// This software is part of the Autofac IoC container
// Copyright (c) 2010 Autofac Contributors
// http://autofac.org
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Linq;
using Autofac.Builder;
using Autofac.Core;
using Autofac.Util;
namespace Autofac.Features.ResolveAnything{
/// <summary>
/// Provides registrations on-the-fly for any concrete type not already registered with
/// the container.
/// </summary>
public class AnyConcreteTypeNotAlreadyRegisteredSource : IRegistrationSource
{
readonly Func<Type, bool> _predicate;
/// <summary>
/// Initializes a new instance of the <see cref="AnyConcreteTypeNotAlreadyRegisteredSource"/> class.
/// </summary>
public AnyConcreteTypeNotAlreadyRegisteredSource()
: this (t => true)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="AnyConcreteTypeNotAlreadyRegisteredSource"/> class.
/// </summary>
/// <param name="predicate">A predicate that selects types the source will register.</param>
public AnyConcreteTypeNotAlreadyRegisteredSource(Func<Type, bool> predicate)
{
_predicate = Enforce.ArgumentNotNull(predicate, "predicate");
}
/// <summary>
/// Retrieve registrations for an unregistered service, to be used
/// by the container.
/// </summary>
/// <param name="service">The service that was requested.</param>
/// <param name="registrationAccessor">A function that will return existing registrations for a service.</param>
/// <returns>Registrations providing the service.</returns>
public IEnumerable<IComponentRegistration> RegistrationsFor(
Service service,
Func<Service, IEnumerable<IComponentRegistration>> registrationAccessor)
{
var ts = service as TypedService;
if (ts == null ||
!ts.ServiceType.IsClass ||
ts.ServiceType.IsSubclassOf(typeof(Delegate)) ||
ts.ServiceType.IsAbstract ||
!_predicate(ts.ServiceType) ||
registrationAccessor(service).Any())
return Enumerable.Empty<IComponentRegistration>();
return new[] { RegistrationBuilder.ForType(ts.ServiceType).CreateRegistration() };
}
/// <summary>
/// Gets whether the registrations provided by this source are 1:1 adapters on top
/// of other components (I.e. like Meta, Func or Owned.)
/// </summary>
public bool IsAdapterForIndividualComponents
{
get { return false; }
}
}
}
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