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 #if NET_1_2
   9
  10 using System.Collections;
  11 using System.Collections.Specialized;
  12
  13 namespace System.Web.UI
  14 {
  15
  16         public class KeyedList : IOrderedDictionary, IStateManager
  17         {
  18
  19                 private Hashtable objectTable = new Hashtable ();
  20                 private ArrayList objectList = new ArrayList ();
  21
  22                 public void Add (object key, object value)
  23                 {
  24                         objectTable.Add (key, value);
  25                         objectList.Add (new DictionaryEntry (key, value));
  26                 }
  27
  28                 public void Clear ()
  29                 {
  30                         objectTable.Clear ();
  31                         objectList.Clear ();
  32                 }
  33
  34                 public bool Contains (object key)
  35                 {
  36                         return objectTable.Contains (key);
  37                 }
  38
  39                 public void CopyTo (Array array, int idx)
  40                 {
  41                         objectTable.CopyTo (array, idx);
  42                 }
  43
  44                 public void Insert (int idx, object key, object value)
  45                 {
  46                         if (idx > Count)
  47                                 throw new ArgumentOutOfRangeException ("index");
  48
  49                         objectTable.Add (key, value);
  50                         objectList.Insert (idx, new DictionaryEntry (key, value));
  51                 }
  52
  53                 public void Remove (object key)
  54                 {
  55                         objectTable.Remove (key);
  56                         objectList.RemoveAt (IndexOf (key));
  57                 }
  58
  59                 public void RemoveAt (int idx)
  60                 {
  61                         if (idx >= Count)
  62                                 throw new ArgumentOutOfRangeException ("index");
  63
  64                         objectTable.Remove ( ((DictionaryEntry)objectList[idx]).Key );
  65                         objectList.RemoveAt (idx);
  66                 }
  67
  68                 IDictionaryEnumerator IDictionary.GetEnumerator ()
  69                 {
  70                         return new KeyedListEnumerator (objectList);
  71                 }
  72
  73                 IEnumerator IEnumerable.GetEnumerator ()
  74                 {
  75                         return new KeyedListEnumerator (objectList);
  76                 }
  77
  78                 void IStateManager.LoadViewState (object state)
  79                 {
  80                         if (state != null)
  81                         {
  82                                 object[] states = (object[]) state;
  83                                 if (states[0] != null) {
  84                                         objectList = (ArrayList) states[0];
  85                                         for (int i = 0; i < objectList.Count; i++)
  86                                         {
  87                                                 DictionaryEntry pair = (DictionaryEntry) objectList[i];
  88                                                 objectTable.Add (pair.Key, pair.Value);
  89                                         }
  90                                 }
  91                         }
  92                 }
  93
  94                 object IStateManager.SaveViewState ()
  95                 {
  96                         object[] ret = new object[] { objectList };
  97                         if (ret[0] == null)
  98                                 return null;
  99
 100                         return ret;
 101                 }
 102
 103                 void IStateManager.TrackViewState ()
 104                 {
 105                         trackViewState = true;
 106                 }
 107
 108                 public int Count {
 109                         get { return objectList.Count; }
 110                 }
 111
 112                 public bool IsFixedSize {
 113                         get { return false; }
 114                 }
 115
 116                 public bool IsReadOnly {
 117                         get { return false; }
 118                 }
 119
 120                 public bool IsSynchronized {
 121                         get { return false; }
 122                 }
 123
 124                 public object this[int idx] {
 125                         get { return ((DictionaryEntry) objectList[idx]).Value; }
 126                         set {
 127                                 if (idx < 0 || idx >= Count)
 128                                         throw new ArgumentOutOfRangeException ("index");
 129
 130                                 object key = ((DictionaryEntry) objectList[idx]).Key;
 131                                 objectList[idx] = new DictionaryEntry (key, value);
 132                                 objectTable[key] = value;
 133                         }
 134                 }
 135
 136                 public object this[object key] {
 137                         get { return objectTable[key]; }
 138                         set {
 139                                 if (objectTable.Contains (key))
 140                                 {
 141                                         objectTable[key] = value;
 142                                         objectTable[IndexOf (key)] = new DictionaryEntry (key, value);
 143                                         return;
 144                                 }
 145                                 Add (key, value);
 146                         }
 147                 }
 148
 149                 public ICollection Keys {
 150                         get {
 151                                 ArrayList retList = new ArrayList ();
 152                                 for (int i = 0; i < objectList.Count; i++)
 153                                 {
 154                                         retList.Add ( ((DictionaryEntry)objectList[i]).Key );
 155                                 }
 156                                 return retList;
 157                         }
 158                 }
 159
 160                 public ICollection Values {
 161                         get {
 162                                 ArrayList retList = new ArrayList ();
 163                                 for (int i = 0; i < objectList.Count; i++)
 164                                 {
 165                                         retList.Add ( ((DictionaryEntry)objectList[i]).Value );
 166                                 }
 167                                 return retList;
 168                         }
 169                 }
 170
 171                 public object SyncRoot {
 172                         get { return this; }
 173                 }
 174
 175                 private bool trackViewState;
 176
 177                 bool IStateManager.IsTrackingViewState {
 178                         get { return trackViewState; }
 179                 }
 180
 181                 private int IndexOf (object key)
 182                 {
 183                         for (int i = 0; i < objectList.Count; i++)
 184                         {
 185                                 if (((DictionaryEntry) objectList[i]).Key.Equals (key))
 186                                 {
 187                                         return i;
 188                                 }
 189                         }
 190                         return -1;
 191                 }
 192         }
 193 }
 194
 195 #endif