mcs/class/corlib/System.Security.Policy/PolicyStatement.cs

   1 //\r
   2 // System.Security.Policy.PolicyStatement\r
   3 //\r
   4 // Author:\r
   5 //   Dan Lewis (dihlewis@yahoo.co.uk)\r
   6 //\r
   7 // (C) 2002\r
   8 //\r
   9 \r
  10 using System.Security.Permissions;\r
  11 \r
  12 namespace System.Security.Policy {\r
  13 \r
  14         [Serializable]\r
  15         public sealed class PolicyStatement : ISecurityEncodable, ISecurityPolicyEncodable {\r
  16                 public PolicyStatement (PermissionSet perms) :\r
  17                         this (perms, PolicyStatementAttribute.Nothing)\r
  18                 {\r
  19                 }\r
  20 \r
  21                 public PolicyStatement (PermissionSet perms, PolicyStatementAttribute attrs) {\r
  22                         this.perms = perms;\r
  23                         this.attrs = attrs;\r
  24                 }\r
  25                 \r
  26                 public PermissionSet PermissionSet {\r
  27                         get { return perms; }\r
  28                         set { perms = value; }\r
  29                 }\r
  30                 \r
  31                 public PolicyStatementAttribute Attributes {\r
  32                         get { return attrs; }\r
  33                         set { attrs = value; }\r
  34                 }\r
  35 \r
  36                 public string AttributeString {\r
  37                         get { return attrs.ToString ("F"); }\r
  38                 }\r
  39 \r
  40                 public PolicyStatement Copy ()\r
  41                 {\r
  42                         return new PolicyStatement (perms, attrs);\r
  43                 }\r
  44 \r
  45                 // ISecurityEncodable\r
  46 \r
  47                 public void FromXml (SecurityElement e)\r
  48                 {\r
  49                         FromXml (e, null);\r
  50                 }\r
  51 \r
  52                 public void FromXml (SecurityElement e, PolicyLevel level)\r
  53                 {\r
  54                         SecurityElement permissions = e.SearchForChildByTag ("PermissionSet");\r
  55 \r
  56                         string attributes = e.Attribute ("Attributes");\r
  57 \r
  58                         if (attributes != null)\r
  59                                 attrs = (PolicyStatementAttribute) Enum.Parse (\r
  60                                         typeof (PolicyStatementAttribute), attributes);\r
  61                                 \r
  62                         perms = new PermissionSet (PermissionState.None);\r
  63                         perms.FromXml (permissions);\r
  64                 }\r
  65                 \r
  66                 public SecurityElement ToXml ()\r
  67                 {\r
  68                         return ToXml (null);\r
  69                 }\r
  70 \r
  71                 public SecurityElement ToXml (PolicyLevel level)\r
  72                 {\r
  73                         SecurityElement element = new SecurityElement ("PolicyStatement");\r
  74                         element.AddAttribute ("version", "1");\r
  75 \r
  76                         if (attrs != PolicyStatementAttribute.Nothing)\r
  77                                 element.AddAttribute ("Attributes", attrs.ToString ());\r
  78                         \r
  79                         element.AddChild (perms.ToXml ());\r
  80 \r
  81                         return element;\r
  82                 }\r
  83 \r
  84                 private PermissionSet perms;\r
  85                 private PolicyStatementAttribute attrs;\r
  86         }\r
  87 }\r