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

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