mcs/class/System/System.Configuration/ConfigurationSettings.cs

   1 //
   2 // System.Configuration.ConfigurationSettings.cs
   3 //
   4 // Author:
   5 //   Christopher Podurgiel (cpodurgiel@msn.com)
   6 //   Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //   Eric Lindvall (eric@5stops.com)
   8 //
   9 // (c) Christopher Podurgiel
  10 // (c) 2002 Ximian, Inc. (http://www.ximian.com)
  11 // (c) 2003 Novell, Inc. (http://www.novell.com)
  12 //
  13
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 #if CONFIGURATION_DEP && !TARGET_JVM
  36 extern alias PrebuiltSystem;
  37 using NameValueCollection = PrebuiltSystem.System.Collections.Specialized.NameValueCollection;
  38 #endif
  39
  40 using System;
  41 using System.Collections;
  42 using System.Collections.Specialized;
  43 using System.IO;
  44 using System.Runtime.CompilerServices;
  45 using System.Security.Permissions;
  46 #if (XML_DEP)
  47 using System.Xml;
  48 using System.Xml.XPath;
  49 #endif
  50 #if TARGET_JVM
  51 using vmw.common;
  52 using vmw.@internal.io;
  53 #endif
  54
  55 namespace System.Configuration
  56 {
  57         public sealed class ConfigurationSettings
  58         {
  59 #if !TARGET_JVM
  60                 static IConfigurationSystem config = DefaultConfig.GetInstance ();
  61 #else
  62                 static IConfigurationSystem config {
  63                         get {
  64                                 IConfigurationSystem conf = (IConfigurationSystem) AppDomain.CurrentDomain.GetData ("ConfigurationSettings.Config");
  65                                 if (conf == null) {
  66                                         conf = DefaultConfig.GetInstance ();
  67                                         AppDomain.CurrentDomain.SetData ("ConfigurationSettings.Config", conf);
  68                                 }
  69                                 return conf;
  70                         }
  71                         set {
  72                                 AppDomain.CurrentDomain.SetData ("ConfigurationSettings.Config", value);
  73                         }
  74                 }
  75 #endif
  76                 static object lockobj = new object ();
  77                 private ConfigurationSettings ()
  78                 {
  79                 }
  80
  81 #if NET_2_0
  82                 [Obsolete ("This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.GetSection")]
  83 #endif
  84                 public static object GetConfig (string sectionName)
  85                 {
  86                         return config.GetConfig (sectionName);
  87                 }
  88
  89 #if NET_2_0
  90                 [Obsolete ("This property is obsolete.  Please use System.Configuration.ConfigurationManager.AppSettings")]
  91 #endif
  92                 public static NameValueCollection AppSettings
  93                 {
  94                         get {
  95 #if NET_2_0 && CONFIGURATION_DEP
  96                                 object appSettings = ConfigurationManager.GetSection ("appSettings");
  97 #else
  98                                 object appSettings = GetConfig ("appSettings");
  99 #endif
 100                                 if (appSettings == null)
 101                                         appSettings = new NameValueCollection ();
 102                                 return (NameValueCollection) appSettings;
 103                         }
 104                 }
 105
 106                 // Invoked from System.Web, disable warning
 107                 internal static IConfigurationSystem ChangeConfigurationSystem (IConfigurationSystem newSystem)
 108                 {
 109                         if (newSystem == null)
 110                                 throw new ArgumentNullException ("newSystem");
 111
 112                         lock (lockobj) {
 113                                 IConfigurationSystem old = config;
 114                                 config = newSystem;
 115                                 return old;
 116                         }
 117                 }
 118         }
 119
 120         //
 121         // class DefaultConfig: read configuration from machine.config file and application
 122         // config file if available.
