mcs/class/System.Web.Mvc3/Mvc/ValueProviderFactoryCollection.cs

   1 namespace System.Web.Mvc {
   2     using System;
   3     using System.Collections.Generic;
   4     using System.Collections.ObjectModel;
   5     using System.Linq;
   6
   7     public class ValueProviderFactoryCollection : Collection<ValueProviderFactory> {
   8         private IResolver<IEnumerable<ValueProviderFactory>> _serviceResolver;
   9
  10         public ValueProviderFactoryCollection() {
  11             _serviceResolver = new MultiServiceResolver<ValueProviderFactory>(() => Items);
  12         }
  13
  14         public ValueProviderFactoryCollection(IList<ValueProviderFactory> list)
  15             : base(list) {
  16             _serviceResolver = new MultiServiceResolver<ValueProviderFactory>(() => Items);
  17         }
  18
  19         internal ValueProviderFactoryCollection(IResolver<IEnumerable<ValueProviderFactory>> serviceResolver, params ValueProviderFactory[] valueProviderFactories)
  20             : base(valueProviderFactories) {
  21             _serviceResolver = serviceResolver ?? new MultiServiceResolver<ValueProviderFactory>(
  22                    () => Items
  23                    );
  24         }
  25
  26         public IValueProvider GetValueProvider(ControllerContext controllerContext) {
  27             var valueProviders = from factory in _serviceResolver.Current
  28                                  let valueProvider = factory.GetValueProvider(controllerContext)
  29                                  where valueProvider != null
  30                                  select valueProvider;
  31
  32             return new ValueProviderCollection(valueProviders.ToList());
  33         }
  34
  35
  36         protected override void InsertItem(int index, ValueProviderFactory item) {
  37             if (item == null) {
  38                 throw new ArgumentNullException("item");
  39             }
  40             base.InsertItem(index, item);
  41         }
  42
  43         protected override void SetItem(int index, ValueProviderFactory item) {
  44             if (item == null) {
  45                 throw new ArgumentNullException("item");
  46             }
  47             base.SetItem(index, item);
  48         }
  49
  50     }
  51 }