AutofacServiceLocator.cs :  » Inversion-of-Control-Dependency-Injection » Autofac » AutofacContrib » CommonServiceLocator » C# / CSharp Open Source

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Autofac;
using Microsoft.Practices.ServiceLocation;

namespace AutofacContrib.CommonServiceLocator{
  public sealed class AutofacServiceLocator : ServiceLocatorImplBase
  {
    readonly IComponentContext _container;

    public AutofacServiceLocator(IComponentContext container)
    {
      if (container == null)
        throw new ArgumentNullException("container");
      _container = container;
    }

    protected override object DoGetInstance(Type serviceType, string key)
    {
        return key != null ? _container.Resolve(key, serviceType) : _container.Resolve(serviceType);
    }

      protected override IEnumerable<object> DoGetAllInstances(Type serviceType)
    {
      var enumerableType = typeof (IEnumerable<>).MakeGenericType(serviceType);

            object instance = _container.Resolve(enumerableType);
      return ((IEnumerable) instance).Cast<object>();
    }
  }
}