mcs/class/System/System.Configuration/SettingsPropertyValue.cs

   1 //
   2 // System.Web.UI.WebControls.SettingsPropertyValue.cs
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //
   7 // (C) 2005 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 #if NET_2_0
  30 using System;
  31 using System.IO;
  32 using System.ComponentModel;
  33 using System.Runtime.Serialization.Formatters.Binary;
  34 #if (XML_DEP)
  35 using System.Xml;
  36 using System.Xml.Serialization;
  37 #endif
  38
  39 namespace System.Configuration
  40 {
  41
  42         public class SettingsPropertyValue
  43         {
  44                 public SettingsPropertyValue (SettingsProperty property)
  45                 {
  46                         this.property = property;
  47                         needPropertyValue = true;
  48                 }
  49
  50                 public bool Deserialized {
  51                         get {
  52                                 return deserialized;
  53                         }
  54                         set {
  55                                 deserialized = true;
  56                         }
  57                 }
  58
  59                 public bool IsDirty {
  60                         get {
  61                                 return dirty;
  62                         }
  63                         set {
  64                                 dirty = value;
  65                         }
  66                 }
  67
  68                 public string Name {
  69                         get {
  70                                 return property.Name;
  71                         }
  72                 }
  73
  74                 public SettingsProperty Property {
  75                         get {
  76                                 return property;
  77                         }
  78                 }
  79
  80                 public object PropertyValue {
  81                         get {
  82                                 if (needPropertyValue) {
  83                                         propertyValue = GetDeserializedValue ();
  84                                         if (propertyValue == null) {
  85                                                 propertyValue = property.DefaultValue;
  86                                                 defaulted = true;
  87                                         }
  88                                         needPropertyValue = false;
  89                                 }
  90
  91 #if notyet
  92                                 /* LAMESPEC: the msdn2 docs say that
  93                                  * for object types this
  94                                  * pessimistically sets Dirty == true.
  95                                  * tests, however, point out that that
  96                                  * is not the case. */
  97                                 if (!property.PropertyType.IsValueType)
  98                                         dirty = true;
  99 #endif
 100
 101                                 return propertyValue;
 102                         }
 103                         set {
 104                                 propertyValue = value;
 105                                 dirty = true;
 106                                 needPropertyValue = false;
 107                                 needSerializedValue = true;
 108                                 defaulted = false;
 109                         }
 110                 }
 111
 112                 [MonoTODO ("string type converter?")]
 113                 public object SerializedValue {
 114                         get {
 115                                 if (needSerializedValue) {
 116                                         needSerializedValue = false;
 117
 118                                         switch (property.SerializeAs)
 119                                         {
 120                                         case SettingsSerializeAs.String:
 121                                                 /* the docs say use a string type converter.. this means what? */
 122                                                 serializedValue = propertyValue.ToString();
 123                                                 break;
 124 #if (XML_DEP)
 125                                         case SettingsSerializeAs.Xml:
 126                                                 XmlSerializer serializer = new XmlSerializer (propertyValue.GetType());
 127                                                 StringWriter w = new StringWriter();
 128
 129                                                 serializer.Serialize (w, propertyValue);
 130                                                 serializedValue = w.ToString();
 131                                                 break;
 132 #endif
 133                                         case SettingsSerializeAs.Binary:
 134                                                 BinaryFormatter bf = new BinaryFormatter ();
 135                                                 MemoryStream ms = new MemoryStream ();
 136                                                 bf.Serialize (ms, propertyValue);
 137                                                 serializedValue = ms.ToArray();
 138                                                 break;
 139                                         default:
 140                                                 serializedValue = null;
 141                                                 break;
 142                                         }
 143
 144                                 }
 145
 146                                 return serializedValue;
 147                         }
 148                         set {
 149                                 serializedValue = value;
 150                                 needPropertyValue = true;
 151                         }
 152                 }
 153
 154                 public bool UsingDefaultValue {
 155                         get {
 156                                 return defaulted;
 157                         }
 158                 }
 159
 160                 private object GetDeserializedValue ()
 161                 {
 162                         if (serializedValue == null)
 163                                 return null;
 164
 165                         object deserializedObject = null;
 166
 167                         try {
 168                                 switch (property.SerializeAs) {
 169                                         case SettingsSerializeAs.String:
 170                                                 if (((string) serializedValue).Length > 0)
 171                                                         deserializedObject = TypeDescriptor.GetConverter (property.PropertyType).ConvertFromString ((string) serializedValue);
 172                                                 break;
 173 #if (XML_DEP)
 174                                         case SettingsSerializeAs.Xml:
 175                                                 XmlSerializer serializer = new XmlSerializer (property.PropertyType);
 176                                                 StringReader str = new StringReader ((string) serializedValue);
 177                                                 deserializedObject = serializer.Deserialize (XmlReader.Create (str));
 178                                                 break;
 179 #endif
 180                                         case SettingsSerializeAs.Binary:
 181                                                 BinaryFormatter bf = new BinaryFormatter ();
 182                                                 MemoryStream ms = new MemoryStream ((byte []) serializedValue);
 183                                                 deserializedObject = bf.Deserialize (ms);
 184                                                 break;
 185                                 }
 186                         }
 187                         catch (Exception e) {
 188                                 if (property.ThrowOnErrorDeserializing)
 189                                         throw e;
 190                         }
 191
 192                         return deserializedObject;
 193                 }
 194
 195                 SettingsProperty property;
 196                 object propertyValue;
 197                 object serializedValue;
 198                 bool needSerializedValue;
 199                 bool needPropertyValue;
 200                 bool dirty;
 201                 bool defaulted = false;
 202                 bool deserialized;
 203         }
 204
 205 }
 206
 207 #endif