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 // Copyright (C) 2004-2005 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 using System.IO;
  34 using System.Globalization;
  35 using System.Runtime.InteropServices;
  36 using System.Security.Permissions;
  37
  38 namespace System.Resources
  39 {
  40         [Serializable]
  41         public class ResourceSet : IDisposable
  42
  43 #if (NET_1_1)
  44                                                 , IEnumerable
  45 #endif
  46
  47         {
  48
  49                 protected IResourceReader Reader;
  50                 protected Hashtable Table;
  51
  52                 // Constructors
  53                 protected ResourceSet () {}
  54
  55                 public ResourceSet (IResourceReader reader)
  56                 {
  57                         if (reader == null)
  58                                 throw new ArgumentNullException ("The reader is null.");
  59                         Reader = reader;
  60                 }
  61
  62                 [SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
  63                 public ResourceSet (Stream stream)
  64                 {
  65                         if(stream==null) {
  66                                 throw new ArgumentNullException("stream is null");
  67                         }
  68
  69                         if(!stream.CanRead) {
  70                                 throw new ArgumentException("stream is not readable");
  71                         }
  72
  73                         Reader = new ResourceReader (stream);
  74                 }
  75
  76                 public ResourceSet (String fileName)
  77                 {
  78                         if(fileName==null) {
  79                                 throw new ArgumentNullException("filename is null");
  80                         }
  81
  82                         Reader = new ResourceReader (fileName);
  83                 }
  84
  85                 public virtual void Close ()
  86                 {
  87                         Dispose (true);
  88                 }
  89
  90                 public void Dispose()
  91                 {
  92                         Dispose (true);
  93                 }
  94
  95                 protected virtual void Dispose (bool disposing)
  96                 {
  97                         if (disposing) {
  98                                 if(Reader!=null) {
  99                                         Reader.Close();
 100                                 }
 101                         }
 102
 103                         Reader = null;
 104                         Table = null;
 105                 }
 106
 107                 public virtual Type GetDefaultReader ()
 108                 {
 109                         return (typeof (ResourceReader));
 110                 }
 111                 public virtual Type GetDefaultWriter ()
 112                 {
 113                         return (typeof (ResourceWriter));
 114                 }
 115
 116 #if (NET_1_1)
 117
 118                 [ComVisible (false)]
 119                 public virtual IDictionaryEnumerator GetEnumerator ()
 120                 {
 121                         if (Table == null)
 122                                 ReadResources ();
 123                         return Table.GetEnumerator();
 124                 }
 125
 126                 IEnumerator IEnumerable.GetEnumerator ()
 127                 {
 128                         return this.GetEnumerator ();
 129                 }
 130
 131 #endif
 132
 133                 public virtual object GetObject (string name)
 134                 {
 135                         if (name == null)
 136                                 throw new ArgumentNullException ("The name parameter is null.");
 137                         if (Reader == null)
 138                                 throw new InvalidOperationException ("The ResourceSet has been closed.");
 139
 140                         if (Table == null) {
 141                                 ReadResources ();
 142                         }
 143
 144                         return(Table[name]);
 145                 }
 146
 147                 public virtual object GetObject (string name, bool ignoreCase)
 148                 {
 149                         if (name == null)
 150                                 throw new ArgumentNullException ("The name parameter is null.");
 151                         if (Reader == null)
 152                                 throw new InvalidOperationException ("ResourceSet has been closed.");
 153                         if (Table == null)
 154                                 ReadResources ();
 155
 156                         if (ignoreCase) {
 157                                 foreach (DictionaryEntry de in Table) {
 158                                         string key = (string) de.Key;
 159                                         if (String.Compare (key, name, true, CultureInfo.InvariantCulture) == 0)
 160                                                 return de.Value;
 161                                 }
 162                                 return null;
 163                         } else
 164                                 return Table[name];
 165                 }
 166
 167                 public virtual string GetString (string name)
 168                 {
 169                         Object o = GetObject (name);
 170                         if (o == null)
 171                                 return null;
 172                         if (o is string)
 173                                 return (string) o;
 174                         throw new InvalidOperationException("Not a string");
 175                 }
 176
 177                 public virtual string GetString (string name, bool ignoreCase)
 178                 {
 179                         Object o = GetObject (name, ignoreCase);
 180                         if (o == null)
 181                                 return null;
 182                         if (o is string)
 183                                 return (string) o;
 184                         throw new InvalidOperationException("Not a string");
 185                 }
 186
 187                 protected virtual void ReadResources ()
 188                 {
 189                         if (Reader == null)
 190                                 throw new InvalidOperationException ("ResourceSet is closed.");
 191
 192                         IDictionaryEnumerator i = Reader.GetEnumerator();
 193
 194                         if (Table == null)
 195                                 Table = new Hashtable ();
 196                         i.Reset ();
 197
 198                         while (i.MoveNext ())
 199                                 Table.Add (i.Key, i.Value);
 200                 }
 201         }
 202 }