mcs/class/System.Configuration/System.Configuration/ConfigurationElement.cs

   1 //
   2 // System.Configuration.ConfigurationElement.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.Reflection;
  34 using System.IO;
  35 using System.ComponentModel;
  36
  37 namespace System.Configuration
  38 {
  39         public abstract class ConfigurationElement
  40         {
  41                 string rawXml;
  42                 bool modified;
  43                 ElementMap map;
  44                 ConfigurationPropertyCollection keyProps;
  45                 ConfigurationElementCollection defaultCollection;
  46                 bool readOnly;
  47                 ElementInformation elementInfo;
  48                 ConfigurationElementProperty elementProperty;
  49                 Configuration _configuration;
  50                 bool elementPresent;
  51
  52                 internal Configuration Configuration {
  53                         get { return _configuration; }
  54                         set { _configuration = value; }
  55                 }
  56
  57                 protected ConfigurationElement ()
  58                 {
  59                 }
  60
  61                 internal virtual void InitFromProperty (PropertyInformation propertyInfo)
  62                 {
  63                         elementInfo = new ElementInformation (this, propertyInfo);
  64                         Init ();
  65                 }
  66
  67                 public ElementInformation ElementInformation {
  68                         get {
  69                                 if (elementInfo == null)
  70                                         elementInfo = new ElementInformation (this, null);
  71                                 return elementInfo;
  72                         }
  73                 }
  74
  75                 internal string RawXml {
  76                         get { return rawXml; }
  77                         set {
  78                                 // FIXME: this hack is nasty. We should make
  79                                 // some refactory on the entire assembly.
  80                                 if (rawXml == null || value != null)
  81                                         rawXml = value;
  82                         }
  83                 }
  84
  85                 protected internal virtual void Init ()
  86                 {
  87                 }
  88
  89                 protected internal virtual ConfigurationElementProperty ElementProperty {
  90                         get {
  91                                 if (elementProperty == null)
  92                                         elementProperty = new ConfigurationElementProperty (ElementInformation.Validator);
  93                                 return elementProperty;
  94                         }
  95                 }
  96
  97                 [MonoTODO]
  98                 protected ContextInformation EvaluationContext {
  99                         get {
 100                                 if (Configuration != null)
 101                                         return Configuration.EvaluationContext;
 102                                 throw new NotImplementedException ();
 103                         }
 104                 }
 105
 106                 ConfigurationLockCollection lockAllAttributesExcept;
 107                 public ConfigurationLockCollection LockAllAttributesExcept {
 108                         get {
 109                                 if (lockAllAttributesExcept == null) {
 110                                         lockAllAttributesExcept = new ConfigurationLockCollection (this, ConfigurationLockType.Attribute | ConfigurationLockType.Exclude);
 111                                 }
 112
 113                                 return lockAllAttributesExcept;
 114                         }
 115                 }
 116
 117                 ConfigurationLockCollection lockAllElementsExcept;
 118                 public ConfigurationLockCollection LockAllElementsExcept {
 119                         get {
 120                                 if (lockAllElementsExcept == null) {
 121                                         lockAllElementsExcept = new ConfigurationLockCollection (this, ConfigurationLockType.Element | ConfigurationLockType.Exclude);
 122                                 }
 123
 124                                 return lockAllElementsExcept;
 125                         }
 126                 }
 127
 128                 ConfigurationLockCollection lockAttributes;
 129                 public ConfigurationLockCollection LockAttributes {
 130                         get {
 131                                 if (lockAttributes == null) {
 132                                         lockAttributes = new ConfigurationLockCollection (this, ConfigurationLockType.Attribute);
 133                                 }
 134
 135                                 return lockAttributes;
 136                         }
 137                 }
 138
 139                 ConfigurationLockCollection lockElements;
 140                 public ConfigurationLockCollection LockElements {
 141                         get {
 142                                 if (lockElements == null) {
 143                                         lockElements = new ConfigurationLockCollection (this, ConfigurationLockType.Element);
 144                                 }
 145
 146                                 return lockElements;
 147                         }
 148                 }
 149
 150                 bool lockItem;
 151                 public bool LockItem {
 152                         get { return lockItem; }
 153                         set { lockItem = value; }
 154                 }
 155
