mcs/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                                 throw new NotSupportedException ();
  67                         }
  68                 }
  69
  70                 public ICollection Keys
  71                 {
  72                         get
  73                         {
  74                                 if (_keys != null) return _keys;
  75
  76                                 _keys = new ArrayList ();
  77                                 foreach (IDictionary dic in dictionaries)
  78                                         _keys.AddRange (dic.Keys);
  79                                 return _keys;
  80                         }
  81                 }
  82
  83                 public ICollection Values
  84                 {
  85                         get
  86                         {
  87                                 if (_values != null) return _values;
  88
  89                                 _values = new ArrayList ();
  90                                 foreach (IDictionary dic in dictionaries)
  91                                         _values.AddRange (dic.Values);
  92                                 return _values;
  93                         }
  94                 }
  95
  96                 public void Add (object key, object value)
  97                 {
  98                         throw new NotSupportedException ();
  99                 }
 100
 101                 public void Clear ()
 102                 {
 103                         throw new NotSupportedException ();
 104                 }
 105
 106                 public bool Contains (object ob)
 107                 {
 108                         foreach (IDictionary dic in dictionaries)
 109                                 if (dic.Contains (ob)) return true;
 110                         return false;
 111                 }
 112
 113                 public IDictionaryEnumerator GetEnumerator ()
 114                 {
 115                         return new AggregateEnumerator (dictionaries);
 116                 }
 117
 118                 IEnumerator IEnumerable.GetEnumerator ()
 119                 {
 120                         return new AggregateEnumerator (dictionaries);
 121                 }
 122
 123                 public void Remove (object ob)
 124                 {
 125                         throw new NotSupportedException ();
 126                 }
 127
 128                 public void CopyTo (Array array, int index)
 129                 {
 130                         foreach (object ob in this)
 131                                 array.SetValue (ob, index++);
 132                 }
 133
 134                 public int Count
 135                 {
 136                         get
 137                         {
 138                                 int c = 0;
 139                                 foreach (IDictionary dic in dictionaries)
 140                                         c += dic.Count;
 141                                 return c;
 142                         }
 143                 }
 144
 145                 public bool IsSynchronized
 146                 {
 147                         get { return false; }
 148                 }
 149
 150                 public object SyncRoot
 151                 {
 152                         get { return this; }
 153                 }
 154         }
 155
 156         internal class AggregateEnumerator: IDictionaryEnumerator
 157         {
 158                 IDictionary[] dictionaries;
 159                 int pos = 0;
 160                 IDictionaryEnumerator currente;
 161
 162                 public AggregateEnumerator (IDictionary[] dics)
 163                 {
 164                         dictionaries = dics;
 165                         Reset ();
 166                 }
 167
 168                 public DictionaryEntry Entry
 169                 {
 170                         get { return currente.Entry; }
 171                 }
 172
 173                 public object Key
 174                 {
 175                         get { return currente.Key; }
 176                 }
 177
 178                 public object Value
 179                 {
 180                         get { return currente.Value; }
 181                 }
 182
 183                 public object Current
 184                 {
 185                         get { return currente.Current; }
 186                 }
 187
 188                 public bool MoveNext ()
 189                 {
 190                         if (pos >= dictionaries.Length) return false;
 191
 192                         if (!currente.MoveNext())
 193                         {
 194                                 pos++;
 195                                 if (pos >= dictionaries.Length) return false;
 196                                 currente = dictionaries [pos].GetEnumerator ();
 197                                 return MoveNext ();
 198                         }
 199
 200                         return true;
 201                 }
 202
 203                 public void Reset ()
 204                 {
 205                         pos = 0;
 206                         if (dictionaries.Length > 0)
 207                                 currente = dictionaries [0].GetEnumerator ();
 208                 }
 209         }
 210 }