 123         //
 124         class DefaultConfig : IConfigurationSystem
 125         {
 126 #if !TARGET_JVM
 127                 static readonly DefaultConfig instance = new DefaultConfig ();
 128 #else
 129                 static DefaultConfig instance {
 130                         get {
 131                                 DefaultConfig conf = (DefaultConfig) AppDomain.CurrentDomain.GetData ("DefaultConfig.instance");
 132                                 if (conf == null) {
 133                                         conf = new DefaultConfig ();
 134                                         AppDomain.CurrentDomain.SetData ("DefaultConfig.instance", conf);
 135                                 }
 136                                 return conf;
 137                         }
 138                         set {
 139                                 AppDomain.CurrentDomain.SetData ("DefaultConfig.instance", value);
 140                         }
 141                 }
 142 #endif
 143                 ConfigurationData config;
 144
 145                 private DefaultConfig ()
 146                 {
 147                 }
 148
 149                 public static DefaultConfig GetInstance ()
 150                 {
 151                         return instance;
 152                 }
 153
 154 #if NET_2_0
 155                 [Obsolete ("This method is obsolete.  Please use System.Configuration.ConfigurationManager.GetConfig")]
 156 #endif
 157                 public object GetConfig (string sectionName)
 158                 {
 159                         Init ();
 160                         return config.GetConfig (sectionName);
 161                 }
 162
 163                 public void Init ()
 164                 {
 165                         lock (this) {
 166                                 if (config != null)
 167                                         return;
 168
 169                                 ConfigurationData data = new ConfigurationData ();
 170                                 if (data.LoadString (GetBundledMachineConfig ())) {
 171                                         // do nothing
 172                                 } else {
 173                                         if (!data.Load (GetMachineConfigPath ()))
 174                                                 throw new ConfigurationException ("Cannot find " + GetMachineConfigPath ());
 175
 176                                 }
 177                                 string appfile = GetAppConfigPath ();
 178                                 if (appfile == null) {
 179                                         config = data;
 180                                         return;
 181                                 }
 182
 183                                 ConfigurationData appData = new ConfigurationData (data);
 184                                 if (appData.Load (appfile))
 185                                         config = appData;
 186                                 else
 187                                         config = data;
 188                         }
 189                 }
 190
 191                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 192                 extern private static string get_bundled_machine_config ();
 193                 internal static string GetBundledMachineConfig ()
 194                 {
 195                         return get_bundled_machine_config ();
 196                 }
 197 #if TARGET_JVM
 198                 internal static string GetMachineConfigPath ()
 199                 {
 200                         return "/machine.config";
 201                 }
 202 #else
 203                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 204                 extern private static string get_machine_config_path ();
 205                 internal static string GetMachineConfigPath ()
 206                 {
 207                         return get_machine_config_path ();
 208                 }
 209 #endif
 210                 private static string GetAppConfigPath ()
 211                 {
 212                         AppDomainSetup currentInfo = AppDomain.CurrentDomain.SetupInformation;
 213
 214                         string configFile = currentInfo.ConfigurationFile;
 215                         if (configFile == null || configFile.Length == 0)
 216                                 return null;
 217
 218                         return configFile;
 219
 220                 }
 221         }
 222
 223         enum AllowDefinition
 224         {
 225                 Everywhere,
 226                 MachineOnly,
 227                 MachineToApplication
 228         }
 229
 230         class SectionData
 231         {
 232                 public readonly string SectionName;
 233                 public readonly string TypeName;
 234                 public readonly bool AllowLocation;
 235                 public readonly AllowDefinition AllowDefinition;
 236                 public string FileName;
 237                 public readonly bool RequirePermission;
 238
 239                 public SectionData (string sectionName, string typeName,
 240                             bool allowLocation, AllowDefinition allowDefinition, bool requirePermission)
 241                 {
 242                         SectionName = sectionName;
 243                         TypeName = typeName;
 244                         AllowLocation = allowLocation;
 245                         AllowDefinition = allowDefinition;
 246                         RequirePermission = requirePermission;
 247                 }
 248         }
 249
 250
 251         class ConfigurationData
 252         {
 253                 ConfigurationData parent;
 254                 Hashtable factories;