 156                 [MonoTODO]
 157                 protected virtual void ListErrors (IList list)
 158                 {
 159                         throw new NotImplementedException ();
 160                 }
 161
 162                 [MonoTODO]
 163                 protected void SetPropertyValue (ConfigurationProperty prop, object value, bool ignoreLocks)
 164                 {
 165                         try {
 166                                 /* XXX all i know for certain is that Validation happens here */
 167                                 prop.Validate (value);
 168
 169                                 /* XXX presumably the actual setting of the
 170                                  * property happens here instead of in the
 171                                  * set_Item code below, but that would mean
 172                                  * the Value needs to be stuffed in the
 173                                  * property, not the propertyinfo (or else the
 174                                  * property needs a ref to the property info
 175                                  * to correctly set the value). */
 176                         }
 177                         catch (Exception e) {
 178                                 throw new ConfigurationErrorsException (String.Format ("The value for the property '{0}' is not valid. The error is: {1}", prop.Name, e.Message), e);
 179                         }
 180                 }
 181
 182                 internal ConfigurationPropertyCollection GetKeyProperties ()
 183                 {
 184                         if (keyProps != null) return keyProps;
 185
 186                         ConfigurationPropertyCollection tmpkeyProps = new ConfigurationPropertyCollection ();
 187                                 foreach (ConfigurationProperty prop in Properties) {
 188                                         if (prop.IsKey)
 189                                         tmpkeyProps.Add (prop);
 190                                 }
 191
 192                         return keyProps = tmpkeyProps;
 193                 }
 194
 195                 internal ConfigurationElementCollection GetDefaultCollection ()
 196                 {
 197                         if (defaultCollection != null) return defaultCollection;
 198
 199                         ConfigurationProperty defaultCollectionProp = null;
 200
 201                         foreach (ConfigurationProperty prop in Properties) {
 202                                 if (prop.IsDefaultCollection) {
 203                                         defaultCollectionProp = prop;
 204                                         break;
 205                                 }
 206                         }
 207
 208                         if (defaultCollectionProp != null) {
 209                                 defaultCollection = this [defaultCollectionProp] as ConfigurationElementCollection;
 210                         }
 211
 212                         return defaultCollection;
 213                 }
 214
 215                 protected internal object this [ConfigurationProperty property] {
 216                         get { return this [property.Name]; }
 217                         set { this [property.Name] = value; }
 218                 }
 219
 220                 protected internal object this [string property_name] {
 221                         get {
 222                                 PropertyInformation pi = ElementInformation.Properties [property_name];
 223                                 if (pi == null)
 224                                         throw new InvalidOperationException ("Property '" + property_name + "' not found in configuration element");
 225
 226                                 return pi.Value;
 227                         }
 228
 229                         set {
 230                                 PropertyInformation pi = ElementInformation.Properties [property_name];
 231                                 if (pi == null)
 232                                         throw new InvalidOperationException ("Property '" + property_name + "' not found in configuration element");
 233
 234                                 SetPropertyValue (pi.Property, value, false);
 235
 236                                 pi.Value = value;
 237                                 modified = true;
 238                         }
 239                 }
 240
 241                 protected internal virtual ConfigurationPropertyCollection Properties {
 242                         get {
 243                                 if (map == null)
 244                                         map = ElementMap.GetMap (GetType());
 245                                 return map.Properties;
 246                         }
 247                 }
 248
 249                 public override bool Equals (object compareTo)
 250                 {
 251                         ConfigurationElement other = compareTo as ConfigurationElement;
 252                         if (other == null) return false;
 253                         if (GetType() != other.GetType()) return false;
 254
 255                         foreach (ConfigurationProperty prop in Properties) {
 256                                 if (!object.Equals (this [prop], other [prop]))
 257                                         return false;
 258                         }
 259                         return true;
 260                 }
 261
 262                 public override int GetHashCode ()
 263                 {
 264                         int code = 0;
 265                         object o;
 266
 267                         foreach (ConfigurationProperty prop in Properties) {
 268                                 o = this [prop];
