Wed Feb 24 15:47:16 CET 2010 Paolo Molaro <lupus@ximian.com>
[mono.git] / mcs / class / corlib / System.Runtime.Remoting / ObjRef.cs
index f4e9f0eadc92f1e952747559229819e80830c19d..7c5edb0a859d0465b0bfa07685fe61a2bae3d44b 100644 (file)
 // (C) Ximian, Inc.  http://www.ximian.com
 //
 
+//
+// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
 using System;
 using System.Runtime.Serialization;
 using System.Runtime.Remoting.Channels;
 using System.Runtime.Remoting.Messaging;
 using System.Runtime.Remoting.Proxies;
 
+using System.Runtime.ConstrainedExecution;
+
 namespace System.Runtime.Remoting {
 
        [Serializable]
+       [System.Runtime.InteropServices.ComVisible (true)]
        public class ObjRef : IObjectReference, ISerializable 
        {
                IChannelInfo channel_info;
                string uri;
                IRemotingTypeInfo typeInfo;
                IEnvoyInfo envoyInfo;
-               [NonSerialized] bool marshalledValue = true;
+               int flags;
+               Type _serverType;
+
+               static int MarshalledObjectRef = 1;
+               static int WellKnowObjectRef = 2;
                
                public ObjRef ()
                {
                        // no idea why this needs to be public
-                       channel_info = new ChannelInfoStore ();
+
+                       UpdateChannelInfo();
                }
 
-               internal bool IsPossibleToCAD () {
-                       // we should check if this obj ref belongs to a cross app context
-                       return true;
+               internal ObjRef (string typeName, string uri, IChannelInfo cinfo) 
+               {
+                       this.uri = uri;
+                       channel_info = cinfo;
+                       typeInfo = new TypeInfo (Type.GetType (typeName, true));
                }
 
-               internal ObjRef (ObjRef o) {
+               internal ObjRef (ObjRef o, bool unmarshalAsProxy) {
                        channel_info = o.channel_info;
                        uri = o.uri;
        
                        typeInfo = o.typeInfo;
                        envoyInfo = o.envoyInfo;
-                       marshalledValue = true;
+                       flags = o.flags;
+                       if (unmarshalAsProxy) flags |= MarshalledObjectRef;
                }
-               
-               public ObjRef (MarshalByRefObject mbr, Type type)
+
+               public ObjRef (MarshalByRefObject o, Type requestedType)
                {
-                       if (mbr == null)
-                               throw new ArgumentNullException ("mbr");
+                       if (o == null)
+                               throw new ArgumentNullException ("o");
                        
-                       if (type == null)
-                               throw new ArgumentNullException ("type");
+                       if (requestedType == null)
+                               throw new ArgumentNullException ("requestedType");
 
-                       // The ObjRef can only be constructed if the given mbr
+                       // The ObjRef can only be constructed if the given o
                        // has already been marshalled using RemotingServices.Marshall
 
-                       uri = RemotingServices.GetObjectUri(mbr);
+                       uri = RemotingServices.GetObjectUri (o);
+                       typeInfo = new TypeInfo (requestedType);
+
+                       if (!requestedType.IsInstanceOfType (o))
+                               throw new RemotingException ("The server object type cannot be cast to the requested type " + requestedType.FullName);
+
+                       UpdateChannelInfo();
+               }
+
+               internal ObjRef (Type type, string url, object remoteChannelData)
+               {
+                       uri = url;
                        typeInfo = new TypeInfo(type);
 
-                       if (!typeInfo.CanCastTo(mbr.GetType(), mbr))
-                               throw new RemotingException ("The server object type cannot be cast to the requested type " + type.FullName + ".");
+                       if (remoteChannelData != null)
+                               channel_info = new ChannelInfo (remoteChannelData);
 
-                       channel_info = new ChannelInfoStore ();
+                       flags |= WellKnowObjectRef;
                }
 
-               protected ObjRef (SerializationInfo si, StreamingContext sc)
+               protected ObjRef (SerializationInfo info, StreamingContext context)
                {
-                       SerializationInfoEnumerator en = si.GetEnumerator();
+                       SerializationInfoEnumerator en = info.GetEnumerator();
                        // Info to serialize: uri, objrefFlags, typeInfo, envoyInfo, channelInfo
 
-                       marshalledValue = true;
+                       bool marshalledValue = true;
 
