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

   1 namespace System.Web.Mvc {
   2     public class ModelMetadataProviders {
   3         private ModelMetadataProvider _currentProvider;
   4         private static ModelMetadataProviders _instance = new ModelMetadataProviders();
   5         private IResolver<ModelMetadataProvider> _resolver;
   6
   7         internal ModelMetadataProviders(IResolver<ModelMetadataProvider> resolver = null) {
   8             _resolver = resolver ?? new SingleServiceResolver<ModelMetadataProvider>(
   9                 () => _currentProvider,
  10                 new DataAnnotationsModelMetadataProvider(),
  11                 "ModelMetadataProviders.Current"
  12             );
  13         }
  14
  15         public static ModelMetadataProvider Current {
  16             get {
  17                 return _instance.CurrentInternal;
  18             }
  19             set {
  20                 _instance.CurrentInternal = value;
  21             }
  22         }
  23
  24         internal ModelMetadataProvider CurrentInternal {
  25             get {
  26                 return _resolver.Current;
  27             }
  28             set {
  29                 _currentProvider = value ?? new EmptyModelMetadataProvider();
  30             }
  31         }
  32     }
  33 }