 255                 static object removedMark = new object ();
 256                 static object emptyMark = new object ();
 257 #if (XML_DEP)
 258                 Hashtable pending;
 259                 string fileName;
 260                 static object groupMark = new object ();
 261 #endif
 262                 Hashtable cache;
 263
 264                 Hashtable FileCache {
 265                         get {
 266                                 if (cache != null)
 267                                         return cache;
 268
 269                                 cache = new Hashtable ();
 270                                 return cache;
 271                         }
 272                 }
 273
 274                 public ConfigurationData () : this (null)
 275                 {
 276                 }
 277
 278                 public ConfigurationData (ConfigurationData parent)
 279                 {
 280                         this.parent = (parent == this) ? null : parent;
 281                         factories = new Hashtable ();
 282                 }
 283
 284                 // SECURITY-FIXME: limit this with an imperative assert for reading the specific file
 285                 [FileIOPermission (SecurityAction.Assert, Unrestricted = true)]
 286                 public bool Load (string fileName)
 287                 {
 288 #if (XML_DEP)
 289                         this.fileName = fileName;
 290                         if (fileName == null
 291 #if !TARGET_JVM
 292                                 || !File.Exists (fileName)
 293 #endif
 294 )
 295                                 return false;
 296
 297                         XmlTextReader reader = null;
 298
 299                         try {
 300 #if !TARGET_JVM
 301                                 FileStream fs = new FileStream (fileName, FileMode.Open, FileAccess.Read);
 302 #else
 303                                 Stream fs = (Stream) vmw.common.IOUtils.getStream (fileName);
 304
 305                                 //patch for machine.config
 306                                 if (fs == null && fileName.EndsWith ("machine.config")) {
 307                                         fs = (Stream) IOUtils.getStreamForGHConfigs (fileName);
 308                                 }
 309
 310                                 if (fs == null) {
 311                                         return false;
 312                                 }
 313 #endif
 314                                 reader = new XmlTextReader (fs);
 315                                 if (InitRead (reader))
 316                                         ReadConfigFile (reader);
 317                         } catch (ConfigurationException) {
 318                                 throw;
 319                         } catch (Exception e) {
 320                                 throw new ConfigurationException ("Error reading " + fileName, e);
 321                         } finally {
 322                                 if (reader != null)
 323                                         reader.Close();
 324                         }
 325 #endif
 326                         return true;
 327                 }
 328
 329                 public bool LoadString (string data)
 330                 {
 331                         if (data == null)
 332                                 return false;
 333 #if (XML_DEP)
 334                         XmlTextReader reader = null;
 335
 336                         try {
 337                                 TextReader tr = new StringReader (data);
 338                                 reader = new XmlTextReader (tr);
 339                                 if (InitRead (reader))
 340                                         ReadConfigFile (reader);
 341                         } catch (ConfigurationException) {
 342                                 throw;
 343                         } catch (Exception e) {
 344                                 throw new ConfigurationException ("Error reading " + fileName, e);
 345                         } finally {
 346                                 if (reader != null)
 347                                         reader.Close();
 348                         }
 349 #endif
 350                         return true;
 351                 }
 352
 353                 object GetHandler (string sectionName)
 354                 {
 355                         lock (factories) {
 356                                 object o = factories [sectionName];
 357                                 if (o == null || o == removedMark) {
 358                                         if (parent != null)
 359                                                 return parent.GetHandler (sectionName);
 360
 361                                         return null;
 362                                 }
 363
 364                                 if (o is IConfigurationSectionHandler)
 365                                         return (IConfigurationSectionHandler) o;
 366
 367                                 o = CreateNewHandler (sectionName, (SectionData) o);
 368                                 factories [sectionName] = o;
 369                                 return o;
 370                         }
 371                 }
 372
 373                 object CreateNewHandler (string sectionName, SectionData section)
 374                 {
 375                         Type t = Type.GetType (section.TypeName);
 376                         if (t == null)
 377                                 throw new ConfigurationException ("Cannot get Type for " + section.TypeName);
 378
 379 #if false
 380                         Type iconfig = typeof (IConfigurationSectionHandler);
 381                         if (!iconfig.IsAssignableFrom (t))
