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

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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

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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

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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