mcs/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 #if NET_2_0
  37         [System.Runtime.InteropServices.ComVisible (true)]
  38 #endif
  39         internal class AggregateDictionary: IDictionary
  40         {
  41                 IDictionary[] dictionaries;
  42                 ArrayList _values;
  43                 ArrayList _keys;
  44
  45                 public AggregateDictionary (IDictionary[] dics)
  46                 {
  47                         dictionaries = dics;
  48                 }
  49
  50                 public bool IsFixedSize
  51                 {
  52                         get { return true; }
  53                 }
  54
  55                 public bool IsReadOnly
  56                 {
  57                         get { return true; }
  58                 }
  59
  60                 public object this [object key]
  61                 {
  62                         get
  63                         {
  64                                 foreach (IDictionary dic in dictionaries)
  65                                         if (dic.Contains (key)) return dic [key];
  66                                 return null;
  67                         }
  68
  69                         set
  70                         {
  71                                 throw new NotSupportedException ();
  72                         }
  73                 }
  74
  75                 public ICollection Keys
  76                 {
  77                         get
  78                         {
  79                                 if (_keys != null) return _keys;
  80
  81                                 _keys = new ArrayList ();
  82                                 foreach (IDictionary dic in dictionaries)
  83                                         _keys.AddRange (dic.Keys);
  84                                 return _keys;
  85                         }
  86                 }
  87
  88                 public ICollection Values
  89                 {
  90                         get
  91                         {
  92                                 if (_values != null) return _values;
  93
  94                                 _values = new ArrayList ();
  95                                 foreach (IDictionary dic in dictionaries)
  96                                         _values.AddRange (dic.Values);
  97                                 return _values;
  98                         }
  99                 }
 100
 101                 public void Add (object key, object value)
 102                 {
 103                         throw new NotSupportedException ();
 104                 }
 105
 106                 public void Clear ()
 107                 {
 108                         throw new NotSupportedException ();
 109                 }
 110
 111                 public bool Contains (object ob)
 112                 {
 113                         foreach (IDictionary dic in dictionaries)
 114                                 if (dic.Contains (ob)) return true;
 115                         return false;
 116                 }
 117
 118                 public IDictionaryEnumerator GetEnumerator ()
 119                 {
 120                         return new AggregateEnumerator (dictionaries);
 121                 }
 122
 123                 IEnumerator IEnumerable.GetEnumerator ()
 124                 {
 125                         return new AggregateEnumerator (dictionaries);
 126                 }
 127
 128                 public void Remove (object ob)
 129                 {
 130                         throw new NotSupportedException ();
 131                 }
 132
 133                 public void CopyTo (Array array, int index)
 134                 {
 135                         foreach (object ob in this)
 136                                 array.SetValue (ob, index++);
 137                 }
 138
 139                 public int Count
 140                 {
 141                         get
 142                         {
 143                                 int c = 0;
 144                                 foreach (IDictionary dic in dictionaries)
 145                                         c += dic.Count;
 146                                 return c;
 147                         }
 148                 }
 149
 150                 public bool IsSynchronized
 151                 {
 152                         get { return false; }
 153                 }
 154
 155                 public object SyncRoot
 156                 {
 157                         get { return this; }
 158                 }
 159         }
 160
 161         internal class AggregateEnumerator: IDictionaryEnumerator
 162         {
 163                 IDictionary[] dictionaries;
 164                 int pos = 0;
 165                 IDictionaryEnumerator currente;
 166
 167                 public AggregateEnumerator (IDictionary[] dics)
 168                 {
 169                         dictionaries = dics;
 170                         Reset ();
 171                 }
 172
 173                 public DictionaryEntry Entry
 174                 {
 175                         get { return currente.Entry; }
 176                 }
 177
 178                 public object Key
 179                 {
 180                         get { return currente.Key; }
 181                 }
 182
 183                 public object Value
 184                 {
 185                         get { return currente.Value; }
 186                 }
 187
 188                 public object Current
 189                 {
 190                         get { return currente.Current; }
 191                 }
 192
 193                 public bool MoveNext ()
 194                 {
 195                         if (pos >= dictionaries.Length) return false;
 196
 197                         if (!currente.MoveNext())
 198                         {
 199                                 pos++;
 200                                 if (pos >= dictionaries.Length) return false;
 201                                 currente = dictionaries [pos].GetEnumerator ();
 202                                 return MoveNext ();
 203                         }
 204
 205                         return true;
 206                 }
 207
 208                 public void Reset ()
 209                 {
 210                         pos = 0;
 211                         if (dictionaries.Length > 0)
 212                                 currente = dictionaries [0].GetEnumerator ();
 213                 }
 214         }
 215 }