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 using System.Collections;
  30 using System.Collections.Specialized;
  31
  32 namespace System.Web.UI
  33 {
  34
  35         internal class KeyedList : IOrderedDictionary, IStateManager
  36         {
  37
  38                 Hashtable objectTable = new Hashtable ();
  39                 ArrayList objectList = new ArrayList ();
  40
  41                 public void Add (object key, object value)
  42                 {
  43                         objectTable.Add (key, value);
  44                         objectList.Add (new DictionaryEntry (key, value));
  45                 }
  46
  47                 public void Clear ()
  48                 {
  49                         objectTable.Clear ();
  50                         objectList.Clear ();
  51                 }
  52
  53                 public bool Contains (object key)
  54                 {
  55                         return objectTable.Contains (key);
  56                 }
  57
  58                 public void CopyTo (Array array, int idx)
  59                 {
  60                         objectTable.CopyTo (array, idx);
  61                 }
  62
  63                 public void Insert (int idx, object key, object value)
  64                 {
  65                         if (idx > Count)
  66                                 throw new ArgumentOutOfRangeException ("index");
  67
  68                         objectTable.Add (key, value);
  69                         objectList.Insert (idx, new DictionaryEntry (key, value));
  70                 }
  71
  72                 public void Remove (object key)
  73                 {
  74                         objectTable.Remove (key);
  75                         int index = IndexOf (key);
  76                         if (index >= 0)
  77                                 objectList.RemoveAt (index);
  78                 }
  79
  80                 public void RemoveAt (int idx)
  81                 {
  82                         if (idx >= Count)
  83                                 throw new ArgumentOutOfRangeException ("index");
  84
  85                         objectTable.Remove ( ((DictionaryEntry)objectList[idx]).Key );
  86                         objectList.RemoveAt (idx);
  87                 }
  88
  89                 IDictionaryEnumerator IDictionary.GetEnumerator ()
  90                 {
  91                         return new KeyedListEnumerator (objectList);
  92                 }
  93
  94                 IDictionaryEnumerator IOrderedDictionary.GetEnumerator ()
  95                 {
  96                         return new KeyedListEnumerator (objectList);
  97                 }
  98
  99                 IEnumerator IEnumerable.GetEnumerator ()
 100                 {
 101                         return new KeyedListEnumerator (objectList);
 102                 }
 103
 104                 void IStateManager.LoadViewState (object state)
 105                 {
 106                         if (state != null)
 107                         {
 108                                 object[] states = (object[]) state;
 109                                 if (states[0] != null) {
 110                                         objectList = (ArrayList) states[0];
 111                                         for (int i = 0; i < objectList.Count; i++)
 112                                         {
 113                                                 DictionaryEntry pair = (DictionaryEntry) objectList[i];
 114                                                 objectTable.Add (pair.Key, pair.Value);
 115                                         }
 116                                 }
 117                         }
 118                 }
 119
 120                 object IStateManager.SaveViewState ()
 121                 {
 122                         object[] ret = new object[] { objectList };
 123                         if (ret[0] == null)
 124                                 return null;
 125
 126                         return ret;
 127                 }
 128
 129                 void IStateManager.TrackViewState ()
 130                 {
 131                         trackViewState = true;
 132                 }
 133
 134                 public int Count {
 135                         get { return objectList.Count; }
 136                 }
 137
 138                 public bool IsFixedSize {
 139                         get { return false; }
 140                 }
 141
 142                 public bool IsReadOnly {
 143                         get { return false; }
 144                 }
 145
 146                 public bool IsSynchronized {
 147                         get { return false; }
 148                 }
 149
 150                 public object this[int idx] {
 151                         get { return ((DictionaryEntry) objectList[idx]).Value; }
 152                         set {
 153                                 if (idx < 0 || idx >= Count)
 154                                         throw new ArgumentOutOfRangeException ("index");
 155
 156                                 object key = ((DictionaryEntry) objectList[idx]).Key;
 157                                 objectList[idx] = new DictionaryEntry (key, value);
 158                                 objectTable[key] = value;
 159                         }
 160                 }
 161
 162                 public object this[object key] {
 163                         get { return objectTable[key]; }
 164                         set {
 165                                 if (objectTable.Contains (key))
 166                                 {
 167                                         objectTable[key] = value;
 168                                         objectTable[IndexOf (key)] = new DictionaryEntry (key, value);
 169                                         return;
 170                                 }
 171                                 Add (key, value);
 172                         }
 173                 }
 174
 175                 public ICollection Keys {
 176                         get {
 177                                 ArrayList retList = new ArrayList ();
 178                                 for (int i = 0; i < objectList.Count; i++)
 179                                 {
 180                                         retList.Add ( ((DictionaryEntry)objectList[i]).Key );
 181                                 }
 182                                 return retList;
 183                         }
 184                 }
 185
 186                 public ICollection Values {
 187                         get {
 188                                 ArrayList retList = new ArrayList ();
 189                                 for (int i = 0; i < objectList.Count; i++)
 190                                 {
 191                                         retList.Add ( ((DictionaryEntry)objectList[i]).Value );
 192                                 }
 193                                 return retList;
 194                         }
 195                 }
 196
 197                 public object SyncRoot {
 198                         get { return this; }
 199                 }
 200
 201                 bool trackViewState;
 202
 203                 bool IStateManager.IsTrackingViewState {
 204                         get { return trackViewState; }
 205                 }
 206
 207                 int IndexOf (object key)
 208                 {
 209                         for (int i = 0; i < objectList.Count; i++)
 210                         {
 211                                 if (((DictionaryEntry) objectList[i]).Key.Equals (key))
 212                                 {
 213                                         return i;
 214                                 }
 215                         }
 216                         return -1;
 217                 }
 218         }
 219 }