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using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
namespace System.Web.Mvc
{
public class ModelBinderProviderCollection : Collection<IModelBinderProvider>
{
private IResolver<IEnumerable<IModelBinderProvider>> _serviceResolver;
public ModelBinderProviderCollection()
{
_serviceResolver = new MultiServiceResolver<IModelBinderProvider>(() => Items);
}
public ModelBinderProviderCollection(IList<IModelBinderProvider> list)
: base(list)
{
_serviceResolver = new MultiServiceResolver<IModelBinderProvider>(() => Items);
}
internal ModelBinderProviderCollection(IResolver<IEnumerable<IModelBinderProvider>> resolver, params IModelBinderProvider[] providers)
: base(providers)
{
_serviceResolver = resolver ?? new MultiServiceResolver<IModelBinderProvider>(() => Items);
}
private IEnumerable<IModelBinderProvider> CombinedItems
{
get { return _serviceResolver.Current; }
}
protected override void InsertItem(int index, IModelBinderProvider item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
base.InsertItem(index, item);
}
protected override void SetItem(int index, IModelBinderProvider item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
base.SetItem(index, item);
}
public IModelBinder GetBinder(Type modelType)
{
if (modelType == null)
{
throw new ArgumentNullException("modelType");
}
var modelBinders = from providers in CombinedItems
let modelBinder = providers.GetBinder(modelType)
where modelBinder != null
select modelBinder;
return modelBinders.FirstOrDefault();
}
}
}
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