 382                                 throw new ConfigurationException (sectionName + " does not implement " + iconfig);
 383 #endif
 384
 385                         object o = Activator.CreateInstance (t, true);
 386                         if (o == null)
 387                                 throw new ConfigurationException ("Cannot get instance for " + t);
 388
 389                         return o;
 390                 }
 391 #if (XML_DEP)
 392                 XmlDocument GetInnerDoc (XmlDocument doc, int i, string [] sectionPath)
 393                 {
 394                         if (++i >= sectionPath.Length)
 395                                 return doc;
 396
 397                         if (doc.DocumentElement == null)
 398                                 return null;
 399
 400                         XmlNode node = doc.DocumentElement.FirstChild;
 401                         while (node != null) {
 402                                 if (node.Name == sectionPath [i]) {
 403                                         ConfigXmlDocument result = new ConfigXmlDocument ();
 404                                         result.Load (new StringReader (node.OuterXml));
 405                                         return GetInnerDoc (result, i, sectionPath);
 406                                 }
 407                                 node = node.NextSibling;
 408                         }
 409
 410                         return null;
 411                 }
 412
 413                 XmlDocument GetDocumentForSection (string sectionName)
 414                 {
 415                         ConfigXmlDocument doc = new ConfigXmlDocument ();
 416                         if (pending == null)
 417                                 return doc;
 418
 419                         string [] sectionPath = sectionName.Split ('/');
 420                         string outerxml = pending [sectionPath [0]] as string;
 421                         if (outerxml == null)
 422                                 return doc;
 423
 424                         StringReader reader = new StringReader (outerxml);
 425                         XmlTextReader rd = new XmlTextReader (reader);
 426                         rd.MoveToContent ();
 427                         doc.LoadSingleElement (fileName, rd);
 428
 429                         return GetInnerDoc (doc, 0, sectionPath);
 430                 }
 431
 432                 object GetConfigInternal (string sectionName)
 433                 {
 434                         object handler = GetHandler (sectionName);
 435                         IConfigurationSectionHandler iconf = handler as IConfigurationSectionHandler;
 436                         if (iconf == null)
 437                                 return handler;
 438
 439                         object parentConfig = null;
 440                         if (parent != null)
 441                                 parentConfig = parent.GetConfig (sectionName);
 442
 443                         XmlDocument doc = GetDocumentForSection (sectionName);
 444                         if (doc == null || doc.DocumentElement == null)
 445                                 return parentConfig;
 446
 447                         return iconf.Create (parentConfig, fileName, doc.DocumentElement);
 448                 }
 449 #else
 450                 object GetConfigInternal (string sectionName)
 451                 {
 452                     return null;
 453                 }
 454 #endif
 455                 public object GetConfig (string sectionName)
 456                 {
 457                         object config;
 458                         lock (this) {
 459                                 config = this.FileCache [sectionName];
 460                         }
 461
 462                         if (config == emptyMark)
 463                                 return null;
 464
 465                         if (config != null)
 466                                 return config;
 467
 468                         lock (this) {
 469                                 config = GetConfigInternal (sectionName);
 470                                 this.FileCache [sectionName] = (config == null) ? emptyMark : config;
 471                         }
 472
 473                         return config;
 474                 }
 475
 476                 private object LookForFactory (string key)
 477                 {
 478                         object o = factories [key];
 479                         if (o != null)
 480                                 return o;
 481
 482                         if (parent != null)
 483                                 return parent.LookForFactory (key);
 484
 485                         return null;
 486                 }
 487 #if (XML_DEP)
 488                 private bool InitRead (XmlTextReader reader)
 489                 {
 490                         reader.MoveToContent ();
 491                         if (reader.NodeType != XmlNodeType.Element || reader.Name != "configuration")
 492                                 ThrowException ("Configuration file does not have a valid root element", reader);
 493
 494                         if (reader.HasAttributes)
 495                                 ThrowException ("Unrecognized attribute in root element", reader);
 496                         if (reader.IsEmptyElement) {
 497                                 reader.Skip ();
 498                                 return false;
 499                         }
 500                         reader.Read ();
 501                         reader.MoveToContent ();
 502                         return reader.NodeType != XmlNodeType.EndElement;
 503                 }
 504
 505                 // FIXME: this approach is not always safe and likely to cause bugs.
