array.md

Array

Specifying T[] as the injection type allows instances from all bindings that implement the T type to be injected.

using Shouldly;
using Pure.DI;

DI.Setup(nameof(Composition))
    .Bind<IDependency>().To<AbcDependency>()
    .Bind<IDependency>(2).To<XyzDependency>()
    .Bind<IService>().To<Service>()

    // Composition root
    .Root<IService>("Root");

var composition = new Composition();
var service = composition.Root;
service.Dependencies.Length.ShouldBe(2);
service.Dependencies[0].ShouldBeOfType<AbcDependency>();
service.Dependencies[1].ShouldBeOfType<XyzDependency>();

interface IDependency;

class AbcDependency : IDependency;

class XyzDependency : IDependency;

interface IService
{
    IDependency[] Dependencies { get; }
}

class Service(IDependency[] dependencies) : IService
{
    public IDependency[] Dependencies { get; } = dependencies;
}

Running this code sample locally

• Make sure you have the .NET SDK 9.0 or later is installed

dotnet --list-sdk

• Create a net9.0 (or later) console application

dotnet new console -n Sample

• Add references to NuGet packages
  • Pure.DI
  • Shouldly

dotnet add package Pure.DI
dotnet add package Shouldly

• Copy the example code into the Program.cs file

You are ready to run the example 🚀

dotnet run

In addition to arrays, other collection types are also supported, such as:

• System.Memory
• System.ReadOnlyMemory
• System.Span
• System.ReadOnlySpan
• System.Collections.Generic.ICollection
• System.Collections.Generic.IList
• System.Collections.Generic.List
• System.Collections.Generic.IReadOnlyCollection
• System.Collections.Generic.IReadOnlyList
• System.Collections.Generic.ISet
• System.Collections.Generic.HashSet
• System.Collections.Generic.SortedSet
• System.Collections.Generic.Queue
• System.Collections.Generic.Stack
• System.Collections.Immutable.ImmutableArray
• System.Collections.Immutable.IImmutableList
• System.Collections.Immutable.ImmutableList
• System.Collections.Immutable.IImmutableSet
• System.Collections.Immutable.ImmutableHashSet
• System.Collections.Immutable.ImmutableSortedSet
• System.Collections.Immutable.IImmutableQueue
• System.Collections.Immutable.ImmutableQueue
• System.Collections.Immutable.IImmutableStack And of course this list can easily be supplemented on its own.

The following partial class will be generated:

partial class Composition
{
  private readonly Composition _root;

  [OrdinalAttribute(256)]
  public Composition()
  {
    _root = this;
  }

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

  public IService Root
  {
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    get
    {
      return new Service(new IDependency[2] { new AbcDependency(), new XyzDependency() });
    }
  }
}

Class diagram:

---
 config:
  class:
   hideEmptyMembersBox: true
---
classDiagram
	AbcDependency --|> IDependency
	XyzDependency --|> IDependency : 2 
	Service --|> IService
	Composition ..> Service : IService Root
	Service *--  ArrayᐸIDependencyᐳ : ArrayᐸIDependencyᐳ
	ArrayᐸIDependencyᐳ *--  AbcDependency : IDependency
	ArrayᐸIDependencyᐳ *--  XyzDependency : 2  IDependency
	class ArrayᐸIDependencyᐳ {
			<<array>>
	}
	namespace Pure.DI.UsageTests.BCL.ArrayScenario {
		class AbcDependency {
			+AbcDependency()
		}
		class Composition {
		<<partial>>
		+IService Root
		}
		class IDependency {
			<<interface>>
		}
		class IService {
			<<interface>>
		}
		class Service {
			+Service(ArrayᐸIDependencyᐳ dependencies)
		}
		class XyzDependency {
			+XyzDependency()
		}
	}

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