mcs/class/Novell.Directory.Ldap/Novell.Directory.Ldap.Asn1/Asn1Object.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
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   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:
  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
  18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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  22 *******************************************************************************/
  23 //
  24 // Novell.Directory.Ldap.Asn1.Asn1Object.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 namespace Novell.Directory.Ldap.Asn1
  35 {
  36
  37         /// <summary> This is the base class for all other Asn1 types.</summary>
  38         [Serializable]
  39         public abstract class Asn1Object : System.Runtime.Serialization.ISerializable
  40         {
  41
  42                 private Asn1Identifier id;
  43
  44                 public Asn1Object(Asn1Identifier id)
  45                 {
  46                         this.id = id;
  47                         return ;
  48                 }
  49
  50                 public void GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
  51                 {
  52                 }
  53
  54                 /// <summary> Abstract method that must be implemented by each child
  55                 /// class to encode itself ( an Asn1Object) directly intto
  56                 /// a output stream.
  57                 ///
  58                 /// </summary>
  59                 /// <param name="out">The output stream onto which the encoded
  60                 /// Asn1Object will be placed.
  61                 /// </param>
  62                 abstract public void  encode(Asn1Encoder enc, System.IO.Stream out_Renamed);
  63
  64                 /// <summary> Returns the identifier for this Asn1Object as an Asn1Identifier.
  65                 /// This Asn1Identifier object will include the CLASS, FORM and TAG
  66                 /// for this Asn1Object.
  67                 /// </summary>
  68                 public virtual Asn1Identifier getIdentifier()
  69                 {
  70                         return id;
  71                 }
  72
  73                 /// <summary> Sets the identifier for this Asn1Object. This is helpful when
  74                 /// creating implicit Asn1Tagged types.
  75                 ///
  76                 /// </summary>
  77                 /// <param name="id">An Asn1Identifier object representing the CLASS,
  78                 /// FORM and TAG)
  79                 /// </param>
  80                 public virtual void  setIdentifier(Asn1Identifier id)
  81                 {
  82                         this.id = id;
  83                         return ;
  84                 }
  85
  86                 /// <summary> This method returns a byte array representing the encoded
  87                 /// Asn1Object.  It in turn calls the encode method that is
  88                 /// defined in Asn1Object but will usually be implemented
  89                 /// in the child Asn1 classses.
  90                 /// </summary>
  91                 [CLSCompliantAttribute(false)]
  92                 public sbyte[] getEncoding(Asn1Encoder enc)
  93                 {
  94                         System.IO.MemoryStream out_Renamed = new System.IO.MemoryStream();
  95                         try
  96                         {
  97                                 encode(enc, out_Renamed);
  98                         }
  99                         catch (System.IO.IOException e)
 100                         {
 101                                 // Should never happen - the current Asn1Object does not have
 102                                 // a encode method.
 103                                 throw new System.SystemException("IOException while encoding to byte array: " + e.ToString());
 104                         }
 105                         return SupportClass.ToSByteArray(out_Renamed.ToArray());
 106                 }
 107
 108                 /// <summary> Return a String representation of this Asn1Object.</summary>
 109                 [CLSCompliantAttribute(false)]
 110                 public override System.String ToString()
 111                 {
 112                         System.String[] classTypes = new System.String[]{"[UNIVERSAL ", "[APPLICATION ", "[CONTEXT ", "[PRIVATE "};
 113
 114                         System.Text.StringBuilder sb = new System.Text.StringBuilder();
 115                         Asn1Identifier id = getIdentifier(); // could be overridden.
 116
 117                         sb.Append(classTypes[id.Asn1Class]).Append(id.Tag).Append("] ");
 118
 119                         return sb.ToString();
 120                 }
 121         }
 122 }