mcs/class/Novell.Directory.Ldap/Novell.Directory.Ldap/LdapAttributeSet.cs

   1 /******************************************************************************
   2 * The MIT License
   3 * Copyright (c) 2003 Novell Inc.  www.novell.com
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining  a copy
   6 * of this software and associated documentation files (the Software), to deal
   7 * in the Software without restriction, including  without limitation the rights
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  10 * furnished to do so, subject to the following conditions:
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  15 * THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  23 //
  24 // Novell.Directory.Ldap.LdapAttributeSet.cs
  25 //
  26 // Author:
  27 //   Sunil Kumar (Sunilk@novell.com)
  28 //
  29 // (C) 2003 Novell, Inc (http://www.novell.com)
  30 //
  31
  32 using System;
  33
  34
  35 namespace Novell.Directory.Ldap
  36 {
  37
  38         /// <summary>
  39         /// A set of {@link LdapAttribute} objects.
  40         ///
  41         /// An <code>LdapAttributeSet</code> is a collection of <code>LdapAttribute</code>
  42         /// classes as returned from an <code>LdapEntry</code> on a search or read
  43         /// operation. <code>LdapAttributeSet</code> may be also used to contruct an entry
  44         /// to be added to a directory.  If the <code>add()</code> or <code>addAll()</code>
  45         /// methods are called and one or more of the objects to be added is not
  46         /// an <code>LdapAttribute, ClassCastException</code> is thrown (as discussed in the
  47         /// documentation for <code>java.util.Collection</code>).
  48         ///
  49         ///
  50         /// </summary>
  51         /// <seealso cref="LdapAttribute">
  52         /// </seealso>
  53         /// <seealso cref="LdapEntry">
  54         /// </seealso>
  55         public class LdapAttributeSet:AbstractSetSupport, System.ICloneable//, SupportClass.SetSupport
  56         {
  57                 /// <summary> Returns the number of attributes in this set.
  58                 ///
  59                 /// </summary>
  60                 /// <returns> number of attributes in this set.
  61                 /// </returns>
  62                 public override int Count
  63                 {
  64                         get
  65                         {
  66                                 return this.map.Count;
  67                         }
  68
  69                 }
  70
  71                 /// <summary> This is the underlying data structure for this set.
  72                 /// HashSet is similar to the functionality of this set.  The difference
  73                 /// is we use the name of an attribute as keys in the Map and LdapAttributes
  74                 /// as the values.  We also do not declare the map as transient, making the
  75                 /// map serializable.
  76                 /// </summary>
  77                 private System.Collections.Hashtable map;
  78
  79                 /// <summary> Constructs an empty set of attributes.</summary>
  80                 public LdapAttributeSet():base()
  81                 {
  82                         map = new System.Collections.Hashtable();
  83                 }
  84
  85                 // ---  methods not defined in Set ---
  86
  87                 /// <summary> Returns a deep copy of this attribute set.
  88                 ///
  89                 /// </summary>
  90                 /// <returns> A deep copy of this attribute set.
  91                 /// </returns>
  92                 public override System.Object Clone()
  93                 {
  94                         try
  95                         {
  96                                 System.Object newObj = base.MemberwiseClone();
  97                                 System.Collections.IEnumerator i = this.GetEnumerator();
  98                                 while (i.MoveNext())
  99                                 {
 100                                         ((LdapAttributeSet) newObj).Add(((LdapAttribute) i.Current).Clone());
 101                                 }
 102                                 return newObj;
 103                         }
 104                         catch (System.Exception ce)
 105                         {
 106                                 throw new System.SystemException("Internal error, cannot create clone");
 107                         }
 108                 }
 109
 110                 /// <summary> Returns the attribute matching the specified attrName.
 111                 ///
 112                 /// For example:
 113                 /// <ul>
 114                 /// <li><code>getAttribute("cn")</code>      returns only the "cn" attribute</li>
 115                 /// <li><code>getAttribute("cn;lang-en")</code> returns only the "cn;lang-en"
 116                 /// attribute.</li>
 117                 /// </ul>
 118                 /// In both cases, <code>null</code> is returned if there is no exact match to
 119                 /// the specified attrName.
 120                 ///
 121                 /// Note: Novell eDirectory does not currently support language subtypes.
