class/corlib/System.Runtime.Remoting.Channels/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 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Collections;
  33
  34 namespace System.Runtime.Remoting.Channels
  35 {
  36         [System.Runtime.InteropServices.ComVisible (true)]
  37         internal class AggregateDictionary: IDictionary
  38         {
  39                 IDictionary[] dictionaries;
  40                 ArrayList _values;
  41                 ArrayList _keys;
  42
  43                 public AggregateDictionary (IDictionary[] dics)
  44                 {
  45                         dictionaries = dics;
  46                 }
  47
  48                 public bool IsFixedSize
  49                 {
  50                         get { return true; }
  51                 }
  52
  53                 public bool IsReadOnly
  54                 {
  55                         get { return true; }
  56                 }
  57
  58                 public object this [object key]
  59                 {
  60                         get
  61                         {
  62                                 foreach (IDictionary dic in dictionaries)
  63                                         if (dic.Contains (key)) return dic [key];
  64                                 return null;
  65                         }
  66
  67                         set
  68                         {
  69                                 throw new NotSupportedException ();
  70                         }
  71                 }
  72
  73                 public ICollection Keys
  74                 {
  75                         get
  76                         {
  77                                 if (_keys != null) return _keys;
  78
  79                                 _keys = new ArrayList ();
  80                                 foreach (IDictionary dic in dictionaries)
  81                                         _keys.AddRange (dic.Keys);
  82                                 return _keys;
  83                         }
  84                 }
  85
  86                 public ICollection Values
  87                 {
  88                         get
  89                         {
  90                                 if (_values != null) return _values;
  91
  92                                 _values = new ArrayList ();
  93                                 foreach (IDictionary dic in dictionaries)
  94                                         _values.AddRange (dic.Values);
  95                                 return _values;
  96                         }
  97                 }
  98
  99                 public void Add (object key, object value)
 100                 {
 101                         throw new NotSupportedException ();
 102                 }
 103
 104                 public void Clear ()
 105                 {
 106                         throw new NotSupportedException ();
 107                 }
 108
 109                 public bool Contains (object ob)
 110                 {
 111                         foreach (IDictionary dic in dictionaries)
 112                                 if (dic.Contains (ob)) return true;
 113                         return false;
 114                 }
 115
 116                 public IDictionaryEnumerator GetEnumerator ()
 117                 {
 118                         return new AggregateEnumerator (dictionaries);
 119                 }
 120
 121                 IEnumerator IEnumerable.GetEnumerator ()
 122                 {
 123                         return new AggregateEnumerator (dictionaries);
 124                 }
 125
 126                 public void Remove (object ob)
 127                 {
 128                         throw new NotSupportedException ();
 129                 }
 130
 131                 public void CopyTo (Array array, int index)
 132                 {
 133                         foreach (object ob in this)
 134                                 array.SetValue (ob, index++);
 135                 }
 136
 137                 public int Count
 138                 {
 139                         get
 140                         {
 141                                 int c = 0;
 142                                 foreach (IDictionary dic in dictionaries)
 143                                         c += dic.Count;
 144                                 return c;
 145                         }
 146                 }
 147
 148                 public bool IsSynchronized
 149                 {
 150                         get { return false; }
 151                 }
 152
 153                 public object SyncRoot
 154                 {
 155                         get { return this; }
 156                 }
 157         }
 158
 159         internal class AggregateEnumerator: IDictionaryEnumerator
 160         {
 161                 IDictionary[] dictionaries;
 162                 int pos = 0;
 163                 IDictionaryEnumerator currente;
 164
 165                 public AggregateEnumerator (IDictionary[] dics)
 166                 {
 167                         dictionaries = dics;
 168                         Reset ();
 169                 }
 170
 171                 public DictionaryEntry Entry
 172                 {
 173                         get { return currente.Entry; }
 174                 }
 175
 176                 public object Key
 177                 {
 178                         get { return currente.Key; }
 179                 }
 180
 181                 public object Value
 182                 {
 183                         get { return currente.Value; }
 184                 }
 185
 186                 public object Current
 187                 {
 188                         get { return currente.Current; }
 189                 }
 190
 191                 public bool MoveNext ()
 192                 {
 193                         if (pos >= dictionaries.Length) return false;
 194
 195                         if (!currente.MoveNext())
 196                         {
 197                                 pos++;
 198                                 if (pos >= dictionaries.Length) return false;
 199                                 currente = dictionaries [pos].GetEnumerator ();
 200                                 return MoveNext ();
 201                         }
 202
 203                         return true;
 204                 }
 205
 206                 public void Reset ()
 207                 {
 208                         pos = 0;
 209                         if (dictionaries.Length > 0)
 210                                 currente = dictionaries [0].GetEnumerator ();
 211                 }
 212         }
 213 }