 506                 private void MoveToNextElement (XmlTextReader reader)
 507                 {
 508                         while (reader.Read ()) {
 509                                 XmlNodeType ntype = reader.NodeType;
 510                                 if (ntype == XmlNodeType.Element)
 511                                         return;
 512
 513                                 if (ntype != XmlNodeType.Whitespace &&
 514                                     ntype != XmlNodeType.Comment &&
 515                                     ntype != XmlNodeType.SignificantWhitespace &&
 516                                     ntype != XmlNodeType.EndElement)
 517                                         ThrowException ("Unrecognized element", reader);
 518                         }
 519                 }
 520
 521                 private void ReadSection (XmlTextReader reader, string sectionName)
 522                 {
 523                         string attName;
 524                         string nameValue = null;
 525                         string typeValue = null;
 526                         string allowLoc = null, allowDef = null;
 527                         bool requirePermission = false;
 528                         string requirePer = null;
 529                         bool allowLocation = true;
 530                         AllowDefinition allowDefinition = AllowDefinition.Everywhere;
 531
 532                         while (reader.MoveToNextAttribute ()) {
 533                                 attName = reader.Name;
 534                                 if (attName == null)
 535                                         continue;
 536
 537                                 if (attName == "allowLocation") {
 538                                         if (allowLoc != null)
 539                                                 ThrowException ("Duplicated allowLocation attribute.", reader);
 540
 541                                         allowLoc = reader.Value;
 542                                         allowLocation = (allowLoc == "true");
 543                                         if (!allowLocation && allowLoc != "false")
 544                                                 ThrowException ("Invalid attribute value", reader);
 545
 546                                         continue;
 547                                 }
 548
 549                                 if (attName == "requirePermission") {
 550                                         if (requirePer != null)
 551                                                 ThrowException ("Duplicated requirePermission attribute.", reader);
 552                                         requirePer = reader.Value;
 553                                         requirePermission = (requirePer == "true");
 554                                         if (!requirePermission && requirePer != "false")
 555                                                 ThrowException ("Invalid attribute value", reader);
 556                                         continue;
 557                                 }
 558
 559                                 if (attName == "allowDefinition") {
 560                                         if (allowDef != null)
 561                                                 ThrowException ("Duplicated allowDefinition attribute.", reader);
 562
 563                                         allowDef = reader.Value;
 564                                         try {
 565                                                 allowDefinition = (AllowDefinition) Enum.Parse (
 566                                                                    typeof (AllowDefinition), allowDef);
 567                                         } catch {
 568                                                 ThrowException ("Invalid attribute value", reader);
 569                                         }
 570
 571                                         continue;
 572                                 }
 573
 574                                 if (attName == "type")  {
 575                                         if (typeValue != null)
 576                                                 ThrowException ("Duplicated type attribute.", reader);
 577                                         typeValue = reader.Value;
 578                                         continue;
 579                                 }
 580
 581                                 if (attName == "name")  {
 582                                         if (nameValue != null)
 583                                                 ThrowException ("Duplicated name attribute.", reader);
 584                                         nameValue = reader.Value;
 585                                         if (nameValue == "location")
 586                                                 ThrowException ("location is a reserved section name", reader);
 587                                         continue;
 588                                 }
 589
 590                                 ThrowException ("Unrecognized attribute.", reader);
 591                         }
 592
 593                         if (nameValue == null || typeValue == null)
 594                                 ThrowException ("Required attribute missing", reader);
 595
 596                         if (sectionName != null)
 597                                 nameValue = sectionName + '/' + nameValue;
 598
 599                         reader.MoveToElement();
 600                         object o = LookForFactory (nameValue);
 601                         if (o != null && o != removedMark)
 602                                 ThrowException ("Already have a factory for " + nameValue, reader);
 603                         SectionData section = new SectionData (nameValue, typeValue, allowLocation,
 604                                 allowDefinition, requirePermission);
 605                         section.FileName = fileName;
 606                         factories [nameValue] = section;
 607
 608                         if (reader.IsEmptyElement)
 609                                 reader.Skip ();
 610                         else {
 611                                 reader.Read ();
 612                                 reader.MoveToContent ();
 613                                 if (reader.NodeType != XmlNodeType.EndElement)
 614                                         // sub-section inside a section
 615                                         ReadSections (reader, nameValue);
 616                                 reader.ReadEndElement ();
 617                         }
 618                         reader.MoveToContent ();
 619                 }
 620
 621                 private void ReadRemoveSection (XmlTextReader reader, string sectionName)
 622                 {
 623                         if (!reader.MoveToNextAttribute () || reader.Name != "name")
 624                                 ThrowException ("Unrecognized attribute.", reader);
 625
 626                         string removeValue = reader.Value;
 627                         if (removeValue == null || removeValue.Length == 0)
 628                                 ThrowException ("Empty name to remove", reader);
 629
 630                         reader.MoveToElement ();
 631