 122                 /// It does support the "binary" subtype.
 123                 ///
 124                 /// </summary>
 125                 /// <param name="attrName">  The name of an attribute to retrieve, with or without
 126                 /// subtype specifications. For example, "cn", "cn;phonetic", and
 127                 /// "cn;binary" are valid attribute names.
 128                 ///
 129                 /// </param>
 130                 /// <returns> The attribute matching the specified attrName, or <code>null</code>
 131                 /// if there is no exact match.
 132                 /// </returns>
 133                 public virtual LdapAttribute getAttribute(System.String attrName)
 134                 {
 135                         return (LdapAttribute) map[attrName.ToUpper()];
 136                 }
 137
 138                 /// <summary> Returns a single best-match attribute, or <code>null</code> if no match is
 139                 /// available in the entry.
 140                 ///
 141                 /// Ldap version 3 allows adding a subtype specification to an attribute
 142                 /// name. For example, "cn;lang-ja" indicates a Japanese language
 143                 /// subtype of the "cn" attribute and "cn;lang-ja-JP-kanji" may be a subtype
 144                 /// of "cn;lang-ja". This feature may be used to provide multiple
 145                 /// localizations in the same directory. For attributes which do not vary
 146                 /// among localizations, only the base attribute may be stored, whereas
 147                 /// for others there may be varying degrees of specialization.
 148                 ///
 149                 /// For example, <code>getAttribute(attrName,lang)</code> returns the
 150                 /// <code>LdapAttribute</code> that exactly matches attrName and that
 151                 /// best matches lang.
 152                 ///
 153                 /// If there are subtypes other than "lang" subtypes included
 154                 /// in attrName, for example, "cn;binary", only attributes with all of
 155                 /// those subtypes are returned. If lang is <code>null</code> or empty, the
 156                 /// method behaves as getAttribute(attrName). If there are no matching
 157                 /// attributes, <code>null</code> is returned.
 158                 ///
 159                 ///
 160                 /// Assume the entry contains only the following attributes:
 161                 ///
 162                 /// <ul>
 163                 /// <li>cn;lang-en</li>
 164                 /// <li>cn;lang-ja-JP-kanji</li>
 165                 /// <li>sn</li>
 166                 /// </ul>
 167                 ///
 168                 /// Examples:
 169                 /// <ul>
 170                 /// <li><code>getAttribute( "cn" )</code>       returns <code>null</code>.</li>
 171                 /// <li><code>getAttribute( "sn" )</code>       returns the "sn" attribute.</li>
 172                 /// <li><code>getAttribute( "cn", "lang-en-us" )</code>
 173                 /// returns the "cn;lang-en" attribute.</li>
 174                 /// <li><code>getAttribute( "cn", "lang-en" )</code>
 175                 /// returns the "cn;lang-en" attribute.</li>
 176                 /// <li><code>getAttribute( "cn", "lang-ja" )</code>
 177                 /// returns <code>null</code>.</li>
 178                 /// <li><code>getAttribute( "sn", "lang-en" )</code>
 179                 /// returns the "sn" attribute.</li>
 180                 /// </ul>
 181                 ///
 182                 /// Note: Novell eDirectory does not currently support language subtypes.
 183                 /// It does support the "binary" subtype.
 184                 ///
 185                 /// </summary>
 186                 /// <param name="attrName"> The name of an attribute to retrieve, with or without
 187                 /// subtype specifications. For example, "cn", "cn;phonetic", and
 188                 /// cn;binary" are valid attribute names.
 189                 ///
 190                 /// </param>
 191                 /// <param name="lang">  A language specification with optional subtypes
 192                 /// appended using "-" as separator. For example, "lang-en", "lang-en-us",
 193                 /// "lang-ja", and "lang-ja-JP-kanji" are valid language specification.
 194                 ///
 195                 /// </param>
 196                 /// <returns> A single best-match <code>LdapAttribute</code>, or <code>null</code>
 197                 /// if no match is found in the entry.
 198                 ///
 199                 /// </returns>
 200                 public virtual LdapAttribute getAttribute(System.String attrName, System.String lang)
 201                 {
 202                         System.String key = attrName + ";" + lang;
 203                         return (LdapAttribute) map[key.ToUpper()];
 204                 }
 205
 206                 /// <summary> Creates a new attribute set containing only the attributes that have
 207                 /// the specified subtypes.
