mcs/class/corlib/System.Resources/ResourceSet.cs

   1 //
   2 // System.Resources.ResourceSet.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Dick Porter (dick@ximian.com)
   7 //      Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   8 //
   9 // (C) 2001, 2002 Ximian, Inc.          http://www.ximian.com
  10 //
  11
  12 //
  13 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System.Collections;
  36 using System.IO;
  37 using System.Globalization;
  38 using System.Runtime.InteropServices;
  39
  40 namespace System.Resources
  41 {
  42         [Serializable]
  43         public class ResourceSet : IDisposable
  44
  45 #if (NET_1_1)
  46                                                 , IEnumerable
  47 #endif
  48
  49         {
  50
  51                 protected IResourceReader Reader;
  52                 protected Hashtable Table;
  53
  54                 // Constructors
  55                 protected ResourceSet () {}
  56
  57                 public ResourceSet (IResourceReader reader)
  58                 {
  59                         if (reader == null)
  60                                 throw new ArgumentNullException ("The reader is null.");
  61                         Reader = reader;
  62                 }
  63
  64                 public ResourceSet (Stream stream)
  65                 {
  66                         if(stream==null) {
  67                                 throw new ArgumentNullException("stream is null");
  68                         }
  69
  70                         if(!stream.CanRead) {
  71                                 throw new ArgumentException("stream is not readable");
  72                         }
  73
  74                         Reader = new ResourceReader (stream);
  75                 }
  76
  77                 public ResourceSet (String fileName)
  78                 {
  79                         if(fileName==null) {
  80                                 throw new ArgumentNullException("filename is null");
  81                         }
  82
  83                         Reader = new ResourceReader (fileName);
  84                 }
  85
  86                 public virtual void Close ()
  87                 {
  88                         Dispose (true);
  89                 }
  90
  91                 public void Dispose()
  92                 {
  93                         Dispose (true);
  94                 }
  95
  96                 protected virtual void Dispose (bool disposing)
  97                 {
  98                         if (disposing) {
  99                                 if(Reader!=null) {
 100                                         Reader.Close();
 101                                 }
 102                         }
 103
 104                         Reader = null;
 105                         Table = null;
 106                 }
 107
 108                 public virtual Type GetDefaultReader ()
 109                 {
 110                         return (typeof (ResourceReader));
 111                 }
 112                 public virtual Type GetDefaultWriter ()
 113                 {
 114                         return (typeof (ResourceWriter));
 115                 }
 116
 117 #if (NET_1_1)
 118
 119                 [ComVisible (false)]
 120                 public virtual IDictionaryEnumerator GetEnumerator ()
 121                 {
 122                         if (Table == null)
 123                                 ReadResources ();
 124                         return Table.GetEnumerator();
 125                 }
 126
 127                 IEnumerator IEnumerable.GetEnumerator ()
 128                 {
 129                         return this.GetEnumerator ();
 130                 }
 131
 132 #endif
 133
 134                 public virtual object GetObject (string name)
 135                 {
 136                         if (name == null)
 137                                 throw new ArgumentNullException ("The name parameter is null.");
 138                         if (Reader == null)
 139                                 throw new InvalidOperationException ("The ResourceSet has been closed.");
 140
 141                         if (Table == null) {
 142                                 ReadResources ();
 143                         }
 144
 145                         return(Table[name]);
 146                 }
 147
 148                 public virtual object GetObject (string name, bool ignoreCase)
 149                 {
 150                         if (name == null)
 151                                 throw new ArgumentNullException ("The name parameter is null.");
 152                         if (Reader == null)
 153                                 throw new InvalidOperationException ("ResourceSet has been closed.");
 154                         if (Table == null)
 155                                 ReadResources ();
 156
 157                         if (ignoreCase) {
 158                                 foreach (DictionaryEntry de in Table) {
 159                                         string key = (string) de.Key;
 160                                         if (String.Compare (key, name, true, CultureInfo.InvariantCulture) == 0)
 161                                                 return de.Value;
 162                                 }
 163                                 return null;
 164                         } else
 165                                 return Table[name];
 166                 }
 167
 168                 public virtual string GetString (string name)
 169                 {
 170                         Object o = GetObject (name);
 171                         if (o == null)
 172                                 return null;
 173                         if (o is string)
 174                                 return (string) o;
 175                         throw new InvalidOperationException("Not a string");
 176                 }
 177
 178                 public virtual string GetString (string name, bool ignoreCase)
 179                 {
 180                         Object o = GetObject (name, ignoreCase);
 181                         if (o == null)
 182                                 return null;
 183                         if (o is string)
 184                                 return (string) o;
 185                         throw new InvalidOperationException("Not a string");
 186                 }
 187
 188                 protected virtual void ReadResources ()
 189                 {
 190                         if (Reader == null)
 191                                 throw new InvalidOperationException ("ResourceSet is closed.");
 192
 193                         IDictionaryEnumerator i = Reader.GetEnumerator();
 194
 195                         if (Table == null)
 196                                 Table = new Hashtable ();
 197                         i.Reset ();
 198
 199                         while (i.MoveNext ())
 200                                 Table.Add (i.Key, i.Value);
 201                 }
 202         }
 203 }