                        while (en.MoveNext ()) {
                                switch (en.Name) {
@@ -91,24 +136,40 @@ namespace System.Runtime.Remoting {
                                case "fIsMarshalled":
                                        int status;
                                        Object o = en.Value;
-                                       if (o.GetType().Equals(typeof(String)))\r
-                                               status = ((IConvertible) o).ToInt32(null);\r
-                                       else\r
-                                               status = (int) o;\r
+                                       if (o is string)
+                                               status = ((IConvertible) o).ToInt32(null);
+                                       else
+                                               status = (int) o;
 
                                        if (status == 0)
                                                marshalledValue = false;
                                        break;
-                               case "objrefFlags":             // FIXME: do something with this
+                               case "objrefFlags":
+                                       flags = Convert.ToInt32 (en.Value);
                                        break;
                                default:
                                        throw new NotSupportedException ();
                                }
                        }
+                       if (marshalledValue) flags |= MarshalledObjectRef;
                }
 
-               public virtual IChannelInfo ChannelInfo {
+               internal bool IsPossibleToCAD () 
+               {
+                       // we should check if this obj ref belongs to a cross app context.
 
+                       // Return false. If not, serialization of this ObjRef will not work
+                       // on the target AD.
+                       return false;
+               }
+
+               internal bool IsReferenceToWellKnow
+               {
+                       get { return (flags & WellKnowObjectRef) > 0; }
+               }
+
+               public virtual IChannelInfo ChannelInfo {
+               [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
                        get {
                                return channel_info;
                        }
@@ -118,17 +179,15 @@ namespace System.Runtime.Remoting {
                        }
                }
                
-               [MonoTODO]
                public virtual IEnvoyInfo EnvoyInfo {
                        get {
-                               throw new NotImplementedException ();
+                               return envoyInfo;
                        }
                        set {
-                               throw new NotImplementedException ();
+                               envoyInfo = value;
                        }
                }
                
-               [MonoTODO]
                public virtual IRemotingTypeInfo TypeInfo {
                        get {
                                return typeInfo;
@@ -147,20 +206,20 @@ namespace System.Runtime.Remoting {
                        }
                }
 
-               public virtual void GetObjectData (SerializationInfo si, StreamingContext sc)
+               public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
                {
-                       si.SetType (GetType());
-                       si.AddValue ("uri", uri);
-                       si.AddValue ("typeInfo", typeInfo, typeof (IRemotingTypeInfo));
-                       si.AddValue ("envoyInfo", envoyInfo, typeof (IEnvoyInfo));
-                       si.AddValue ("channelInfo", channel_info, typeof(IChannelInfo));
-                       si.AddValue ("objrefFlags", 0);
+                       info.SetType (GetType());
+                       info.AddValue ("uri", uri);
+                       info.AddValue ("typeInfo", typeInfo, typeof (IRemotingTypeInfo));
+                       info.AddValue ("envoyInfo", envoyInfo, typeof (IEnvoyInfo));
+                       info.AddValue ("channelInfo", channel_info, typeof(IChannelInfo));
+                       info.AddValue ("objrefFlags", flags);
                }
 
-               public virtual object GetRealObject (StreamingContext sc)
+               public virtual object GetRealObject (StreamingContext context)
                {
-                       if (marshalledValue)
-                               return RemotingServices.GetRemoteObject(Type.GetType(typeInfo.TypeName), null, channel_info.ChannelData, uri);
+                       if ((flags & MarshalledObjectRef) > 0)
+                               return RemotingServices.Unmarshal (this);
                        else
                                return this;
                }
@@ -173,18 +232,32 @@ namespace System.Runtime.Remoting {
                        return identity.IsFromThisAppDomain;
                }
 
-               [MonoTODO]
+               [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
                public bool IsFromThisProcess ()
                {
-                       // as yet we do not consider this optimization
-                       return false;
+                       foreach (object data in channel_info.ChannelData)
+                       {
+                               if (data is CrossAppDomainData)
+                               {
+                                       string refProcId = ((CrossAppDomainData)data).ProcessID;
+                                       return (refProcId == RemotingConfiguration.ProcessId);
+                               }
+                       }
+                       
+                       return true;
                }
 
-               internal object GetInternalObject () {
-                       if (!marshalledValue)
-                               return this;
-                       else {
-                               return RemotingServices.Unmarshal (this);
+               internal void UpdateChannelInfo()
+               {
+                       channel_info = new ChannelInfo ();
+               }
+
+               internal Type ServerType
+               {
+                       get
+                       {
+                               if (_serverType == null) _serverType = Type.GetType (typeInfo.TypeName);
+                               return _serverType;
                        }
                }
        }