class/System.Web.Mvc/System.Web.Mvc/ModelBinderDictionary.cs

   1 /* ****************************************************************************
   2  *
   3  * Copyright (c) Microsoft Corporation. All rights reserved.
   4  *
   5  * This software is subject to the Microsoft Public License (Ms-PL).
   6  * A copy of the license can be found in the license.htm file included
   7  * in this distribution.
   8  *
   9  * You must not remove this notice, or any other, from this software.
  10  *
  11  * ***************************************************************************/
  12
  13 namespace System.Web.Mvc {
  14     using System;
  15     using System.Collections;
  16     using System.Collections.Generic;
  17     using System.Diagnostics.CodeAnalysis;
  18     using System.Globalization;
  19     using System.Web.Mvc.Resources;
  20
  21     public class ModelBinderDictionary : IDictionary<Type, IModelBinder> {
  22
  23         private IModelBinder _defaultBinder;
  24         private readonly Dictionary<Type, IModelBinder> _innerDictionary = new Dictionary<Type, IModelBinder>();
  25
  26         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  27         public int Count {
  28             get {
  29                 return _innerDictionary.Count;
  30             }
  31         }
  32
  33         public IModelBinder DefaultBinder {
  34             get {
  35                 if (_defaultBinder == null) {
  36                     _defaultBinder = new DefaultModelBinder();
  37                 }
  38                 return _defaultBinder;
  39             }
  40             set {
  41                 _defaultBinder = value;
  42             }
  43         }
  44
  45         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  46         public bool IsReadOnly {
  47             get {
  48                 return ((IDictionary<Type, IModelBinder>)_innerDictionary).IsReadOnly;
  49             }
  50         }
  51
  52         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  53         public ICollection<Type> Keys {
  54             get {
  55                 return _innerDictionary.Keys;
  56             }
  57         }
  58
  59         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  60         public IModelBinder this[Type key] {
  61             get {
  62                 IModelBinder binder;
  63                 _innerDictionary.TryGetValue(key, out binder);
  64                 return binder;
  65             }
  66             set {
  67                 _innerDictionary[key] = value;
  68             }
  69         }
  70
  71         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  72         public ICollection<IModelBinder> Values {
  73             get {
  74                 return _innerDictionary.Values;
  75             }
  76         }
  77
  78         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  79         public void Add(KeyValuePair<Type, IModelBinder> item) {
  80             ((IDictionary<Type, IModelBinder>)_innerDictionary).Add(item);
  81         }
  82
  83         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  84         public void Add(Type key, IModelBinder value) {
  85             _innerDictionary.Add(key, value);
  86         }
  87
  88         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  89         public void Clear() {
  90             _innerDictionary.Clear();
  91         }
  92
  93         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  94         public bool Contains(KeyValuePair<Type, IModelBinder> item) {
  95             return ((IDictionary<Type, IModelBinder>)_innerDictionary).Contains(item);
  96         }
  97
  98         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
  99         public bool ContainsKey(Type key) {
 100             return _innerDictionary.ContainsKey(key);
 101         }
 102
 103         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
 104         public void CopyTo(KeyValuePair<Type, IModelBinder>[] array, int arrayIndex) {
 105             ((IDictionary<Type, IModelBinder>)_innerDictionary).CopyTo(array, arrayIndex);
 106         }
 107
 108         public IModelBinder GetBinder(Type modelType) {
 109             return GetBinder(modelType, true /* fallbackToDefault */);
 110         }
 111
 112         public virtual IModelBinder GetBinder(Type modelType, bool fallbackToDefault) {
 113             if (modelType == null) {
 114                 throw new ArgumentNullException("modelType");
 115             }
 116
 117             return GetBinder(modelType, (fallbackToDefault) ? DefaultBinder : null);
 118         }
 119
 120         private IModelBinder GetBinder(Type modelType, IModelBinder fallbackBinder) {
 121             // Try to look up a binder for this type. We use this order of precedence:
 122             // 1. Binder registered in the global table
 123             // 2. Binder attribute defined on the type
 124             // 3. Supplied fallback binder
 125
 126             IModelBinder binder;
 127             if (_innerDictionary.TryGetValue(modelType, out binder)) {
 128                 return binder;
 129             }
 130
 131             binder = ModelBinders.GetBinderFromAttributes(modelType,
 132                 () => String.Format(CultureInfo.CurrentUICulture, MvcResources.ModelBinderDictionary_MultipleAttributes, modelType.FullName));
 133
 134             return binder ?? fallbackBinder;
 135         }
 136
 137         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
 138         public IEnumerator<KeyValuePair<Type, IModelBinder>> GetEnumerator() {
 139             return _innerDictionary.GetEnumerator();
 140         }
 141
 142         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
 143         public bool Remove(KeyValuePair<Type, IModelBinder> item) {
 144             return ((IDictionary<Type, IModelBinder>)_innerDictionary).Remove(item);
 145         }
 146
 147         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
 148         public bool Remove(Type key) {
 149             return _innerDictionary.Remove(key);
 150         }
 151
 152         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
 153         public bool TryGetValue(Type key, out IModelBinder value) {
 154             return _innerDictionary.TryGetValue(key, out value);
 155         }
 156
 157         #region IEnumerable Members
 158         [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
 159         IEnumerator IEnumerable.GetEnumerator() {
 160             return ((IEnumerable)_innerDictionary).GetEnumerator();
 161         }
 162         #endregion
 163
 164     }
 165 }