 269                                 if (o == null)
 270                                         continue;
 271
 272                                 code += o.GetHashCode ();
 273                         }
 274
 275                         return code;
 276                 }
 277
 278                 internal virtual bool HasValues ()
 279                 {
 280                         foreach (PropertyInformation pi in ElementInformation.Properties)
 281                                 if (pi.ValueOrigin != PropertyValueOrigin.Default)
 282                                         return true;
 283
 284                         return false;
 285                 }
 286
 287                 internal virtual bool HasLocalModifications ()
 288                 {
 289                         foreach (PropertyInformation pi in ElementInformation.Properties)
 290                                 if (pi.ValueOrigin == PropertyValueOrigin.SetHere && pi.IsModified)
 291                                         return true;
 292
 293                         return false;
 294                 }
 295
 296                 protected internal virtual void DeserializeElement (XmlReader reader, bool serializeCollectionKey)
 297                 {
 298                         Hashtable readProps = new Hashtable ();
 299
 300                         reader.MoveToContent ();
 301                         elementPresent = true;
 302
 303                         while (reader.MoveToNextAttribute ())
 304                         {
 305                                 PropertyInformation prop = ElementInformation.Properties [reader.LocalName];
 306                                 if (prop == null || (serializeCollectionKey && !prop.IsKey)) {
 307                                         /* handle the built in ConfigurationElement attributes here */
 308                                         if (reader.LocalName == "lockAllAttributesExcept") {
 309                                                 LockAllAttributesExcept.SetFromList (reader.Value);
 310                                         }
 311                                         else if (reader.LocalName == "lockAllElementsExcept") {
 312                                                 LockAllElementsExcept.SetFromList (reader.Value);
 313                                         }
 314                                         else if (reader.LocalName == "lockAttributes") {
 315                                                 LockAttributes.SetFromList (reader.Value);
 316                                         }
 317                                         else if (reader.LocalName == "lockElements") {
 318                                                 LockElements.SetFromList (reader.Value);
 319                                         }
 320                                         else if (reader.LocalName == "lockItem") {
 321                                                 LockItem = (reader.Value.ToLowerInvariant () == "true");
 322                                         }
 323                                         else if (reader.LocalName == "xmlns") {
 324                                                 /* ignore */
 325                                         } else if (this is ConfigurationSection && reader.LocalName == "configSource") {
 326                                                 /* ignore */
 327                                         } else if (!OnDeserializeUnrecognizedAttribute (reader.LocalName, reader.Value))
 328                                                 throw new ConfigurationErrorsException ("Unrecognized attribute '" + reader.LocalName + "'.", reader);
 329
 330                                         continue;
 331                                 }
 332
 333                                 if (readProps.ContainsKey (prop))
 334                                         throw new ConfigurationErrorsException ("The attribute '" + prop.Name + "' may only appear once in this element.", reader);
 335
 336                                 string value = null;
 337                                 try {
 338                                         value = reader.Value;
 339                                         ValidateValue (prop.Property, value);
 340                                         prop.SetStringValue (value);
 341                                 } catch (ConfigurationErrorsException) {
 342                                         throw;
 343                                 } catch (ConfigurationException) {
 344                                         throw;
 345                                 } catch (Exception ex) {
 346                                         string msg = String.Format ("The value for the property '{0}' is not valid. The error is: {1}", prop.Name, ex.Message);
 347                                         throw new ConfigurationErrorsException (msg, reader);
 348                                 }
 349                                 readProps [prop] = prop.Name;
 350
 351                                 ConfigXmlTextReader _reader = reader as ConfigXmlTextReader;
 352                                 if (_reader != null){
 353                                         prop.Source = _reader.Filename;
 354                                         prop.LineNumber = _reader.LineNumber;
 355                                 }
 356                         }
 357
 358                         reader.MoveToElement ();
 359                         if (reader.IsEmptyElement) {
 360                                 reader.Skip ();
 361                         } else {
 362                                 int depth = reader.Depth;
 363
 364                                 reader.ReadStartElement ();
