Fix a few cases of mixed line-endings
[mono.git] / mcs / class / corlib / System.Security.Permissions / GacIdentityPermission.cs
1 //
2 // System.Security.Permissions.GacIdentityPermission.cs
3 //
4 // Author:
5 //      Sebastien Pouliot  <sebastien@ximian.com>
6 //
7 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
8 //
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
16 // 
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
19 // 
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 //
28
29 using System.Globalization;
30 using System.Runtime.InteropServices;
31
32 namespace System.Security.Permissions {
33
34         [ComVisible (true)]
35         [Serializable]
36         public sealed class GacIdentityPermission : CodeAccessPermission, IBuiltInPermission {
37
38                 private const int version = 1;
39
40                 public GacIdentityPermission ()
41                 {
42                 }
43
44                 public GacIdentityPermission (PermissionState state)
45                 {
46                         // false == do not allow Unrestricted for Identity Permissions
47                         CheckPermissionState (state, false);
48                 }
49
50                 public override IPermission Copy ()
51                 {
52                         return (IPermission) new GacIdentityPermission ();
53                 }
54
55                 public override IPermission Intersect (IPermission target)
56                 {
57                         GacIdentityPermission gip = Cast (target);
58                         if (gip == null)
59                                 return null;
60
61                         return Copy ();
62                 }
63
64                 public override bool IsSubsetOf (IPermission target)
65                 {
66                         GacIdentityPermission gip = Cast (target);
67                         return (gip != null);
68                 }
69
70                 public override IPermission Union (IPermission target)
71                 {
72                         Cast (target);
73                         return Copy ();
74                 }
75
76                 public override void FromXml (SecurityElement securityElement)
77                 {
78                         // General validation in CodeAccessPermission
79                         CheckSecurityElement (securityElement, "securityElement", version, version);
80                         // Note: we do not (yet) care about the return value 
81                         // as we only accept version 1 (min/max values)
82                 }
83
84                 public override SecurityElement ToXml ()
85                 {
86                         SecurityElement se = Element (version);
87                         return se;
88                 }
89
90                 // IBuildInPermission
91
92                 int IBuiltInPermission.GetTokenIndex ()
93                 {
94                         return (int) BuiltInToken.GacIdentity;
95                 }
96
97                 // helpers
98
99                 private GacIdentityPermission Cast (IPermission target)
100                 {
101                         if (target == null)
102                                 return null;
103
104                         GacIdentityPermission uip = (target as GacIdentityPermission);
105                         if (uip == null) {
106                                 ThrowInvalidPermission (target, typeof (GacIdentityPermission));
107                         }
108
109                         return uip;
110                 }
111         }
112 }
113