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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.Collections.ObjectModel;
using System.Linq;
namespace System.Web.Mvc
{
public class ValueProviderFactoryCollection : Collection<ValueProviderFactory>
{
private IResolver<IEnumerable<ValueProviderFactory>> _serviceResolver;
public ValueProviderFactoryCollection()
{
_serviceResolver = new MultiServiceResolver<ValueProviderFactory>(() => Items);
}
public ValueProviderFactoryCollection(IList<ValueProviderFactory> list)
: base(list)
{
_serviceResolver = new MultiServiceResolver<ValueProviderFactory>(() => Items);
}
internal ValueProviderFactoryCollection(IResolver<IEnumerable<ValueProviderFactory>> serviceResolver, params ValueProviderFactory[] valueProviderFactories)
: base(valueProviderFactories)
{
_serviceResolver = serviceResolver ?? new MultiServiceResolver<ValueProviderFactory>(() => Items);
}
public IValueProvider GetValueProvider(ControllerContext controllerContext)
{
var valueProviders = from factory in _serviceResolver.Current
let valueProvider = factory.GetValueProvider(controllerContext)
where valueProvider != null
select valueProvider;
return new ValueProviderCollection(valueProviders.ToList());
}
protected override void InsertItem(int index, ValueProviderFactory item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
base.InsertItem(index, item);
}
protected override void SetItem(int index, ValueProviderFactory item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
base.SetItem(index, item);
}
}
}
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