Experiments/Attic/MVC/Castle.MVC/StatePersister/MemoryStatePersister.cs

   1 #region Apache Notice
   2 /*****************************************************************************
   3  *
   4  * Castle.MVC
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  ********************************************************************************/
  19 #endregion
  20
  21 #region Autors
  22
  23 /************************************************
  24 * Gilles Bayon
  25 *************************************************/
  26 #endregion
  27
  28 #region Using
  29
  30 using System;
  31 using System.Collections;
  32 using System.Collections.Specialized;
  33 using System.Security.Principal;
  34
  35 using Castle.MVC.States;
  36 #endregion
  37
  38 namespace Castle.MVC.StatePersister
  39 {
  40         /// <summary>
  41         /// This class provides simple memory-based state persister for Windows Forms applications.
  42         /// It is a singleton build by Castle IOC framework.
  43         /// </summary>
  44         public class MemoryStatePersister : IStatePersister
  45         {
  46
  47                 #region Fields
  48
  49                 private IState _state = null;
  50                 private IStateFactory _stateFactory = null;
  51
  52                 #endregion
  53
  54                 #region Constructors
  55
  56                 /// <summary>
  57                 /// Constructor
  58                 /// </summary>
  59                 public MemoryStatePersister()
  60                 {
  61                 }
  62                 #endregion
  63
  64                 #region IStatePersister Members
  65
  66                 /// <summary>
  67                 /// State factory
  68                 /// </summary>
  69                 public IStateFactory StateFactory
  70                 {
  71                         get{ return _stateFactory;}
  72                         set{ _stateFactory = value; }
  73                 }
  74
  75                 /// <summary>
  76                 /// Saves the State object in memory.
  77                 /// </summary>
  78                 /// <param name="state">A valid State object.</param>
  79                 public void Save(IState state)
  80                 {
  81                         _state = state;
  82                 }
  83
  84                 /// <summary>
  85                 /// Loads the saved state.
  86                 /// </summary>
  87                 /// <returns>The saved state</returns>
  88                 public IState Load()
  89                 {
  90                         if (_state==null)
  91                         {
  92                                 _state = _stateFactory.Create();
  93                         }
  94                         return _state;
  95                 }
  96
  97                 /// <summary>
  98                 /// Release a state
  99                 /// </summary>
 100                 /// <param name="state">The state to release.</param>
 101                 public void Release(IState state)
 102                 {
 103                         _stateFactory.Release(state);
 104                         _state = null;
 105                 }
 106                 #endregion
 107         }
 108 }