diff options
Diffstat (limited to 'mcs/class/System/System.Net/DnsPermission.cs')
| -rw-r--r-- | mcs/class/System/System.Net/DnsPermission.cs | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/mcs/class/System/System.Net/DnsPermission.cs b/mcs/class/System/System.Net/DnsPermission.cs new file mode 100644 index 00000000000..e60a0fca65d --- /dev/null +++ b/mcs/class/System/System.Net/DnsPermission.cs @@ -0,0 +1,139 @@ +//
+// System.Net.DnsPermission.cs
+//
+// Author:
+// Lawrence Pit (loz@cable.a2000.nl)
+//
+
+using System;
+using System.Collections;
+using System.Security;
+using System.Security.Permissions;
+
+namespace System.Net
+{
+ [Serializable]
+ public sealed class DnsPermission : CodeAccessPermission, IUnrestrictedPermission
+ {
+ // Fields
+ bool m_noRestriction;
+
+ // Constructors
+ public DnsPermission (PermissionState state) : base ()
+ {
+ m_noRestriction = (state == PermissionState.Unrestricted);
+ }
+
+ // Methods
+
+ public override IPermission Copy ()
+ {
+ // this is immutable.
+ return this;
+ }
+
+ public override IPermission Intersect (IPermission target)
+ {
+ // LAMESPEC: says to throw an exception when null
+ // but at same time it says to return null. We'll
+ // follow MS behaviour.
+ if (target == null)
+ return null;
+
+ DnsPermission perm = target as DnsPermission;
+
+ if (perm == null)
+ throw new ArgumentException ("Argument not of type DnsPermission");
+
+ if (this.m_noRestriction && perm.m_noRestriction)
+ return this;
+
+ return this.m_noRestriction ? perm : this;
+ }
+
+ public override bool IsSubsetOf (IPermission target)
+ {
+ if (target == null)
+ return !m_noRestriction;
+
+ DnsPermission perm = target as DnsPermission;
+
+ if (perm == null)
+ throw new ArgumentException ("Argument not of type DnsPermission");
+
+ return !this.m_noRestriction || perm.m_noRestriction;
+ }
+
+ public bool IsUnrestricted ()
+ {
+ return this.m_noRestriction;
+ }
+
+ /*
+
+ DnsPermission dns1 = new DnsPermission (PermissionState.None);
+ Console.WriteLine (dns1.ToXml ().ToString ());
+
+ DnsPermission dns2 = new DnsPermission (PermissionState.Unrestricted);
+ Console.WriteLine (dns2.ToXml ().ToString ());
+
+ This is the sample xml output:
+
+ <IPermission class="System.Net.DnsPermission, System, Version=1.0.3300.0, Cultur
+ e=neutral, PublicKeyToken=b77a5c561934e089"
+ version="1"/>
+
+ <IPermission class="System.Net.DnsPermission, System, Version=1.0.3300.0, Cultur
+ e=neutral, PublicKeyToken=b77a5c561934e089"
+ version="1"
+ Unrestricted="true"/>
+ */
+ public override SecurityElement ToXml ()
+ {
+
+ SecurityElement root = new SecurityElement ("IPermission");
+ root.AddAttribute ("class", this.GetType ().AssemblyQualifiedName);
+ root.AddAttribute ("version", "1");
+ if (m_noRestriction)
+ root.AddAttribute ("Unrestricted", "true");
+
+ return root;
+ }
+
+ public override void FromXml (SecurityElement securityElement)
+ {
+ if (securityElement == null)
+ throw new ArgumentNullException ("securityElement");
+
+ // LAMESPEC: it says to throw an ArgumentNullException in this case
+ if (securityElement.Tag != "IPermission")
+ throw new ArgumentException ("securityElement");
+
+ string classStr = securityElement.Attribute ("class");
+ if (classStr == null || !classStr.StartsWith (this.GetType ().FullName + ","))
+ throw new ArgumentException ("securityElement");
+
+ string unrestricted = securityElement.Attribute ("Unrestricted");
+ if (unrestricted != null)
+ this.m_noRestriction = (String.Compare (unrestricted, "true", true) == 0);
+ }
+
+ public override IPermission Union (IPermission target)
+ {
+ // LAMESPEC: according to spec we should throw an
+ // exception when target is null. We'll follow the
+ // behaviour of MS.Net instead of the spec.
+ if (target == null)
+ return this;
+ // throw new ArgumentNullException ("target");
+
+ DnsPermission perm = target as DnsPermission;
+
+ if (perm == null)
+ throw new ArgumentException ("Argument not of type DnsPermission");
+
+ return this.m_noRestriction ? this : perm;
+ }
+
+ }
+}
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