2 // System.Runtime.Serialization.SurrogateSelector.cs
4 // Author: Duncan Mak (duncan@ximian.com)
5 // Lluis Sanchez (lsg@ctv.es)
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
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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.
34 using System.Collections;
36 namespace System.Runtime.Serialization
39 [System.Runtime.InteropServices.ComVisibleAttribute (true)]
41 public class SurrogateSelector : ISurrogateSelector
44 Hashtable Surrogates = new Hashtable ();
45 ISurrogateSelector nextSelector = null;
48 public SurrogateSelector()
54 public virtual void AddSurrogate (Type type,
55 StreamingContext context, ISerializationSurrogate surrogate)
57 if (type == null || surrogate == null)
58 throw new ArgumentNullException ("Null reference.");
60 string currentKey = type.FullName + "#" + context.ToString ();
62 if (Surrogates.ContainsKey (currentKey))
63 throw new ArgumentException ("A surrogate for " + type.FullName + " already exists.");
65 Surrogates.Add (currentKey, surrogate);
68 public virtual void ChainSelector (ISurrogateSelector selector)
71 throw new ArgumentNullException ("Selector is null.");
73 // Chain the selector at the beggining of the chain
74 // since "The last selector added to the list will be the first one checked"
77 if (nextSelector != null)
78 selector.ChainSelector (nextSelector);
80 nextSelector = selector;
83 public virtual ISurrogateSelector GetNextSelector ()
88 public virtual ISerializationSurrogate GetSurrogate (Type type,
89 StreamingContext context, out ISurrogateSelector selector)
92 throw new ArgumentNullException ("type is null.");
94 // Check this selector, and if the surrogate is not found,
95 // check the chained selectors
97 string key = type.FullName + "#" + context.ToString ();
98 ISerializationSurrogate surrogate = (ISerializationSurrogate) Surrogates [key];
100 if (surrogate != null) {
105 if (nextSelector != null)
106 return nextSelector.GetSurrogate (type, context, out selector);
113 public virtual void RemoveSurrogate (Type type, StreamingContext context)
116 throw new ArgumentNullException ("type is null.");
118 string key = type.FullName + "#" + context.ToString ();
119 Surrogates.Remove (key);