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namespace System.Web.Mvc {
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc.Async;
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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