 208                 ///
 209                 /// For example, suppose an attribute set contains the following
 210                 /// attributes:
 211                 ///
 212                 /// <ul>
 213                 /// <li>    cn</li>
 214                 /// <li>    cn;lang-ja</li>
 215                 /// <li>    sn;phonetic;lang-ja</li>
 216                 /// <li>    sn;lang-us</li>
 217                 /// </ul>
 218                 ///
 219                 /// Calling the <code>getSubset</code> method and passing lang-ja as the
 220                 /// argument, the method returns an attribute set containing the following
 221                 /// attributes:
 222                 ///
 223                 /// <ul>
 224                 /// <li>cn;lang-ja</li>
 225                 /// <li>sn;phonetic;lang-ja</li>
 226                 /// </ul>
 227                 ///
 228                 /// </summary>
 229                 /// <param name="subtype">   Semi-colon delimited list of subtypes to include. For
 230                 /// example:
 231                 /// <ul>
 232                 /// <li> "lang-ja" specifies only Japanese language subtypes</li>
 233                 /// <li> "binary" specifies only binary subtypes</li>
 234                 /// <li> "binary;lang-ja" specifies only Japanese language subtypes
 235                 /// which also are binary</li>
 236                 /// </ul>
 237                 ///
 238                 /// Note: Novell eDirectory does not currently support language subtypes.
 239                 /// It does support the "binary" subtype.
 240                 ///
 241                 /// </param>
 242                 /// <returns> An attribute set containing the attributes that match the
 243                 /// specified subtype.
 244                 /// </returns>
 245                 public virtual LdapAttributeSet getSubset(System.String subtype)
 246                 {
 247
 248                         // Create a new tempAttributeSet
 249                         LdapAttributeSet tempAttributeSet = new LdapAttributeSet();
 250                         System.Collections.IEnumerator i = this.GetEnumerator();
 251
 252                         // Cycle throught this.attributeSet
 253                         while (i.MoveNext())
 254                         {
 255                                 LdapAttribute attr = (LdapAttribute) i.Current;
 256
 257                                 // Does this attribute have the subtype we are looking for. If
 258                                 // yes then add it to our AttributeSet, else next attribute
 259                                 if (attr.hasSubtype(subtype))
 260                                         tempAttributeSet.Add(attr.Clone());
 261                         }
 262                         return tempAttributeSet;
 263                 }
 264
 265                 // --- methods defined in set ---
 266
 267                 /// <summary> Returns an iterator over the attributes in this set.  The attributes
 268                 /// returned from this iterator are not in any particular order.
 269                 ///
 270                 /// </summary>
 271                 /// <returns> iterator over the attributes in this set
 272                 /// </returns>
 273                 public  override  System.Collections.IEnumerator GetEnumerator()
 274                 {
 275                         return this.map.Values.GetEnumerator();
 276                 }
 277
 278                 /// <summary> Returns <code>true</code> if this set contains no elements
 279                 ///
 280                 /// </summary>
 281                 /// <returns> <code>true</code> if this set contains no elements
 282                 /// </returns>
 283                 public override bool IsEmpty()
 284                 {
 285                         return (this.map.Count == 0);
 286                 }
 287
 288                 /// <summary> Returns <code>true</code> if this set contains an attribute of the same name
 289                 /// as the specified attribute.
 290                 ///
 291                 /// </summary>
 292                 /// <param name="attr">  Object of type <code>LdapAttribute</code>
 293                 ///
 294                 /// </param>
 295                 /// <returns> true if this set contains the specified attribute
 296                 ///
 297                 /// @throws ClassCastException occurs the specified Object
 298                 /// is not of type LdapAttribute.
 299                 /// </returns>
 300                 public override bool Contains(object attr)
 301                 {
 302                         LdapAttribute attribute = (LdapAttribute) attr;
 303                         return this.map.ContainsKey(attribute.Name.ToUpper());
 304                 }
 305
 306                 /// <summary> Adds the specified attribute to this set if it is not already present.
 307                 /// If an attribute with the same name already exists in the set then the
 308                 /// specified attribute will not be added.