 365                                 reader.MoveToContent ();
 366
 367                                 do {
 368                                         if (reader.NodeType != XmlNodeType.Element) {
 369                                                 reader.Skip ();
 370                                                 continue;
 371                                         }
 372
 373                                         PropertyInformation prop = ElementInformation.Properties [reader.LocalName];
 374                                         if (prop == null || (serializeCollectionKey && !prop.IsKey)) {
 375                                                 if (!OnDeserializeUnrecognizedElement (reader.LocalName, reader)) {
 376                                                         if (prop == null) {
 377                                                                 ConfigurationElementCollection c = GetDefaultCollection ();
 378                                                                 if (c != null && c.OnDeserializeUnrecognizedElement (reader.LocalName, reader))
 379                                                                         continue;
 380                                                         }
 381                                                         throw new ConfigurationErrorsException ("Unrecognized element '" + reader.LocalName + "'.", reader);
 382                                                 }
 383                                                 continue;
 384                                         }
 385
 386                                         if (!prop.IsElement)
 387                                                 throw new ConfigurationErrorsException ("Property '" + prop.Name + "' is not a ConfigurationElement.");
 388
 389                                         if (readProps.Contains (prop))
 390                                                 throw new ConfigurationErrorsException ("The element <" + prop.Name + "> may only appear once in this section.", reader);
 391
 392                                         ConfigurationElement val = (ConfigurationElement) prop.Value;
 393                                         val.DeserializeElement (reader, serializeCollectionKey);
 394                                         readProps [prop] = prop.Name;
 395
 396                                         if(depth == reader.Depth)
 397                                                 reader.Read();
 398
 399                                 } while (depth < reader.Depth);
 400                         }
 401
 402                         modified = false;
 403
 404                         foreach (PropertyInformation prop in ElementInformation.Properties)
 405                                 if (!String.IsNullOrEmpty(prop.Name) && prop.IsRequired && !readProps.ContainsKey (prop)) {
 406                                         PropertyInformation p = ElementInformation.Properties [prop.Name];
 407                                         if (p == null) {
 408                                                 object val = OnRequiredPropertyNotFound (prop.Name);
 409                                                 if (!object.Equals (val, prop.DefaultValue)) {
 410                                                         prop.Value = val;
 411                                                         prop.IsModified = false;
 412                                                 }
 413                                         }
 414                                 }
 415
 416                         PostDeserialize ();
 417                 }
 418
 419                 protected virtual bool OnDeserializeUnrecognizedAttribute (string name, string value)
 420                 {
 421                         return false;
 422                 }
 423
 424                 protected virtual bool OnDeserializeUnrecognizedElement (string element, XmlReader reader)
 425                 {
 426                         return false;
 427                 }
 428
 429                 protected virtual object OnRequiredPropertyNotFound (string name)
 430                 {
 431                         throw new ConfigurationErrorsException ("Required attribute '" + name + "' not found.");
 432                 }
 433
 434                 protected virtual void PreSerialize (XmlWriter writer)
 435                 {
 436                 }
 437
 438                 protected virtual void PostDeserialize ()
 439                 {
 440                 }
 441
 442                 protected internal virtual void InitializeDefault ()
 443                 {
 444                 }
 445
 446                 protected internal virtual bool IsModified ()
 447                 {
 448                         return modified;
 449                 }
 450
 451                 protected internal virtual void SetReadOnly ()
 452                 {
 453                         readOnly = true;
 454                 }
 455
 456                 public virtual bool IsReadOnly ()
 457                 {
 458                         return readOnly;
 459                 }
 460
 461                 protected internal virtual void Reset (ConfigurationElement parentElement)
 462                 {
 463                         elementPresent = false;
 464
 465                         if (parentElement != null)
 466                                 ElementInformation.Reset (parentElement.ElementInformation);
 467                         else
 468                                 InitializeDefault ();
 469                 }
 470
 471                 protected internal virtual void ResetModified ()
 472                 {
 473                         modified = false;
 474                         foreach (PropertyInformation p in ElementInformation.Properties)
