mcs/class/Novell.Directory.Ldap/Novell.Directory.Ldap.Controls/LdapEntryChangeControl.cs

   1 /******************************************************************************
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  10 * furnished to do so, subject to the following conditions:
  11 *
  12 * The above copyright notice and this permission notice shall be included in
  13 * all copies or substantial portions of the Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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  17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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  22 *******************************************************************************/
  23 //
  24 // Novell.Directory.Ldap.Controls.LdapEntryChangeControl.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 using Novell.Directory.Ldap;
  34 using Novell.Directory.Ldap.Asn1;
  35
  36 namespace Novell.Directory.Ldap.Controls
  37 {
  38
  39         /// <summary>  LdapEntryChangeControl is a Server Control returned at the request
  40         /// of the client in response to a persistent search request. It
  41         /// contains additional information about a change such as what type of
  42         /// change occurred.
  43         /// </summary>
  44         public class LdapEntryChangeControl:LdapControl
  45         {
  46                 /// <summary>  returns the record number of the change in the servers change log.
  47                 ///
  48                 /// </summary>
  49                 /// <returns>  the record number of the change in the server's change log.
  50                 /// The server may not return a change number. In this case the return
  51                 /// value is -1
  52                 /// </returns>
  53                 virtual public bool HasChangeNumber
  54                 {
  55
  56
  57                         get
  58                         {
  59                                 return m_hasChangeNumber;
  60                         }
  61
  62                 }
  63                 /// <summary>  returns the record number of the change in the servers change log.
  64                 ///
  65                 /// </summary>
  66                 /// <returns>  the record number of the change in the server's change log.
  67                 /// The server may not return a change number. In this case the return
  68                 /// value is -1
  69                 /// </returns>
  70                 virtual public int ChangeNumber
  71                 {
  72
  73
  74                         get
  75                         {
  76                                 return m_changeNumber;
  77                         }
  78
  79                 }
  80                 /// <summary>  Returns the type of change that occured
  81                 ///
  82                 /// </summary>
  83                 /// <returns>  returns one of the following values indicating the type of
  84                 /// change that occurred:
  85                 /// LdapPersistSearchControl.ADD
  86                 /// LdapPersistSearchControl.DELETE
  87                 /// LdapPersistSearchControl.MODIFY
  88                 /// LdapPersistSearchControl.MODDN.
  89                 /// </returns>
  90                 virtual public int ChangeType
  91                 {
  92                         get
  93                         {
  94                                 return m_changeType;
  95                         }
  96
  97                 }
  98                 /// <summary>  Returns the previous DN of the entry, if it was renamed.
  99                 ///
 100                 /// </summary>
 101                 /// <returns>  the previous DN of the entry if the entry was renamed (ie. if the
 102                 /// change type is LdapersistSearchControl.MODDN.
 103                 /// </returns>
 104                 virtual public System.String PreviousDN
 105                 {
 106                         get
 107                         {
 108                                 return m_previousDN;
 109                         }
 110
 111                 }
 112                 private int m_changeType;
 113                 private System.String m_previousDN;
 114                 private bool m_hasChangeNumber;
 115                 private int m_changeNumber;
 116
 117                 /// <summary>  This constructor is called by the SDK to create an
 118                 /// LdapEntryChangeControl. This constructor should NOT be called by
 119                 /// application developers. It must be public since it resides in a
 120                 /// different package than the classes that call it.
 121                 /// The Entry Change Control is defined as follows:
 122                 /// EntryChangeNotification ::= SEQUENCE {
 123                 /// changeType ENUMERATED {
 124                 /// add             (1),
 125                 /// delete          (2),
 126                 /// modify          (4),
 127                 /// modDN           (8)
 128                 /// },
 129                 /// previousDN   LdapDN OPTIONAL,     -- modifyDN ops. only
 130                 /// changeNumber INTEGER OPTIONAL     -- if supported
 131                 /// }
 132                 ///
 133                 /// </summary>
 134                 /// <param name="oid">    The OID of the control, as a dotted string.
 135                 ///
 136                 /// </param>
 137                 /// <param name="critical">  True if the Ldap operation should be discarded if
 138                 /// the control is not supported. False if
 139                 /// the operation can be processed without the control.
 140                 ///
 141                 /// </param>
 142                 /// <param name="value">    The control-specific data.
 143                 /// </param>
 144                 [CLSCompliantAttribute(false)]
 145                 public LdapEntryChangeControl(System.String oid, bool critical, sbyte[] value_Renamed):base(oid, critical, value_Renamed)
 146                 {
 147
 148                         // Create a decoder objet
 149                         LBERDecoder decoder = new LBERDecoder();
 150                         if (decoder == null)
 151                                 throw new System.IO.IOException("Decoding error.");
 152
 153                         // We should get a sequence initially
 154                         Asn1Object asnObj = decoder.decode(value_Renamed);
 155
 156                         if ((asnObj == null) || (!(asnObj is Asn1Sequence)))
 157                                 throw new System.IO.IOException("Decoding error.");
 158
 159                         Asn1Sequence sequence = (Asn1Sequence) asnObj;
 160
 161
 162                         // The first element in the sequence should be an enumerated type
 163                         Asn1Object asn1Obj = sequence.get_Renamed(0);
 164                         if ((asn1Obj == null) || (!(asn1Obj is Asn1Enumerated)))
 165                                 throw new System.IO.IOException("Decoding error.");
 166
 167                         m_changeType = ((Asn1Enumerated) asn1Obj).intValue();
 168
 169                         //check for optional elements
 170                         if ((sequence.size() > 1) && (m_changeType == 8))
 171                         //8 means modifyDN
 172                         {
 173                                 // get the previous DN - it is encoded as an octet string
 174                                 asn1Obj = sequence.get_Renamed(1);
 175                                 if ((asn1Obj == null) || (!(asn1Obj is Asn1OctetString)))
 176                                         throw new System.IO.IOException("Decoding error get previous DN");
 177
 178                                 m_previousDN = ((Asn1OctetString) asn1Obj).stringValue();
 179                         }
 180                         else
 181                         {
 182                                 m_previousDN = "";
 183                         }
 184
 185                         //check for change number
 186                         if (sequence.size() == 3)
 187                         {
 188                                 asn1Obj = sequence.get_Renamed(2);
 189                                 if ((asn1Obj == null) || (!(asn1Obj is Asn1Integer)))
 190                                         throw new System.IO.IOException("Decoding error getting change number");
 191
 192                                 m_changeNumber = ((Asn1Integer) asn1Obj).intValue();
 193                                 m_hasChangeNumber = true;
 194                         }
 195                         else
 196                                 m_hasChangeNumber = false;
 197                         return ;
 198                 }
 199
 200                 /// <summary>  Returns a string representation of the control for debugging.</summary>
 201                 public override System.String ToString()
 202                 {
 203                         return base.ToString();
 204                 }
 205         } //end class LdapEntryChangeControl
 206 }