mcs/class/System.Runtime.Remoting/System.Runtime.Remoting.Channels.Http/AggregateDictionary.cs

   1 //\r
   2 // System.Runtime.Remoting.Channels.AggregateDictionary.cs\r
   3 //\r
   4 // Author: Lluis Sanchez Gual (lluis@ximian.com)\r
   5 //\r
   6 // 2002 (C) Copyright, Novell, Inc.\r
   7 //\r
   8 \r
   9 //\r
  10 // Permission is hereby granted, free of charge, to any person obtaining\r
  11 // a copy of this software and associated documentation files (the\r
  12 // "Software"), to deal in the Software without restriction, including\r
  13 // without limitation the rights to use, copy, modify, merge, publish,\r
  14 // distribute, sublicense, and/or sell copies of the Software, and to\r
  15 // permit persons to whom the Software is furnished to do so, subject to\r
  16 // the following conditions:\r
  17 // \r
  18 // The above copyright notice and this permission notice shall be\r
  19 // included in all copies or substantial portions of the Software.\r
  20 // \r
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\r
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\r
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\r
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  28 //\r
  29 \r
  30 using System.Collections;\r
  31 \r
  32 namespace System.Runtime.Remoting.Channels.Http\r
  33 {\r
  34         internal class AggregateDictionary : IDictionary\r
  35         {\r
  36                 IDictionary[] dictionaries;\r
  37                 ArrayList _values;\r
  38                 ArrayList _keys;\r
  39 \r
  40                 public AggregateDictionary (IDictionary[] dics)\r
  41                 {\r
  42                         dictionaries = dics;\r
  43                 }\r
  44 \r
  45                 public bool IsFixedSize\r
  46                 {\r
  47                         get { return true; }\r
  48                 }\r
  49 \r
  50                 public bool IsReadOnly\r
  51                 {\r
  52                         get { return true; }\r
  53                 }\r
  54 \r
  55                 public object this[object key]\r
  56                 {\r
  57                         get\r
  58                         {\r
  59                                 foreach (IDictionary dic in dictionaries)\r
  60                                         if (dic.Contains (key)) return dic[key];\r
  61                                 return null;\r
  62                         }\r
  63 \r
  64                         set\r
  65                         {\r
  66                                 foreach (IDictionary dic in dictionaries)\r
  67                                         if (dic.Contains (key))\r
  68                                                 dic[key] = value;\r
  69                         }\r
  70                 }\r
  71 \r
  72                 public ICollection Keys\r
  73                 {\r
  74                         get\r
  75                         {\r
  76                                 if (_keys != null) return _keys;\r
  77 \r
  78                                 _keys = new ArrayList ();\r
  79                                 foreach (IDictionary dic in dictionaries)\r
  80                                         _keys.AddRange (dic.Keys);\r
  81                                 return _keys;\r
  82                         }\r
  83                 }\r
  84 \r
  85                 public ICollection Values\r
  86                 {\r
  87                         get\r
  88                         {\r
  89                                 if (_values != null) return _values;\r
  90 \r
  91                                 _values = new ArrayList ();\r
  92                                 foreach (IDictionary dic in dictionaries)\r
  93                                         _values.AddRange (dic.Values);\r
  94                                 return _values;\r
  95                         }\r
  96                 }\r
  97 \r
  98                 public void Add (object key, object value)\r
  99                 {\r
 100                         throw new NotSupportedException ();\r
 101                 }\r
 102 \r
 103                 public void Clear ()\r
 104                 {\r
 105                         throw new NotSupportedException ();\r
 106                 }\r
 107 \r
 108                 public bool Contains (object ob)\r
 109                 {\r
 110                         foreach (IDictionary dic in dictionaries)\r
 111                                 if (dic.Contains (ob)) return true;\r
 112                         return false;\r
 113                 }\r
 114 \r
 115                 public IDictionaryEnumerator GetEnumerator ()\r
 116                 {\r
 117                         return new AggregateEnumerator (dictionaries);\r
 118                 }\r
 119 \r
 120                 IEnumerator IEnumerable.GetEnumerator ()\r
 121                 {\r
 122                         return new AggregateEnumerator (dictionaries);\r
 123                 }\r
 124 \r
 125                 public void Remove (object ob)\r
 126                 {\r
 127                         throw new NotSupportedException ();\r
 128                 }\r
 129 \r
 130                 public void CopyTo (Array array, int index)\r
 131                 {\r
 132                         foreach (object ob in this)\r
 133                                 array.SetValue (ob, index++);\r
 134                 }\r
 135 \r
 136                 public int Count\r
 137                 {\r
 138                         get\r
 139                         {\r
 140                                 int c = 0;\r
 141                                 foreach (IDictionary dic in dictionaries)\r
 142                                         c += dic.Count;\r
 143                                 return c;\r
 144                         }\r
 145                 }\r
 146 \r
 147                 public bool IsSynchronized\r
 148                 {\r
 149                         get { return false; }\r
 150                 }\r
 151 \r
 152                 public object SyncRoot\r
 153                 {\r
 154                         get { return this; }\r
 155                 }\r
 156         }\r
 157 \r
 158         internal class AggregateEnumerator : IDictionaryEnumerator\r
 159         {\r
 160                 IDictionary[] dictionaries;\r
 161                 int pos = 0;\r
 162                 IDictionaryEnumerator currente;\r
 163 \r
 164                 public AggregateEnumerator (IDictionary[] dics)\r
 165                 {\r
 166                         dictionaries = dics;\r
 167                         Reset ();\r
 168                 }\r
 169 \r
 170                 public DictionaryEntry Entry\r
 171                 {\r
 172                         get { return currente.Entry; }\r
 173                 }\r
 174 \r
 175                 public object Key\r
 176                 {\r
 177                         get { return currente.Key; }\r
 178                 }\r
 179 \r
 180                 public object Value\r
 181                 {\r
 182                         get { return currente.Value; }\r
 183                 }\r
 184 \r
 185                 public object Current\r
 186                 {\r
 187                         get { return currente.Current; }\r
 188                 }\r
 189 \r
 190                 public bool MoveNext ()\r
 191                 {\r
 192                         if (pos >= dictionaries.Length) return false;\r
 193 \r
 194                         if (!currente.MoveNext ()) {\r
 195                                 pos++;\r
 196                                 if (pos >= dictionaries.Length) return false;\r
 197                                 currente = dictionaries[pos].GetEnumerator ();\r
 198                                 return MoveNext ();\r
 199                         }\r
 200 \r
 201                         return true;\r
 202                 }\r
 203 \r
 204                 public void Reset ()\r
 205                 {\r
 206                         pos = 0;\r
 207                         if (dictionaries.Length > 0)\r
 208                                 currente = dictionaries[0].GetEnumerator ();\r
 209                 }\r
 210         }\r
 211 }\r