 475                                 p.IsModified = false;
 476                 }
 477
 478                 protected internal virtual bool SerializeElement (XmlWriter writer, bool serializeCollectionKey)
 479                 {
 480                         PreSerialize (writer);
 481
 482                         if (serializeCollectionKey) {
 483                                 ConfigurationPropertyCollection props = GetKeyProperties ();
 484                                 foreach (ConfigurationProperty prop in props)
 485                                         writer.WriteAttributeString (prop.Name, prop.ConvertToString (this[prop.Name]));
 486                                 return props.Count > 0;
 487                         }
 488
 489                         bool wroteData = false;
 490
 491                         foreach (PropertyInformation prop in ElementInformation.Properties)
 492                         {
 493                                 if (prop.IsElement || prop.ValueOrigin == PropertyValueOrigin.Default)
 494                                         continue;
 495
 496                                 if (!object.Equals (prop.Value, prop.DefaultValue)) {
 497                                         writer.WriteAttributeString (prop.Name, prop.GetStringValue ());
 498                                         wroteData = true;
 499                                 }
 500                         }
 501
 502                         foreach (PropertyInformation prop in ElementInformation.Properties)
 503                         {
 504                                 if (!prop.IsElement)
 505                                         continue;
 506
 507                                 ConfigurationElement val = (ConfigurationElement) prop.Value;
 508                                 if (val != null)
 509                                         wroteData = val.SerializeToXmlElement (writer, prop.Name) || wroteData;
 510                         }
 511                         return wroteData;
 512                 }
 513
 514                 protected internal virtual bool SerializeToXmlElement (
 515                                 XmlWriter writer, string elementName)
 516                 {
 517                         if (!HasValues ())
 518                                 return false;
 519
 520                         if (elementName != null && elementName != "")
 521                                 writer.WriteStartElement (elementName);
 522                         bool res = SerializeElement (writer, false);
 523                         if (elementName != null && elementName != "")
 524                                 writer.WriteEndElement ();
 525                         return res;
 526                 }
 527
 528                 protected internal virtual void Unmerge (
 529                                 ConfigurationElement source, ConfigurationElement parent,
 530                                 ConfigurationSaveMode updateMode)
 531                 {
 532                         if (parent != null && source.GetType() != parent.GetType())
 533                                 throw new ConfigurationErrorsException ("Can't unmerge two elements of different type");
 534
 535                         foreach (PropertyInformation prop in source.ElementInformation.Properties)
 536                         {
 537                                 if (prop.ValueOrigin == PropertyValueOrigin.Default)
 538                                         continue;
 539
 540                                 PropertyInformation unmergedProp = ElementInformation.Properties [prop.Name];
 541
 542                                 object sourceValue = prop.Value;
 543                                 if      (parent == null || !parent.HasValue (prop.Name)) {
 544                                         unmergedProp.Value = sourceValue;
 545                                         continue;
 546                                 }
 547                                 else if (sourceValue != null) {
 548                                         object parentValue = parent [prop.Name];
 549                                         if (prop.IsElement) {
 550                                                 if (parentValue != null) {
 551                                                         ConfigurationElement copy = (ConfigurationElement) unmergedProp.Value;
 552                                                         copy.Unmerge ((ConfigurationElement) sourceValue, (ConfigurationElement) parentValue, updateMode);
 553                                                 }
 554                                                 else
 555                                                         unmergedProp.Value = sourceValue;
 556                                         }
 557                                         else {
 558                                                 if (!object.Equals (sourceValue, parentValue) ||
 559                                                         (updateMode == ConfigurationSaveMode.Full) ||
 560                                                         (updateMode == ConfigurationSaveMode.Modified && prop.ValueOrigin == PropertyValueOrigin.SetHere))
 561                                                         unmergedProp.Value = sourceValue;
 562                                         }
 563                                 }
 564                         }
 565                 }
 566
 567                 internal bool HasValue (string propName)
 568                 {
 569                         PropertyInformation info = ElementInformation.Properties [propName];
 570                         return info != null && info.ValueOrigin != PropertyValueOrigin.Default;
