class/System.Web/System.Web.UI/PageStatePersister.cs

   1 //
   2 // System.Web.UI.PageStatePersister
   3 //
   4 // Author:
   5 //      Dick Porter  <dick@ximian.com>
   6 //
   7 // Copyright (C) 2005-2010 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 namespace System.Web.UI
  30 {
  31         public abstract class PageStatePersister
  32         {
  33                 object control_state;
  34                 object view_state;
  35                 Page page;
  36                 IStateFormatter state_formatter;
  37
  38                 protected PageStatePersister (Page page)
  39                 {
  40                         if (page == null)
  41                                 throw new ArgumentNullException ("page");
  42                         this.page = page;
  43                 }
  44
  45                 public object ControlState  {
  46                         get { return control_state; }
  47                         set { control_state = value; }
  48                 }
  49
  50                 public object ViewState  {
  51                         get { return view_state; }
  52                         set { view_state = value; }
  53                 }
  54
  55                 protected Page Page {
  56                         get { return page; }
  57                         set { page = value; }
  58                 }
  59
  60                 protected IStateFormatter StateFormatter
  61                 {
  62                         get {
  63                                 if (state_formatter == null)
  64                                         state_formatter = page.GetFormatter ();
  65                                 return state_formatter;
  66                         }
  67                 }
  68
  69                 public abstract void Load ();
  70
  71                 public abstract void Save ();
  72         }
  73 }