class/corlib/System.Resources/RuntimeResourceSet.cs

   1 //
   2 // System.Resources.InternalResourceSet
   3 //
   4 // Authors:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.IO;
  30
  31 namespace System.Resources {
  32
  33         // ResourceSet.GetObject always returns the same object reference - but ResourceManager doesn't use it!
  34         // Instead another internal type, RuntimeResourceSet, is used to return a cloned object (fix for bug #366489)
  35         [Serializable]
  36         internal class RuntimeResourceSet : ResourceSet {
  37
  38                 // Constructor for Activator.CreateInstance from Silverlight
  39                 public RuntimeResourceSet (UnmanagedMemoryStream stream) : base (stream)
  40                 {
  41                 }
  42
  43                 public RuntimeResourceSet (Stream stream) :
  44                         base (stream)
  45                 {
  46                 }
  47
  48                 public RuntimeResourceSet (string fileName) :
  49                         base (fileName)
  50                 {
  51                 }
  52
  53                 public override object GetObject (string name)
  54                 {
  55                         if (Reader == null)
  56                                 throw new ObjectDisposedException ("ResourceSet is closed.");
  57
  58                         return CloneDisposableObjectIfPossible (base.GetObject (name));
  59                 }
  60
  61                 public override object GetObject (string name, bool ignoreCase)
  62                 {
  63                         if (Reader == null)
  64                                 throw new ObjectDisposedException ("ResourceSet is closed.");
  65
  66                         return CloneDisposableObjectIfPossible (base.GetObject (name, ignoreCase));
  67                 }
  68
  69                 // if possible return a clone of the object if it's (a) clonable and (b) disposable
  70                 private object CloneDisposableObjectIfPossible (object value)
  71                 {
  72                         ICloneable clonable = (value as ICloneable);
  73                         return (clonable != null && (value is IDisposable)) ? clonable.Clone () : value;
  74                 }
  75         }
  76 }