1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
//
// System.Runtime.Serialization.SerializationObjectManager.cs
//
// Author:
// Robert Jordan (robertj@gmx.net)
//
// Copyright (C) 2006 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.Collections;
namespace System.Runtime.Serialization {
public sealed class SerializationObjectManager
{
readonly StreamingContext context;
readonly Hashtable seen = new Hashtable (HashHelper.Instance, HashHelper.Instance);
event SerializationCallbacks.CallbackHandler callbacks;
public SerializationObjectManager (StreamingContext context)
{
this.context = context;
}
public void RegisterObject (object obj)
{
if (seen.Contains (obj))
return;
SerializationCallbacks sc = SerializationCallbacks
.GetSerializationCallbacks (obj.GetType ());
seen [obj] = HashHelper.NonNullObject;
sc.RaiseOnSerializing (obj, context);
if (sc.HasSerializedCallbacks) {
// record for later invocation
callbacks += delegate (StreamingContext ctx)
{
sc.RaiseOnSerialized (obj, ctx);
};
}
}
public void RaiseOnSerializedEvent ()
{
if (callbacks != null)
callbacks (context);
}
class HashHelper : IHashCodeProvider, IComparer {
public static object NonNullObject = new object ();
public static HashHelper Instance = new HashHelper ();
private HashHelper ()
{
}
public int GetHashCode (object obj)
{
if (obj == null)
return 0;
return Object.InternalGetHashCode (obj);
}
public int Compare (object x, object y)
{
return Object.ReferenceEquals (x, y) ? 0 : 1;
}
}
}
}
|