 309                 ///
 310                 /// </summary>
 311                 /// <param name="attr">  Object of type <code>LdapAttribute</code>
 312                 ///
 313                 /// </param>
 314                 /// <returns> true if the attribute was added.
 315                 ///
 316                 /// @throws ClassCastException occurs the specified Object
 317                 /// is not of type <code>LdapAttribute</code>.
 318                 /// </returns>
 319                 public override bool Add(object attr)
 320                 {
 321                         //We must enforce that attr is an LdapAttribute
 322                         LdapAttribute attribute = (LdapAttribute) attr;
 323                         System.String name = attribute.Name.ToUpper();
 324                         if (this.map.ContainsKey(name))
 325                                 return false;
 326                         else
 327                         {
 328                                 SupportClass.PutElement(this.map, name, attribute);
 329                                 return true;
 330                         }
 331                 }
 332
 333                 /// <summary> Removes the specified object from this set if it is present.
 334                 ///
 335                 /// If the specified object is of type <code>LdapAttribute</code>, the
 336                 /// specified attribute will be removed.  If the specified object is of type
 337                 /// <code>String</code>, the attribute with a name that matches the string will
 338                 /// be removed.
 339                 ///
 340                 /// </summary>
 341                 /// <param name="object">LdapAttribute to be removed or <code>String</code> naming
 342                 /// the attribute to be removed.
 343                 ///
 344                 /// </param>
 345                 /// <returns> true if the object was removed.
 346                 ///
 347                 /// @throws ClassCastException occurs the specified Object
 348                 /// is not of type <code>LdapAttribute</code> or of type <code>String</code>.
 349                 /// </returns>
 350                 public override bool Remove(object object_Renamed)
 351                 {
 352                         System.String attributeName; //the name is the key to object in the HashMap
 353                         if (object_Renamed is System.String)
 354                         {
 355                                 attributeName = ((System.String) object_Renamed);
 356                         }
 357                         else
 358                         {
 359                                 attributeName = ((LdapAttribute) object_Renamed).Name;
 360                         }
 361                         if ((System.Object) attributeName == null)
 362                         {
 363                                 return false;
 364                         }
 365                         return (SupportClass.HashtableRemove(this.map, attributeName.ToUpper()) != null);
 366                 }
 367
 368                 /// <summary> Removes all of the elements from this set.</summary>
 369                 public override void Clear()
 370                 {
 371                         this.map.Clear();
 372                 }
 373
 374                 /// <summary> Adds all <code>LdapAttribute</code> objects in the specified collection to
 375                 /// this collection.
 376                 ///
 377                 /// </summary>
 378                 /// <param name="c"> Collection of <code>LdapAttribute</code> objects.
 379                 ///
 380                 /// @throws ClassCastException occurs when an element in the
 381                 /// collection is not of type <code>LdapAttribute</code>.
 382                 ///
 383                 /// </param>
 384                 /// <returns> true if this set changed as a result of the call.
 385                 /// </returns>
 386                 public override bool AddAll(System.Collections.ICollection c)
 387                 {
 388                         bool setChanged = false;
 389                         System.Collections.IEnumerator i = c.GetEnumerator();
 390
 391                         while (i.MoveNext())
 392                         {
 393                                 // we must enforce that everything in c is an LdapAttribute
 394                                 // add will return true if the attribute was added
 395                                 if (this.Add(i.Current))
 396                                 {
 397                                         setChanged = true;
 398                                 }
 399                         }
 400                         return setChanged;
 401                 }
 402
 403                 /// <summary> Returns a string representation of this LdapAttributeSet
 404                 ///
 405                 /// </summary>
 406                 /// <returns> a string representation of this LdapAttributeSet
 407                 /// </returns>
 408                 public override System.String ToString()
 409                 {
 410                         System.Text.StringBuilder retValue = new System.Text.StringBuilder("LdapAttributeSet: ");
 411                         System.Collections.IEnumerator attrs = GetEnumerator();
 412                         bool first = true;
 413                         while (attrs.MoveNext())
 414                         {
 415                                 if (!first)
 416                                 {
 417                                         retValue.Append(" ");
 418                                 }
 419                                 first = false;
 420                                 LdapAttribute attr = (LdapAttribute) attrs.Current;
 421                                 retValue.Append(attr.ToString());
 422                         }
 423                         return retValue.ToString();
 424                 }
 425         }
 426 }