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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Linq;
namespace System.Web.Mvc
{
public class FilterAttributeFilterProvider : IFilterProvider
{
private readonly bool _cacheAttributeInstances;
public FilterAttributeFilterProvider()
: this(true)
{
}
public FilterAttributeFilterProvider(bool cacheAttributeInstances)
{
_cacheAttributeInstances = cacheAttributeInstances;
}
protected virtual IEnumerable<FilterAttribute> GetActionAttributes(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
{
return actionDescriptor.GetFilterAttributes(_cacheAttributeInstances);
}
protected virtual IEnumerable<FilterAttribute> GetControllerAttributes(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
{
return actionDescriptor.ControllerDescriptor.GetFilterAttributes(_cacheAttributeInstances);
}
public virtual IEnumerable<Filter> GetFilters(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
{
ControllerBase controller = controllerContext.Controller;
if (controller == null)
{
return Enumerable.Empty<Filter>();
}
var typeFilters = GetControllerAttributes(controllerContext, actionDescriptor)
.Select(attr => new Filter(attr, FilterScope.Controller, null));
var methodFilters = GetActionAttributes(controllerContext, actionDescriptor)
.Select(attr => new Filter(attr, FilterScope.Action, null));
return typeFilters.Concat(methodFilters).ToList();
}
}
}
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