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) 2004-2010 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 using System;
  32 using System.ComponentModel;
  33 using System.Collections;
  34
  35 namespace System.Web.UI {
  36
  37         public sealed class ExpressionBindingCollection : ICollection, IEnumerable
  38         {
  39                 static readonly object changedEvent = new object ();
  40
  41                 Hashtable list;
  42                 ArrayList removed;
  43
  44                 EventHandlerList events = new EventHandlerList ();
  45
  46                 public event EventHandler Changed {
  47                         add { events.AddHandler (changedEvent, value); }
  48                         remove { events.RemoveHandler (changedEvent, value); }
  49                 }
  50
  51                 public ExpressionBindingCollection ()
  52                 {
  53                         list = new Hashtable ();
  54                         removed = new ArrayList ();
  55                 }
  56
  57                 public int Count {
  58                         get { return list.Count; }
  59                 }
  60
  61                 public bool IsReadOnly {
  62                         get { return list.IsReadOnly; }
  63                 }
  64
  65                 public bool IsSynchronized {
  66                         get { return list.IsSynchronized; }
  67                 }
  68
  69                 public ExpressionBinding this [string propertyName] {
  70                         get { return list [propertyName] as ExpressionBinding; }
  71                 }
  72
  73                 public ICollection RemovedBindings {
  74                         get { return removed; }
  75                 }
  76
  77                 public object SyncRoot {
  78                         get { return list.SyncRoot; }
  79                 }
  80
  81                 public void Add (ExpressionBinding binding)
  82                 {
  83                         list.Add (binding.PropertyName, binding);
  84                         OnChanged (new EventArgs ());
  85                 }
  86
  87                 public void Clear ()
  88                 {
  89                         list.Clear ();
  90                         removed.Clear ();
  91                         OnChanged (new EventArgs ());
  92                 }
  93
  94                 public bool Contains (string propName)
  95                 {
  96                         return list.Contains (propName);
  97                 }
  98
  99                 public void CopyTo (Array array, int index)
 100                 {
 101                         list.CopyTo (array, index);
 102                 }
 103
 104                 public void CopyTo (ExpressionBinding [] array, int index)
 105                 {
 106                         if (index < 0)
 107                                 throw new ArgumentNullException ("Index cannot be negative");
 108                         if (index >= array.Length)
 109                                 throw new ArgumentException ("Index cannot be greater than or equal to length of array passed");
 110                         if (list.Count > (array.Length - index + 1))
 111                                 throw new ArgumentException ("Number of elements in source is greater than available space from index to end of destination");
 112
 113                         foreach (string key in list.Keys)
 114                                 array [index++] = (ExpressionBinding) list [key];
 115                 }
 116
 117                 public IEnumerator GetEnumerator ()
 118                 {
 119                         return list.GetEnumerator ();
 120                 }
 121
 122                 public void Remove (ExpressionBinding binding)
 123                 {
 124                         Remove(binding.PropertyName, true);
 125                 }
 126
 127                 public void Remove (string propertyName)
 128                 {
 129                         Remove (propertyName, true);
 130                 }
 131
 132                 public void Remove (string propertyName, bool addToRemovedList)
 133                 {
 134                         if (addToRemovedList)
 135                                 removed.Add (String.Empty);
 136                         else
 137                                 removed.Add (propertyName);
 138
 139                         list.Remove (propertyName);
 140                         OnChanged (new EventArgs ());
 141                 }
 142
 143                 void OnChanged (EventArgs e)
 144                 {
 145                         EventHandler eh = events [changedEvent] as EventHandler;
 146                         if (eh != null)
 147                                 eh (this, e);
 148                 }
 149
 150         }
 151 }