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                 internal bool isDisposed = false;
  52
  53                 // Constructors
  54                 protected ResourceSet () {}
  55
  56                 public ResourceSet (IResourceReader reader)
  57                 {
  58                         if (reader == null)
  59                                 throw new ArgumentNullException ("The reader is null.");
  60                         Reader = reader;
  61                 }
  62
  63                 [SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
  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                         isDisposed = true;
 108                 }
 109
 110                 public virtual Type GetDefaultReader ()
 111                 {
 112                         return (typeof (ResourceReader));
 113                 }
 114                 public virtual Type GetDefaultWriter ()
 115                 {
 116                         return (typeof (ResourceWriter));
 117                 }
 118
 119 #if (NET_1_1)
 120
 121                 [ComVisible (false)]
 122                 public virtual IDictionaryEnumerator GetEnumerator ()
 123                 {
 124                         if (Table == null)
 125                                 ReadResources ();
 126                         return Table.GetEnumerator();
 127                 }
 128
 129                 IEnumerator IEnumerable.GetEnumerator ()
 130                 {
 131                         return this.GetEnumerator ();
 132                 }
 133
 134 #endif
 135
 136                 public virtual object GetObject (string name)
 137                 {
 138                         if (name == null)
 139                                 throw new ArgumentNullException ("The name parameter is null.");
 140                         if (Reader == null)
 141                                 throw new InvalidOperationException ("The ResourceSet has been closed.");
 142
 143                         if (Table == null) {
 144                                 ReadResources ();
 145                         }
 146
 147                         return(Table[name]);
 148                 }
 149
 150                 public virtual object GetObject (string name, bool ignoreCase)
 151                 {
 152                         if (name == null)
 153                                 throw new ArgumentNullException ("The name parameter is null.");
 154                         if (Reader == null)
 155                                 throw new InvalidOperationException ("ResourceSet has been closed.");
 156                         if (Table == null)
 157                                 ReadResources ();
 158
 159                         if (ignoreCase) {
 160                                 foreach (DictionaryEntry de in Table) {
 161                                         string key = (string) de.Key;
 162                                         if (String.Compare (key, name, true, CultureInfo.InvariantCulture) == 0)
 163                                                 return de.Value;
 164                                 }
 165                                 return null;
 166                         } else
 167                                 return Table[name];
 168                 }
 169
 170                 public virtual string GetString (string name)
 171                 {
 172                         Object o = GetObject (name);
 173                         if (o == null)
 174                                 return null;
 175                         if (o is string)
 176                                 return (string) o;
 177                         throw new InvalidOperationException("Not a string");
 178                 }
 179
 180                 public virtual string GetString (string name, bool ignoreCase)
 181                 {
 182                         Object o = GetObject (name, ignoreCase);
 183                         if (o == null)
 184                                 return null;
 185                         if (o is string)
 186                                 return (string) o;
 187                         throw new InvalidOperationException("Not a string");
 188                 }
 189
 190                 protected virtual void ReadResources ()
 191                 {
 192                         if (Reader == null)
 193                                 throw new InvalidOperationException ("ResourceSet is closed.");
 194
 195                         IDictionaryEnumerator i = Reader.GetEnumerator();
 196
 197                         if (Table == null)
 198                                 Table = new Hashtable ();
 199                         i.Reset ();
 200
 201                         while (i.MoveNext ())
 202                                 Table.Add (i.Key, i.Value);
 203                 }
 204         }
 205 }