mcs/class/System.Web/System.Web.UI/ExpressionBindingCollection.cs

   1 //
   2 // System.Web.UI.ExpressionBindingCollection.cs
   3 //
   4 // Authors:
   5 //      Sanjay Gupta gsanjay@novell.com)
   6 //
   7 // (C) 2004 Novell, Inc. (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 #if NET_2_0
  32 using System;
  33 using System.ComponentModel;
  34 using System.Collections;
  35
  36 namespace System.Web.UI {
  37
  38         public sealed class ExpressionBindingCollection : ICollection, IEnumerable
  39         {
  40                 static readonly object changedEvent = new object ();
  41
  42                 Hashtable list;
  43                 ArrayList removed;
  44
  45                 EventHandlerList events = new EventHandlerList ();
  46
  47                 public event EventHandler Changed {
  48                         add { events.AddHandler (changedEvent, value); }
  49                         remove { events.RemoveHandler (changedEvent, value); }
  50                 }
  51
  52                 public ExpressionBindingCollection ()
  53                 {
  54                         list = new Hashtable ();
  55                         removed = new ArrayList ();
  56                 }
  57
  58                 public int Count {
  59                         get { return list.Count; }
  60                 }
  61
  62                 public bool IsReadOnly {
  63                         get { return list.IsReadOnly; }
  64                 }
  65
  66                 public bool IsSynchronized {
  67                         get { return list.IsSynchronized; }
  68                 }
  69
  70                 public ExpressionBinding this [string propertyName] {
  71                         get { return list [propertyName] as ExpressionBinding; }
  72                 }
  73
  74                 public ICollection RemovedBindings {
  75                         get { return removed; }
  76                 }
  77
  78                 public object SyncRoot {
  79                         get { return list.SyncRoot; }
  80                 }
  81
  82                 public void Add (ExpressionBinding binding)
  83                 {
  84                         list.Add (binding.PropertyName, binding);
  85                         OnChanged (new EventArgs ());
  86                 }
  87
  88                 public void Clear ()
  89                 {
  90                         list.Clear ();
  91                         removed.Clear ();
  92                         OnChanged (new EventArgs ());
  93                 }
  94
  95                 public bool Contains (string propertyName)
  96                 {
  97                         return list.Contains (propertyName);
  98                 }
  99
 100                 public void CopyTo (Array array, int index)
 101                 {
 102                         list.CopyTo (array, index);
 103                 }
 104
 105                 public void CopyTo (ExpressionBinding [] bindings, int index)
 106                 {
 107                         if (index < 0)
 108                                 throw new ArgumentNullException ("Index cannot be negative");
 109                         if (index >= bindings.Length)
 110                                 throw new ArgumentException ("Index cannot be greater than or equal to length of array passed");
 111                         if (list.Count > (bindings.Length - index + 1))
 112                                 throw new ArgumentException ("Number of elements in source is greater than available space from index to end of destination");
 113
 114                         foreach (string key in list.Keys)
 115                                 bindings [index++] = (ExpressionBinding) list [key];
 116                 }
 117
 118                 public IEnumerator GetEnumerator ()
 119                 {
 120                         return list.GetEnumerator ();
 121                 }
 122
 123                 public void Remove (ExpressionBinding binding)
 124                 {
 125                         Remove(binding.PropertyName, true);
 126                 }
 127
 128                 public void Remove (string propertyName)
 129                 {
 130                         Remove (propertyName, true);
 131                 }
 132
 133                 public void Remove (string propertyName, bool addToRemovedList)
 134                 {
 135                         if (addToRemovedList)
 136                                 removed.Add (String.Empty);
 137                         else
 138                                 removed.Add (propertyName);
 139
 140                         list.Remove (propertyName);
 141                         OnChanged (new EventArgs ());
 142                 }
 143
 144                 void OnChanged (EventArgs e)
 145                 {
 146                         EventHandler eh = events [changedEvent] as EventHandler;
 147                         if (eh != null)
 148                                 eh (this, e);
 149                 }
 150
 151         }
 152 }
 153 #endif