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

   1 //
   2 // System.Web.UI/KeyedList.cs
   3 //
   4 // Author: Todd Berman <tberman@gentoo.org>
   5 //
   6 // (C) 2003 Todd Berman
   7
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30
  31 using System.Collections;
  32 using System.Collections.Specialized;
  33
  34 namespace System.Web.UI
  35 {
  36
  37         internal class KeyedList : IOrderedDictionary, IStateManager
  38         {
  39
  40                 private Hashtable objectTable = new Hashtable ();
  41                 private ArrayList objectList = new ArrayList ();
  42
  43                 public void Add (object key, object value)
  44                 {
  45                         objectTable.Add (key, value);
  46                         objectList.Add (new DictionaryEntry (key, value));
  47                 }
  48
  49                 public void Clear ()
  50                 {
  51                         objectTable.Clear ();
  52                         objectList.Clear ();
  53                 }
  54
  55                 public bool Contains (object key)
  56                 {
  57                         return objectTable.Contains (key);
  58                 }
  59
  60                 public void CopyTo (Array array, int idx)
  61                 {
  62                         objectTable.CopyTo (array, idx);
  63                 }
  64
  65                 public void Insert (int idx, object key, object value)
  66                 {
  67                         if (idx > Count)
  68                                 throw new ArgumentOutOfRangeException ("index");
  69
  70                         objectTable.Add (key, value);
  71                         objectList.Insert (idx, new DictionaryEntry (key, value));
  72                 }
  73
  74                 public void Remove (object key)
  75                 {
  76                         objectTable.Remove (key);
  77                         int index = IndexOf (key);
  78                         if (index >= 0)
  79                                 objectList.RemoveAt (index);
  80                 }
  81
  82                 public void RemoveAt (int idx)
  83                 {
  84                         if (idx >= Count)
  85                                 throw new ArgumentOutOfRangeException ("index");
  86
  87                         objectTable.Remove ( ((DictionaryEntry)objectList[idx]).Key );
  88                         objectList.RemoveAt (idx);
  89                 }
  90
  91                 IDictionaryEnumerator IDictionary.GetEnumerator ()
  92                 {
  93                         return new KeyedListEnumerator (objectList);
  94                 }
  95
  96                 IDictionaryEnumerator IOrderedDictionary.GetEnumerator ()
  97                 {
  98                         return new KeyedListEnumerator (objectList);
  99                 }
 100
 101                 IEnumerator IEnumerable.GetEnumerator ()
 102                 {
 103                         return new KeyedListEnumerator (objectList);
 104                 }
 105
 106                 void IStateManager.LoadViewState (object state)
 107                 {
 108                         if (state != null)
 109                         {
 110                                 object[] states = (object[]) state;
 111                                 if (states[0] != null) {
 112                                         objectList = (ArrayList) states[0];
 113                                         for (int i = 0; i < objectList.Count; i++)
 114                                         {
 115                                                 DictionaryEntry pair = (DictionaryEntry) objectList[i];
 116                                                 objectTable.Add (pair.Key, pair.Value);
 117                                         }
 118                                 }
 119                         }
 120                 }
 121
 122                 object IStateManager.SaveViewState ()
 123                 {
 124                         object[] ret = new object[] { objectList };
 125                         if (ret[0] == null)
 126                                 return null;
 127
 128                         return ret;
 129                 }
 130
 131                 void IStateManager.TrackViewState ()
 132                 {
 133                         trackViewState = true;
 134                 }
 135
 136                 public int Count {
 137                         get { return objectList.Count; }
 138                 }
 139
 140                 public bool IsFixedSize {
 141                         get { return false; }
 142                 }
 143
 144                 public bool IsReadOnly {
 145                         get { return false; }
 146                 }
 147
 148                 public bool IsSynchronized {
 149                         get { return false; }
 150                 }
 151
 152                 public object this[int idx] {
 153                         get { return ((DictionaryEntry) objectList[idx]).Value; }
 154                         set {
 155                                 if (idx < 0 || idx >= Count)
 156                                         throw new ArgumentOutOfRangeException ("index");
 157
 158                                 object key = ((DictionaryEntry) objectList[idx]).Key;
 159                                 objectList[idx] = new DictionaryEntry (key, value);
 160                                 objectTable[key] = value;
 161                         }
 162                 }
 163
 164                 public object this[object key] {
 165                         get { return objectTable[key]; }
 166                         set {
 167                                 if (objectTable.Contains (key))
 168                                 {
 169                                         objectTable[key] = value;
 170                                         objectTable[IndexOf (key)] = new DictionaryEntry (key, value);
 171                                         return;
 172                                 }
 173                                 Add (key, value);
 174                         }
 175                 }
 176
 177                 public ICollection Keys {
 178                         get {
 179                                 ArrayList retList = new ArrayList ();
 180                                 for (int i = 0; i < objectList.Count; i++)
 181                                 {
 182                                         retList.Add ( ((DictionaryEntry)objectList[i]).Key );
 183                                 }
 184                                 return retList;
 185                         }
 186                 }
 187
 188                 public ICollection Values {
 189                         get {
 190                                 ArrayList retList = new ArrayList ();
 191                                 for (int i = 0; i < objectList.Count; i++)
 192                                 {
 193                                         retList.Add ( ((DictionaryEntry)objectList[i]).Value );
 194                                 }
 195                                 return retList;
 196                         }
 197                 }
 198
 199                 public object SyncRoot {
 200                         get { return this; }
 201                 }
 202
 203                 private bool trackViewState;
 204
 205                 bool IStateManager.IsTrackingViewState {
 206                         get { return trackViewState; }
 207                 }
 208
 209                 private int IndexOf (object key)
 210                 {
 211                         for (int i = 0; i < objectList.Count; i++)
 212                         {
 213                                 if (((DictionaryEntry) objectList[i]).Key.Equals (key))
 214                                 {
 215                                         return i;
 216                                 }
 217                         }
 218                         return -1;
 219                 }
 220         }
 221 }
 222
 223 #endif