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         public 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                         objectList.RemoveAt (IndexOf (key));
  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                 IEnumerator IEnumerable.GetEnumerator ()
  95                 {
  96                         return new KeyedListEnumerator (objectList);
  97                 }
  98
  99                 void IStateManager.LoadViewState (object state)
 100                 {
 101                         if (state != null)
 102                         {
 103                                 object[] states = (object[]) state;
 104                                 if (states[0] != null) {
 105                                         objectList = (ArrayList) states[0];
 106                                         for (int i = 0; i < objectList.Count; i++)
 107                                         {
 108                                                 DictionaryEntry pair = (DictionaryEntry) objectList[i];
 109                                                 objectTable.Add (pair.Key, pair.Value);
 110                                         }
 111                                 }
 112                         }
 113                 }
 114
 115                 object IStateManager.SaveViewState ()
 116                 {
 117                         object[] ret = new object[] { objectList };
 118                         if (ret[0] == null)
 119                                 return null;
 120
 121                         return ret;
 122                 }
 123
 124                 void IStateManager.TrackViewState ()
 125                 {
 126                         trackViewState = true;
 127                 }
 128
 129                 public int Count {
 130                         get { return objectList.Count; }
 131                 }
 132
 133                 public bool IsFixedSize {
 134                         get { return false; }
 135                 }
 136
 137                 public bool IsReadOnly {
 138                         get { return false; }
 139                 }
 140
 141                 public bool IsSynchronized {
 142                         get { return false; }
 143                 }
 144
 145                 public object this[int idx] {
 146                         get { return ((DictionaryEntry) objectList[idx]).Value; }
 147                         set {
 148                                 if (idx < 0 || idx >= Count)
 149                                         throw new ArgumentOutOfRangeException ("index");
 150
 151                                 object key = ((DictionaryEntry) objectList[idx]).Key;
 152                                 objectList[idx] = new DictionaryEntry (key, value);
 153                                 objectTable[key] = value;
 154                         }
 155                 }
 156
 157                 public object this[object key] {
 158                         get { return objectTable[key]; }
 159                         set {
 160                                 if (objectTable.Contains (key))
 161                                 {
 162                                         objectTable[key] = value;
 163                                         objectTable[IndexOf (key)] = new DictionaryEntry (key, value);
 164                                         return;
 165                                 }
 166                                 Add (key, value);
 167                         }
 168                 }
 169
 170                 public ICollection Keys {
 171                         get {
 172                                 ArrayList retList = new ArrayList ();
 173                                 for (int i = 0; i < objectList.Count; i++)
 174                                 {
 175                                         retList.Add ( ((DictionaryEntry)objectList[i]).Key );
 176                                 }
 177                                 return retList;
 178                         }
 179                 }
 180
 181                 public ICollection Values {
 182                         get {
 183                                 ArrayList retList = new ArrayList ();
 184                                 for (int i = 0; i < objectList.Count; i++)
 185                                 {
 186                                         retList.Add ( ((DictionaryEntry)objectList[i]).Value );
 187                                 }
 188                                 return retList;
 189                         }
 190                 }
 191
 192                 public object SyncRoot {
 193                         get { return this; }
 194                 }
 195
 196                 private bool trackViewState;
 197
 198                 bool IStateManager.IsTrackingViewState {
 199                         get { return trackViewState; }
 200                 }
 201
 202                 private int IndexOf (object key)
 203                 {
 204                         for (int i = 0; i < objectList.Count; i++)
 205                         {
 206                                 if (((DictionaryEntry) objectList[i]).Key.Equals (key))
 207                                 {
 208                                         return i;
 209                                 }
 210                         }
 211                         return -1;
 212                 }
 213         }
 214 }
 215
 216 #endif