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DefaultControllerActivator.cs
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DefaultControllerActivator.cs
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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using Microsoft.AspNetCore.Mvc.Core;
using Microsoft.AspNetCore.Mvc.Internal;
namespace Microsoft.AspNetCore.Mvc.Controllers
{
/// <summary>
/// <see cref="IControllerActivator"/> that uses type activation to create controllers.
/// </summary>
public class DefaultControllerActivator : IControllerActivator
{
private readonly ITypeActivatorCache _typeActivatorCache;
/// <summary>
/// Creates a new <see cref="DefaultControllerActivator"/>.
/// </summary>
/// <param name="typeActivatorCache">The <see cref="ITypeActivatorCache"/>.</param>
public DefaultControllerActivator(ITypeActivatorCache typeActivatorCache)
{
if (typeActivatorCache == null)
{
throw new ArgumentNullException(nameof(typeActivatorCache));
}
_typeActivatorCache = typeActivatorCache;
}
/// <inheritdoc />
public virtual object Create(ControllerContext controllerContext)
{
if (controllerContext == null)
{
throw new ArgumentNullException(nameof(controllerContext));
}
if (controllerContext.ActionDescriptor == null)
{
throw new ArgumentException(Resources.FormatPropertyOfTypeCannotBeNull(
nameof(ControllerContext.ActionDescriptor),
nameof(ControllerContext)));
}
var controllerTypeInfo = controllerContext.ActionDescriptor.ControllerTypeInfo;
if (controllerTypeInfo == null)
{
throw new ArgumentException(Resources.FormatPropertyOfTypeCannotBeNull(
nameof(controllerContext.ActionDescriptor.ControllerTypeInfo),
nameof(ControllerContext.ActionDescriptor)));
}
var serviceProvider = controllerContext.HttpContext.RequestServices;
return _typeActivatorCache.CreateInstance<object>(serviceProvider, controllerTypeInfo.AsType());
}
/// <inheritdoc />
public virtual void Release(ControllerContext context, object controller)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (controller == null)
{
throw new ArgumentNullException(nameof(controller));
}
var disposable = controller as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
}
}