mcs/class/System.Configuration/System.Configuration/ConfigurationSection.cs

   1 //
   2 // System.Configuration.ConfigurationSection.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //  Lluis Sanchez Gual (lluis@novell.com)
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining
   9 // a copy of this software and associated documentation files (the
  10 // "Software"), to deal in the Software without restriction, including
  11 // without limitation the rights to use, copy, modify, merge, publish,
  12 // distribute, sublicense, and/or sell copies of the Software, and to
  13 // permit persons to whom the Software is furnished to do so, subject to
  14 // the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be
  17 // included in all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 //
  27 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  28 //
  29
  30 #if NET_2_0
  31 using System.Collections;
  32 using System.Xml;
  33 using System.IO;
  34 #if !TARGET_JVM
  35 using System.Security.Cryptography.Xml;
  36 #endif
  37
  38 namespace System.Configuration
  39 {
  40         public abstract class ConfigurationSection : ConfigurationElement
  41         {
  42                 SectionInformation sectionInformation;
  43                 IConfigurationSectionHandler section_handler;
  44                 string externalDataXml;
  45
  46                 protected ConfigurationSection ()
  47                 {
  48                 }
  49
  50                 internal string ExternalDataXml {
  51                         get { return externalDataXml; }
  52                 }
  53
  54                 internal IConfigurationSectionHandler SectionHandler {
  55                         get { return section_handler; }
  56                         set { section_handler = value; }
  57                 }
  58
  59                 [MonoTODO]
  60                 public SectionInformation SectionInformation {
  61                         get {
  62                                 if (sectionInformation == null)
  63                                         sectionInformation = new SectionInformation ();
  64                                 return sectionInformation;
  65                         }
  66                 }
  67
  68                 [MonoTODO ("Provide ConfigContext. Likely the culprit of bug #322493")]
  69                 protected internal virtual object GetRuntimeObject ()
  70                 {
  71                         if (SectionHandler != null) {
  72                                 ConfigurationSection parentSection = sectionInformation != null ? sectionInformation.GetParentSection () : null;
  73                                 object parent = parentSection != null ? parentSection.GetRuntimeObject () : null;
  74                                 if (RawXml == null)
  75                                         return parent;
  76                                 XmlDocument doc = new XmlDocument ();
  77                                 doc.LoadXml (RawXml);
  78                                 return SectionHandler.Create (parent, null, doc.DocumentElement);
  79                         }
  80                         return this;
  81                 }
  82
  83                 [MonoTODO]
  84                 protected internal override bool IsModified ()
  85                 {
  86                         return base.IsModified ();
  87                 }
  88
  89                 [MonoTODO]
  90                 protected internal override void ResetModified ()
  91                 {
  92                         base.ResetModified ();
  93                 }
  94
  95                 ConfigurationElement CreateElement (Type t)
  96                 {
  97                         ConfigurationElement elem = (ConfigurationElement) Activator.CreateInstance (t);
  98                         elem.Init ();
  99                         if (IsReadOnly ())
 100                                 elem.SetReadOnly ();
 101                         return elem;
 102                 }
 103
 104                 [MonoInternalNote ("find the proper location for the decryption stuff")]
 105                 protected internal virtual void DeserializeSection (XmlReader reader)
 106                 {
 107                         reader.MoveToContent ();
 108
 109                         string protection_provider = null;
 110                         string config_source = null;
 111                         string localName;
 112
 113                         while (reader.MoveToNextAttribute ()) {
 114                                 localName = reader.LocalName;
 115
 116                                 if (localName == "configProtectionProvider")
 117                                         protection_provider = reader.Value;
 118                                 else if (localName == "configSource")
 119                                         config_source = reader.Value;
 120                         }
 121
 122                         /* XXX this stuff shouldn't be here */
 123                         {
 124                                 if (protection_provider != null) {
 125                                         ProtectedConfigurationProvider prov = ProtectedConfiguration.GetProvider (protection_provider, true);
 126                                         XmlDocument doc = new XmlDocument ();
 127
 128                                         reader.MoveToElement ();
 129
 130                                         doc.Load (new StringReader (reader.ReadInnerXml ()));
 131
 132                                         XmlNode n = prov.Decrypt (doc);
 133
 134                                         reader = new XmlNodeReader (n);
 135
 136                                         SectionInformation.ProtectSection (protection_provider);
 137
 138                                         reader.MoveToContent ();
 139                                 }
 140                         }
 141
 142                         if (config_source != null)
 143                                 SectionInformation.ConfigSource = config_source;
 144
 145                         SectionInformation.SetRawXml (RawXml);
 146                         DeserializeElement (reader, false);
 147                 }
 148
 149                 internal void DeserializeConfigSource (string basePath)
 150                 {
 151                         string config_source = SectionInformation.ConfigSource;
 152
 153                         if (String.IsNullOrEmpty (config_source))
 154                                 return;
 155
 156                         if (Path.IsPathRooted (config_source))
 157                                 throw new ConfigurationException ("The configSource attribute must be a relative physical path.");
 158
 159                         if (HasLocalModifications ())
 160                                 throw new ConfigurationException ("A section using 'configSource' may contain no other attributes or elements.");
 161
 162                         string path = Path.Combine (basePath, config_source);
 163                         if (!File.Exists (path)) {
 164                                 RawXml = null;
 165                                 SectionInformation.SetRawXml (null);
 166                                 return;
 167                         }
 168
 169                         RawXml = File.ReadAllText (path);
 170                         SectionInformation.SetRawXml (RawXml);
 171                         DeserializeElement (new XmlTextReader (new StringReader (RawXml)), false);
 172                 }
 173
 174                 protected internal virtual string SerializeSection (ConfigurationElement parentElement, string name, ConfigurationSaveMode saveMode)
 175                 {
 176                         externalDataXml = null;
 177                         ConfigurationElement elem;
 178                         if (parentElement != null) {
 179                                 elem = (ConfigurationElement) CreateElement (GetType());
 180                                 elem.Unmerge (this, parentElement, saveMode);
 181                         }
 182                         else
 183                                 elem = this;
 184
 185                         string ret;
 186                         using (StringWriter sw = new StringWriter ()) {
 187                                 using (XmlTextWriter tw = new XmlTextWriter (sw)) {
 188                                         tw.Formatting = Formatting.Indented;
 189                                         elem.SerializeToXmlElement (tw, name);
 190                                         tw.Close ();
 191                                 }
 192
 193                                 ret = sw.ToString ();
 194                         }
 195
 196                         string config_source = SectionInformation.ConfigSource;
 197
 198                         if (String.IsNullOrEmpty (config_source))
 199                                 return ret;
 200
 201                         externalDataXml = ret;
 202                         using (StringWriter sw = new StringWriter ()) {
 203                                 bool haveName = !String.IsNullOrEmpty (name);
 204
 205                                 using (XmlTextWriter tw = new XmlTextWriter (sw)) {
 206                                         if (haveName)
 207                                                 tw.WriteStartElement (name);
 208                                         tw.WriteAttributeString ("configSource", config_source);
 209                                         if (haveName)
 210                                                 tw.WriteEndElement ();
 211                                 }
 212
 213                                 return sw.ToString ();
 214                         }
 215                 }
 216         }
 217 }
 218 #endif