class/corlib/System.Security.Policy/UnionCodeGroup.cs

   1 //
   2 // System.Security.Policy.UnionCodeGroup.cs
   3 //
   4 // Authors
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003 Ximian, Inc (http://www.ximian.com)
   9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Globalization;
  32 using System.Security.Permissions;
  33 using System.Runtime.InteropServices;
  34
  35 namespace System.Security.Policy {
  36
  37         [Serializable]
  38         [ComVisible (true)]
  39         public sealed class UnionCodeGroup : CodeGroup {
  40
  41                 public UnionCodeGroup (IMembershipCondition membershipCondition, PolicyStatement policy)
  42                         : base (membershipCondition, policy)
  43                 {
  44                 }
  45
  46                 // for PolicyLevel (to avoid validation duplication)
  47                 internal UnionCodeGroup (SecurityElement e, PolicyLevel level)
  48                         : base (e, level)
  49                 {
  50                 }
  51
  52                 public override CodeGroup Copy ()
  53                 {
  54                         return Copy (true);
  55                 }
  56
  57                 internal CodeGroup Copy (bool childs)
  58                 {
  59                         UnionCodeGroup copy = new UnionCodeGroup (MembershipCondition, PolicyStatement);
  60                         copy.Name = Name;
  61                         copy.Description = Description;
  62                         if (childs) {
  63                                 foreach (CodeGroup child in Children) {
  64                                         copy.AddChild (child.Copy ());
  65                                 }
  66                         }
  67                         return copy;
  68                 }
  69
  70
  71                 public override PolicyStatement Resolve (Evidence evidence)
  72                 {
  73                         if (evidence == null)
  74                                 throw new ArgumentNullException ("evidence");
  75
  76                         if (!MembershipCondition.Check (evidence))
  77                                 return null;
  78
  79                         PermissionSet ps = this.PolicyStatement.PermissionSet.Copy ();
  80                         if (this.Children.Count > 0) {
  81                                 foreach (CodeGroup child_cg in this.Children) {
  82                                         PolicyStatement child_pst = child_cg.Resolve (evidence);
  83                                         if (child_pst != null) {
  84                                                 ps = ps.Union (child_pst.PermissionSet);
  85                                         }
  86                                 }
  87                         }
  88
  89                         PolicyStatement pst = this.PolicyStatement.Copy ();
  90                         pst.PermissionSet = ps;
  91                         return pst;
  92                 }
  93
  94                 public override CodeGroup ResolveMatchingCodeGroups (Evidence evidence)
  95                 {
  96                         if (evidence == null)
  97                                 throw new ArgumentNullException ("evidence");
  98
  99                         if (!MembershipCondition.Check (evidence))
 100                                 return null;
 101
 102                         // Copy() would add the child (even if they didn't match)
 103                         CodeGroup match = Copy (false);
 104                         if (this.Children.Count > 0) {
 105                                 foreach (CodeGroup cg in this.Children) {
 106                                         CodeGroup child = cg.ResolveMatchingCodeGroups (evidence);
 107                                         if (child != null)
 108                                                 match.AddChild (child);
 109                                 }
 110                         }
 111                         return match;
 112                 }
 113
 114                 public override string MergeLogic {
 115                         get { return "Union"; }
 116                 }
 117         }
 118 }