TransientDetails.md

Transient details

Creating an object graph of 22 transient objects.

Class diagram

classDiagram
	class Transient {
		<<partial>>
		+CompositionRoot TestPureDIByCR()
		+ T ResolveᐸTᐳ()
		+ T ResolveᐸTᐳ(object? tag)
		+ object Resolve(Type type)
		+ object Resolve(Type type, object? tag)
	}
	class CompositionRoot {
		+CompositionRoot(IService1 service1, IService2 service21, IService2 service22, IService2 service23, IService3 service3, IService4 service41, IService4 service42)
	}
	Service1 --|> IService1
	class Service1 {
		+Service1(IService2 service2)
	}
	Service2 --|> IService2
	class Service2 {
		+Service2(IService3 service31, IService3 service32, IService3 service33, IService3 service34, IService3 service35)
	}
	Service3 --|> IService3
	class Service3 {
		+Service3(IService4 service41, IService4 service42)
	}
	Service4 --|> IService4
	class Service4 {
		+Service4()
	}
	class IService1 {
		<<interface>>
	}
	class IService2 {
		<<interface>>
	}
	class IService3 {
		<<interface>>
	}
	class IService4 {
		<<interface>>
	}
	CompositionRoot *--  Service1 : IService1
	CompositionRoot *-- "3 " Service2 : IService2
	CompositionRoot *--  Service3 : IService3
	CompositionRoot *-- "2 " Service4 : IService4
	Transient ..> CompositionRoot : CompositionRoot TestPureDIByCR()
	Service1 *--  Service2 : IService2
	Service2 *-- "5 " Service3 : IService3
	Service3 *-- "2 " Service4 : IService4

Loading

Generated code

The following partial class will be generated:

partial class Transient
{
  private readonly Transient _root;

  [OrdinalAttribute(20)]
  public Transient()
  {
    _root = this;
  }

  internal Transient(Transient parentScope)
  {
    _root = (parentScope ?? throw new ArgumentNullException(nameof(parentScope)))._root;
  }

  [MethodImpl(MethodImplOptions.AggressiveInlining)]
  public partial CompositionRoot TestPureDIByCR()
  {
    return new CompositionRoot(new Service1(new Service2(new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()))), new Service2(new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4())), new Service2(new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4())), new Service2(new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4()), new Service3(new Service4(), new Service4())), new Service3(new Service4(), new Service4()), new Service4(), new Service4());
  }

  [MethodImpl(MethodImplOptions.AggressiveInlining)]
  public T Resolve<T>()
  {
    return Resolver<T>.Value.Resolve(this);
  }

  [MethodImpl(MethodImplOptions.AggressiveInlining)]
  public T Resolve<T>(object? tag)
  {
    return Resolver<T>.Value.ResolveByTag(this, tag);
  }

  [MethodImpl(MethodImplOptions.AggressiveInlining)]
  public object Resolve(Type type)
  {
    var index = (int)(_bucketSize * ((uint)RuntimeHelpers.GetHashCode(type) % 1));
    ref var pair = ref _buckets[index];
    return pair.Key == type ? pair.Value.Resolve(this) : Resolve(type, index);
  }

  [MethodImpl(MethodImplOptions.NoInlining)]
  private object Resolve(Type type, int index)
  {
    var finish = index + _bucketSize;
    while (++index < finish)
    {
      ref var pair = ref _buckets[index];
      if (pair.Key == type)
      {
        return pair.Value.Resolve(this);
      }
    }

    throw new InvalidOperationException($"{CannotResolveMessage} {OfTypeMessage} {type}.");
  }

  [MethodImpl(MethodImplOptions.AggressiveInlining)]
  public object Resolve(Type type, object? tag)
  {
    var index = (int)(_bucketSize * ((uint)RuntimeHelpers.GetHashCode(type) % 1));
    ref var pair = ref _buckets[index];
    return pair.Key == type ? pair.Value.ResolveByTag(this, tag) : Resolve(type, tag, index);
  }

  [MethodImpl(MethodImplOptions.NoInlining)]
  private object Resolve(Type type, object? tag, int index)
  {
    var finish = index + _bucketSize;
    while (++index < finish)
    {
      ref var pair = ref _buckets[index];
      if (pair.Key == type)
      {
        return pair.Value.ResolveByTag(this, tag);
      }
    }

    throw new InvalidOperationException($"{CannotResolveMessage} \"{tag}\" {OfTypeMessage} {type}.");
  }

  private readonly static int _bucketSize;
  private readonly static Pair<Type, IResolver<Transient, object>>[] _buckets;

  static Transient()
  {
    var valResolver_0000 = new Resolver_0000();
    Resolver<CompositionRoot>.Value = valResolver_0000;
    _buckets = Buckets<Type, IResolver<Transient, object>>.Create(
      1,
      out _bucketSize,
      new Pair<Type, IResolver<Transient, object>>[1]
      {
         new Pair<Type, IResolver<Transient, object>>(typeof(CompositionRoot), valResolver_0000)
      });
  }

  private const string CannotResolveMessage = "Cannot resolve composition root ";
  private const string OfTypeMessage = "of type ";

  private class Resolver<T>: IResolver<Transient, T>
  {
    public static IResolver<Transient, T> Value = new Resolver<T>();

    public virtual T Resolve(Transient composite)
    {
      throw new InvalidOperationException($"{CannotResolveMessage}{OfTypeMessage}{typeof(T)}.");
    }

    public virtual T ResolveByTag(Transient composite, object tag)
    {
      throw new InvalidOperationException($"{CannotResolveMessage}\"{tag}\" {OfTypeMessage}{typeof(T)}.");
    }
  }

  private sealed class Resolver_0000: Resolver<CompositionRoot>
  {
    public override CompositionRoot Resolve(Transient composition)
    {
      return composition.TestPureDIByCR();
    }

    public override CompositionRoot ResolveByTag(Transient composition, object tag)
    {
      switch (tag)
      {
        case null:
          return composition.TestPureDIByCR();

        default:
          return base.ResolveByTag(composition, tag);
      }
    }
  }
}