 571                 }
 572
 573                 internal bool IsReadFromConfig (string propName)
 574                 {
 575                         PropertyInformation info = ElementInformation.Properties [propName];
 576                         return info != null && info.ValueOrigin == PropertyValueOrigin.SetHere;
 577                 }
 578
 579                 internal bool IsElementPresent
 580                 {
 581                         get {   return elementPresent;  }
 582                 }
 583
 584                 void ValidateValue (ConfigurationProperty p, string value)
 585                 {
 586                         ConfigurationValidatorBase validator;
 587                         if (p == null || (validator = p.Validator) == null)
 588                                 return;
 589
 590                         if (!validator.CanValidate (p.Type))
 591                                 throw new ConfigurationErrorsException (
 592                                         String.Format ("Validator does not support type {0}", p.Type));
 593                         validator.Validate (p.ConvertFromString (value));
 594                 }
 595         }
 596
 597         internal class ElementMap
 598         {
 599 #if TARGET_JVM
 600                 const string elementMapsKey = "ElementMap_elementMaps";
 601                 static Hashtable elementMaps
 602                 {
 603                         get
 604                         {
 605                                 Hashtable tbl = (Hashtable) AppDomain.CurrentDomain.GetData (elementMapsKey);
 606                                 if (tbl == null) {
 607                                         lock (typeof (ElementMap)) {
 608                                                 tbl = (Hashtable) AppDomain.CurrentDomain.GetData (elementMapsKey);
 609                                                 if (tbl == null) {
 610                                                         tbl = Hashtable.Synchronized (new Hashtable ());
 611                                                         AppDomain.CurrentDomain.SetData (elementMapsKey, tbl);
 612                                                 }
 613                                         }
 614                                 }
 615                                 return tbl;
 616                         }
 617                 }
 618 #else
 619                 static readonly Hashtable elementMaps = Hashtable.Synchronized (new Hashtable ());
 620 #endif
 621
 622                 readonly ConfigurationPropertyCollection properties;
 623                 readonly ConfigurationCollectionAttribute collectionAttribute;
 624
 625                 public static ElementMap GetMap (Type t)
 626                 {
 627                         ElementMap map = elementMaps [t] as ElementMap;
 628                         if (map != null) return map;
 629                         map = new ElementMap (t);
 630                         elementMaps [t] = map;
 631                         return map;
 632                 }
 633
 634                 public ElementMap (Type t)
 635                 {
 636                         properties = new ConfigurationPropertyCollection ();
 637
 638                         collectionAttribute = Attribute.GetCustomAttribute (t, typeof(ConfigurationCollectionAttribute)) as ConfigurationCollectionAttribute;
 639
 640                         PropertyInfo[] props = t.GetProperties (BindingFlags.Public|BindingFlags.NonPublic|BindingFlags.Static|BindingFlags.Instance);
 641                         foreach (PropertyInfo prop in props)
 642                         {
 643                                 ConfigurationPropertyAttribute at = Attribute.GetCustomAttribute (prop, typeof(ConfigurationPropertyAttribute)) as ConfigurationPropertyAttribute;
 644                                 if (at == null) continue;
 645                                 string name = at.Name != null ? at.Name : prop.Name;
 646
 647                                 ConfigurationValidatorAttribute validatorAttr = Attribute.GetCustomAttribute (prop, typeof (ConfigurationValidatorAttribute)) as ConfigurationValidatorAttribute;
 648                                 ConfigurationValidatorBase validator = validatorAttr != null ? validatorAttr.ValidatorInstance : null;
 649
 650                                 TypeConverterAttribute convertAttr = (TypeConverterAttribute) Attribute.GetCustomAttribute (prop, typeof (TypeConverterAttribute));
 651                                 TypeConverter converter = convertAttr != null ? (TypeConverter) Activator.CreateInstance (Type.GetType (convertAttr.ConverterTypeName), true) : null;
 652                                 ConfigurationProperty cp = new ConfigurationProperty (name, prop.PropertyType, at.DefaultValue, converter, validator, at.Options);
 653
 654                                 cp.CollectionAttribute = Attribute.GetCustomAttribute (prop, typeof(ConfigurationCollectionAttribute)) as ConfigurationCollectionAttribute;
 655                                 properties.Add (cp);
 656                         }
 657                 }
 658
 659                 public ConfigurationCollectionAttribute CollectionAttribute
 660                 {
 661                         get { return collectionAttribute; }
 662                 }
 663
 664                 public bool HasProperties
 665                 {
 666                         get { return properties.Count > 0; }
 667                 }
 668
 669                 public ConfigurationPropertyCollection Properties
 670                 {
 671                         get {
 672                                 return properties;
 673                         }
 674                 }
 675         }
 676 }
 677
 678 #endif