95 lines
2.6 KiB
C#
95 lines
2.6 KiB
C#
//
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// System.Runtime.Serialization.SerializationObjectManager.cs
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//
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// Author:
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// Robert Jordan (robertj@gmx.net)
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//
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// Copyright (C) 2006 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections;
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namespace System.Runtime.Serialization {
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public sealed class SerializationObjectManager
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{
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readonly StreamingContext context;
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readonly Hashtable seen = new Hashtable (HashHelper.Instance, HashHelper.Instance);
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event SerializationCallbacks.CallbackHandler callbacks;
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public SerializationObjectManager (StreamingContext context)
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{
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this.context = context;
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}
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public void RegisterObject (object obj)
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{
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if (seen.Contains (obj))
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return;
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SerializationCallbacks sc = SerializationCallbacks
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.GetSerializationCallbacks (obj.GetType ());
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seen [obj] = HashHelper.NonNullObject;
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sc.RaiseOnSerializing (obj, context);
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if (sc.HasSerializedCallbacks) {
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// record for later invocation
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callbacks += delegate (StreamingContext ctx)
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{
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sc.RaiseOnSerialized (obj, ctx);
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};
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}
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}
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public void RaiseOnSerializedEvent ()
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{
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if (callbacks != null)
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callbacks (context);
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}
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class HashHelper : IHashCodeProvider, IComparer {
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public static object NonNullObject = new object ();
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public static HashHelper Instance = new HashHelper ();
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private HashHelper ()
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{
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}
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public int GetHashCode (object obj)
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{
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if (obj == null)
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return 0;
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return Object.InternalGetHashCode (obj);
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}
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public int Compare (object x, object y)
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{
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return Object.ReferenceEquals (x, y) ? 0 : 1;
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}
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}
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}
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}
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