How to scan and auto-configure profiles in AutoMapper?

Question

Is there any way to auto-configue Automapper to scan for all profiles in namespace/assembly? What I would like to do is to add mapping profiles to AutoMapper from given assembly filtered by given interface, something like Scan Conventions in StructureMap:

    public static void Configure()
    {
        ObjectFactory.Initialize(x =>
            {
                // Scan Assembly
                x.Scan(
                    scanner =>
                    {
                        scanner.TheCallingAssembly();
                        scanner.Convention<MyCustomConvention>();
                        scanner.WithDefaultConventions();
                    });

                // Add Registries
                x.AddRegistry(new SomeRegistry());
            });

        Debug.WriteLine(ObjectFactory.WhatDoIHave());
    }

public class MyCustomConvention : IRegistrationConvention
{
    public void Process(Type type, Registry registry)
    {
        if (!type.CanBeCastTo(typeof(IMyType)))
        {
            return;
        }

        string name = type.Name.Replace("SomeRubishName", String.Empty);
        registry.AddType(typeof(IMyType), type, name);            
    }

I've tried to use SelfConfigure but can't find any documentation on how to use it to filter out profiles:

    public static void Configure()
    {
        Mapper.Initialize(x =>
                              {
                                  // My Custom profile
                                  x.AddProfile<MyMappingProfile>();

                                  // Scan Assembly
                                  x.SelfConfigure(Assembly.GetCallingAssembly());
                              });
    }

Another question is how can I report all maps/profiles already initialized (something like ObjectFactory.WhatDoIHave() in StructureMap)?

Answer 1

Yeah, that would be fantastic...and exactly what I'm overhauling for V2. Scanning, registration, conventions etc.

There's not a good "What do I have" feature, but I think it would definitely be worth adding.

Answer 2

I have it like this, don't know if it is the best way but it works very well on pretty large project.

public class AutoMapperGlobalConfiguration : IGlobalConfiguration
    {
        private AutoMapper.IConfiguration _configuration;

        public AutoMapperGlobalConfiguration(IConfiguration configuration)
        {
            _configuration = configuration;
        }

        public void Configure()
        {
            //add all defined profiles
            var query = this.GetType().Assembly.GetExportedTypes()
                .Where(x => x.CanBeCastTo(typeof(AutoMapper.Profile)));

            _configuration.RecognizePostfixes("Id");

            foreach (Type type in query)
            {
                _configuration.AddProfile(ObjectFactory.GetInstance(type).As<Profile>());
            }

            //create maps for all Id2Entity converters
            MapAllEntities(_configuration);

           Mapper.AssertConfigurationIsValid();
        }

        private static void MapAllEntities(IProfileExpression configuration)
        {
            //get all types from the SR.Domain assembly and create maps that
            //convert int -> instance of the type using Id2EntityConverter
            var openType = typeof(Id2EntityConverter<>);
            var idType = typeof(int);
            var persistentEntties = typeof(SR.Domain.Policy.Entities.Bid).Assembly.GetTypes()
               .Where(t => typeof(EntityBase).IsAssignableFrom(t))
               .Select(t => new
               {
                   EntityType = t,
                   ConverterType = openType.MakeGenericType(t)
               });
            foreach (var e in persistentEntties)
            {
                var map = configuration.CreateMap(idType, e.EntityType);
                map.ConvertUsing(e.ConverterType);
            }
        }
    }
}

Answer 3

I found this post while searching as well, but this is how I implemented an auto mapping scheme:

public class MyCustomMap : Profile
{
    protected override void Configure()
    {
        CreateMap<MyCustomViewModel, MyCustomObject>()
            .ForMember(dest => dest.Phone,
                        opt => opt.MapFrom(
                        src => src.PhoneAreaCode + src.PhoneFirstThree + src.PhoneLastFour));
    }
}

public static class AutoMapperConfiguration
{
    public static void Configure()
    {
        Mapper.Initialize(x => GetConfiguration(Mapper.Configuration));
    }

    private static void GetConfiguration(IConfiguration configuration)
    {
        var profiles = typeof(MyCustomMap).Assembly.GetTypes().Where(x => typeof(Profile).IsAssignableFrom(x));
        foreach (var profile in profiles)
        {
            configuration.AddProfile(Activator.CreateInstance(profile) as Profile);
        }
    }
}

So when my application starts, all I call is

AutoMapperConfiguration.Configure(); 

And all my maps are registered.