class/corlib/System/MarshalByRefObject.cs

   1 //
   2 // System.MarshalByRefObject.cs
   3 //
   4 // Authors:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Lluis Sanchez Gual (lsg@ctv.es)
   7 //   Patrik Torstensson (totte_mono@yahoo.com)
   8 //
   9 // (C) Ximian, Inc.  http://www.ximian.com
  10 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Threading;
  33 using System.Runtime.Remoting;
  34 using System.Security.Permissions;
  35 using System.Runtime.InteropServices;
  36
  37 namespace System
  38 {
  39         [Serializable]
  40         [ComVisible (true)]
  41         public abstract class MarshalByRefObject
  42         {
  43                 [NonSerialized]
  44                 private ServerIdentity _identity; // Holds marshalling iformation of the object
  45
  46                 protected MarshalByRefObject ()
  47                 {
  48                 }
  49
  50                 internal Identity GetObjectIdentity (MarshalByRefObject obj, out bool IsClient)
  51                 {
  52                         IsClient = false;
  53                         Identity objId = null;
  54
  55                         if (RemotingServices.IsTransparentProxy (obj)) {
  56                                 objId = RemotingServices.GetRealProxy (obj).ObjectIdentity;
  57                                 IsClient = true;
  58                         }
  59                         else {
  60                                 objId = obj.ObjectIdentity;
  61                         }
  62
  63                         return objId;
  64                 }
  65
  66                 internal ServerIdentity ObjectIdentity {
  67                         get { return _identity; }
  68                         set { _identity = value; }
  69                 }
  70
  71                 [SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
  72                 public virtual ObjRef CreateObjRef (Type requestedType)
  73                 {
  74                         // This method can only be called when this object has been marshalled
  75                         if (_identity == null)
  76                                 throw new RemotingException (Locale.GetText ("No remoting information was found for the object."));
  77                         return _identity.CreateObjRef (requestedType);
  78                 }
  79
  80                 // corcompare says it is "virtual final", so there is likely
  81                 // an internal interface in .NET.
  82                 [SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
  83                 public object GetLifetimeService ()
  84                 {
  85                         if (_identity == null)
  86                                 return null;
  87                         else return _identity.Lease;
  88                 }
  89
  90                 [SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
  91                 public virtual object InitializeLifetimeService ()
  92                 {
  93                         if (_identity != null && _identity.Lease != null)
  94                                 return _identity.Lease;
  95                         else
  96                                 return new System.Runtime.Remoting.Lifetime.Lease();
  97                 }
  98
  99                 protected MarshalByRefObject MemberwiseClone (bool cloneIdentity)
 100                 {
 101                         MarshalByRefObject mbr = (MarshalByRefObject) MemberwiseClone ();
 102                         if (!cloneIdentity)
 103                                 mbr._identity = null;
 104                         return mbr;
 105                 }
 106         }
 107 }