2 // System.DelegateSerializationHolder.cs
5 // Lluis Sanchez Gual (lsg@ctv.es)
7 // (C) 2003 Lluis Sanchez Gual
11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
13 // Permission is hereby granted, free of charge, to any person obtaining
14 // a copy of this software and associated documentation files (the
15 // "Software"), to deal in the Software without restriction, including
16 // without limitation the rights to use, copy, modify, merge, publish,
17 // distribute, sublicense, and/or sell copies of the Software, and to
18 // permit persons to whom the Software is furnished to do so, subject to
19 // the following conditions:
21 // The above copyright notice and this permission notice shall be
22 // included in all copies or substantial portions of the Software.
24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 using System
.Reflection
;
34 using System
.Runtime
.Serialization
;
35 using System
.Runtime
.Remoting
;
40 internal class DelegateSerializationHolder
: ISerializable
, IObjectReference
42 Delegate _delegate
; // The deserialized delegate
50 string targetTypeAssembly
;
51 string targetTypeName
;
53 public DelegateEntry delegateEntry
; // next delegate in the invocation list
55 // A DelegateEntry holds information about a delegate that is part
56 // of an invocation list of a multicast delegate.
57 public DelegateEntry (Delegate del
, string targetLabel
)
59 type
= del
.GetType().FullName
;
60 assembly
= del
.GetType().Assembly
.FullName
;
62 targetTypeAssembly
= del
.Method
.DeclaringType
.Assembly
.FullName
;
63 targetTypeName
= del
.Method
.DeclaringType
.FullName
;
64 methodName
= del
.Method
.Name
;
67 public Delegate
DeserializeDelegate (SerializationInfo info
, int index
)
69 object realTarget
= null;
71 realTarget
= info
.GetValue (target
.ToString(), typeof(object));
73 var key
= "method" + index
;
74 var method
= (MethodInfo
)info
.GetValueNoThrow (key
, typeof(MethodInfo
));
76 Assembly dasm
= Assembly
.Load (assembly
);
77 Type dt
= dasm
.GetType (type
);
79 if (realTarget
!= null) {
81 if (RemotingServices
.IsTransparentProxy (realTarget
)) {
82 // The call to IsInstanceOfType will force the proxy
83 // to load the real type of the remote object. This is
84 // needed to make sure that subsequent calls to
85 // GetType() return the expected type.
86 Assembly tasm
= Assembly
.Load (targetTypeAssembly
);
87 Type tt
= tasm
.GetType (targetTypeName
);
88 if (!tt
.IsInstanceOfType (realTarget
))
89 throw new RemotingException ("Unexpected proxy type.");
92 return method
== null ?
93 Delegate
.CreateDelegate (dt
, realTarget
, methodName
) :
94 Delegate
.CreateDelegate (dt
, realTarget
, method
);
98 return Delegate
.CreateDelegate (dt
, realTarget
, method
);
100 Type tt2
= Assembly
.Load (targetTypeAssembly
).GetType (targetTypeName
);
101 return Delegate
.CreateDelegate (dt
, tt2
, methodName
);
105 DelegateSerializationHolder(SerializationInfo info
, StreamingContext ctx
)
107 DelegateEntry entryChain
= (DelegateEntry
)info
.GetValue ("Delegate", typeof(DelegateEntry
));
109 // Count the number of delegates to combine
111 DelegateEntry entry
= entryChain
;
112 while (entry
!= null) {
113 entry
= entry
.delegateEntry
;
117 // Deserializes and combines the delegates
119 _delegate
= entryChain
.DeserializeDelegate (info
, 0);
122 Delegate
[] delegates
= new Delegate
[count
];
124 for (int n
=0; n
<count
; n
++)
126 delegates
[n
] = entry
.DeserializeDelegate (info
, n
);
127 entry
= entry
.delegateEntry
;
129 _delegate
= Delegate
.Combine (delegates
);
133 public static void GetDelegateData (Delegate instance
, SerializationInfo info
, StreamingContext ctx
)
135 // Fills a SerializationInfo object with the information of the delegate.
137 Delegate
[] delegates
= instance
.GetInvocationList ();
138 DelegateEntry lastEntry
= null;
139 for (int n
=0; n
<delegates
.Length
; n
++) {
140 Delegate del
= delegates
[n
];
141 string targetLabel
= (del
.Target
!= null) ? ("target" + n
) : null;
142 DelegateEntry entry
= new DelegateEntry (del
, targetLabel
);
144 if (lastEntry
== null)
145 info
.AddValue ("Delegate", entry
);
147 lastEntry
.delegateEntry
= entry
;
150 if (del
.Target
!= null)
151 info
.AddValue (targetLabel
, del
.Target
);
153 info
.AddValue ("method" + n
, del
.Method
);
155 info
.SetType (typeof (DelegateSerializationHolder
));
158 public void GetObjectData (SerializationInfo info
, StreamingContext context
)
161 throw new NotSupportedException ();
164 public object GetRealObject (StreamingContext context
)