serviciipeweb.ro/2021/02/17/rsgc-enum-part-3/
4RSGC-JSON to Class- part 4
5RSGC-Constructor – Deconstructor – part 5
6RSGC – DTO Mapper – part 6
7RSGC – Skinny Controllers- part 7
8RSGC-Builder Design Pattern – part 8
9RSGC- MetadataFromObject – part 9
10RSGC- Dynamic Mock – part 10
11RSCG- Method Decorator – part 11
12RSCG – Curry – Partial function – part 12
13RSCG- part 13 – IFormattable
14RSCG- part 14 – DP_Decorator
15RSCG- part 15 – Expression Generator
16RSCG- part 16 – Many Others
17RSCG- the book
18RSCG–Template Rendering- part 17
19CI Version
20HttpClientGenerator
21Query from database
22AutoRegister
23TinyTypes
24Static2Interface
25AppSettings
26Properties
27
Roslyn Source Code Generators