mcs/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 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
  34 namespace System.Security.Policy {
  35
  36         [Serializable]
  37         public sealed class UnionCodeGroup : CodeGroup {
  38
  39                 public UnionCodeGroup (IMembershipCondition membershipCondition, PolicyStatement policyStatement)
  40                         : base (membershipCondition, policyStatement)
  41                 {
  42                 }
  43
  44                 // for PolicyLevel (to avoid validation duplication)
  45                 internal UnionCodeGroup (SecurityElement e, PolicyLevel level)
  46                         : base (e, level)
  47                 {
  48                 }
  49
  50                 public override CodeGroup Copy ()
  51                 {
  52                         return Copy (true);
  53                 }
  54
  55                 internal CodeGroup Copy (bool childs)
  56                 {
  57                         UnionCodeGroup copy = new UnionCodeGroup (MembershipCondition, PolicyStatement);
  58                         copy.Name = Name;
  59                         copy.Description = Description;
  60                         if (childs) {
  61                                 foreach (CodeGroup child in Children) {
  62                                         copy.AddChild (child.Copy ());
  63                                 }
  64                         }
  65                         return copy;
  66                 }
  67
  68
  69                 public override PolicyStatement Resolve (Evidence evidence)
  70                 {
  71                         if (evidence == null)
  72                                 throw new ArgumentNullException ("evidence");
  73
  74                         if (!MembershipCondition.Check (evidence))
  75                                 return null;
  76
  77                         PolicyStatement pst = this.PolicyStatement.Copy ();
  78
  79                         if (this.Children.Count > 0) {
  80                                 foreach (CodeGroup child_cg in this.Children) {
  81                                         PolicyStatement child_pst = child_cg.Resolve (evidence);
  82                                         if (child_pst != null) {
  83                                                 foreach (IPermission perm in child_pst.PermissionSet) {
  84                                                         pst.PermissionSet.AddPermission (perm);
  85                                                 }
  86                                         }
  87                                 }
  88                         }
  89                         return pst;
  90                 }
  91
  92                 public override CodeGroup ResolveMatchingCodeGroups (Evidence evidence)
  93                 {
  94                         if (evidence == null)
  95                                 throw new ArgumentNullException ("evidence");
  96
  97                         if (!MembershipCondition.Check (evidence))
  98                                 return null;
  99
 100                         // Copy() would add the child (even if they didn't match)
 101                         CodeGroup match = Copy (false);
 102                         if (this.Children.Count > 0) {
 103                                 foreach (CodeGroup cg in this.Children) {
 104                                         CodeGroup child = cg.ResolveMatchingCodeGroups (evidence);
 105                                         if (child != null)
 106                                                 match.AddChild (child);
 107                                 }
 108                         }
 109                         return match;
 110                 }
 111
 112                 public override string MergeLogic {
 113                         get { return "Union"; }
 114                 }
 115         }
 116 }