 632                         if (sectionName != null)
 633                                 removeValue = sectionName + '/' + removeValue;
 634
 635                         object o = LookForFactory (removeValue);
 636                         if (o != null && o == removedMark)
 637                                 ThrowException ("No factory for " + removeValue, reader);
 638
 639                         factories [removeValue] = removedMark;
 640                         MoveToNextElement (reader);
 641                 }
 642
 643                 private void ReadSectionGroup (XmlTextReader reader, string configSection)
 644                 {
 645                         if (!reader.MoveToNextAttribute ())
 646                                 ThrowException ("sectionGroup must have a 'name' attribute.", reader);
 647
 648                         string value = null;
 649                         do {
 650                                 if (reader.Name == "name") {
 651                                         if (value != null)
 652                                                 ThrowException ("Duplicate 'name' attribute.", reader);
 653                                         value = reader.Value;
 654                                 }
 655                                 else
 656 #if NET_2_0
 657                                 if (reader.Name != "type")
 658 #endif
 659                                         ThrowException ("Unrecognized attribute.", reader);
 660                         } while (reader.MoveToNextAttribute ());
 661
 662                         if (value == null)
 663                                 ThrowException ("No 'name' attribute.", reader);
 664
 665                         if (value == "location")
 666                                 ThrowException ("location is a reserved section name", reader);
 667
 668                         if (configSection != null)
 669                                 value = configSection + '/' + value;
 670
 671                         object o = LookForFactory (value);
 672                         if (o != null && o != removedMark && o != groupMark)
 673                                 ThrowException ("Already have a factory for " + value, reader);
 674
 675                         factories [value] = groupMark;
 676
 677                         if (reader.IsEmptyElement) {
 678                                 reader.Skip ();
 679                                 reader.MoveToContent ();
 680                         } else {
 681                                 reader.Read ();
 682                                 reader.MoveToContent ();
 683                                 if (reader.NodeType != XmlNodeType.EndElement)
 684                                         ReadSections (reader, value);
 685                                 reader.ReadEndElement ();
 686                                 reader.MoveToContent ();
 687                         }
 688                 }
 689
 690                 // It stops XmlReader consumption at where it found
 691                 // surrounding EndElement i.e. EndElement is not consumed here
 692                 private void ReadSections (XmlTextReader reader, string configSection)
 693                 {
 694                         int depth = reader.Depth;
 695                         for (reader.MoveToContent ();
 696                              reader.Depth == depth;
 697                              reader.MoveToContent ()) {
 698                                 string name = reader.Name;
 699                                 if (name == "section") {
 700                                         ReadSection (reader, configSection);
 701                                         continue;
 702                                 }
 703
 704                                 if (name == "remove") {
 705                                         ReadRemoveSection (reader, configSection);
 706                                         continue;
 707                                 }
 708
 709                                 if (name == "clear") {
 710                                         if (reader.HasAttributes)
 711                                                 ThrowException ("Unrecognized attribute.", reader);
 712
 713                                         factories.Clear ();
 714                                         MoveToNextElement (reader);
 715                                         continue;
 716                                 }
 717
 718                                 if (name == "sectionGroup") {
 719                                         ReadSectionGroup (reader, configSection);
 720                                         continue;
 721                                 }
 722
 723
 724                                 ThrowException ("Unrecognized element: " + reader.Name, reader);
 725                         }
 726                 }
 727
 728                 void StorePending (string name, XmlTextReader reader)
 729                 {
 730                         if (pending == null)
 731                                 pending = new Hashtable ();
 732
 733                         pending [name] = reader.ReadOuterXml ();
 734                 }
 735
 736                 private void ReadConfigFile (XmlTextReader reader)
 737                 {
 738                         int depth = reader.Depth;
 739                         for (reader.MoveToContent ();
 740                              !reader.EOF && reader.NodeType != XmlNodeType.EndElement;
 741                              reader.MoveToContent ()) {
 742                                 string name = reader.Name;
 743                                 if (name == "configSections") {
 744                                         if (reader.HasAttributes)
 745                                                 ThrowException ("Unrecognized attribute in <configSections>.", reader);
 746                                         if (reader.IsEmptyElement)
 747                                                 reader.Skip ();
 748                                         else {
 749                                                 reader.Read ();
 750                                                 reader.MoveToContent ();
 751                                                 if (reader.NodeType != XmlNodeType.EndElement)
 752                                                         ReadSections (reader, null);
 753                                                 reader.ReadEndElement ();
 754                                         }
 755                                 } else if (name != null && name != "") {
 756                                         StorePending (name, reader);
 757                                         MoveToNextElement (reader);
 758                                 } else {
 759                                         MoveToNextElement (reader);
 760                                 }
 761                         }
 762                 }
 763
 764                 private void ThrowException (string text, XmlTextReader reader)
 765                 {
 766                         throw new ConfigurationException (text, fileName, reader.LineNumber);
 767                 }
 768 #endif
 769         }
 770 }
 771
 772