Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / security / system / security / permissions / storepermission.cs / 1305376 / storepermission.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // StorePermission.cs // namespace System.Security.Permissions { using System.Globalization; [Serializable()] public sealed class StorePermission : CodeAccessPermission, IUnrestrictedPermission { private StorePermissionFlags m_flags; public StorePermission (PermissionState state) { if (state == PermissionState.Unrestricted) m_flags = StorePermissionFlags.AllFlags; else if (state == PermissionState.None) m_flags = StorePermissionFlags.NoFlags; else throw new ArgumentException(SR.GetString(SR.Argument_InvalidPermissionState)); } public StorePermission (StorePermissionFlags flag) { VerifyFlags(flag); m_flags = flag; } public StorePermissionFlags Flags { set { VerifyFlags(value); m_flags = value; } get { return m_flags; } } // // IUnrestrictedPermission implementation // public bool IsUnrestricted () { return m_flags == StorePermissionFlags.AllFlags; } // // IPermission implementation // public override IPermission Union (IPermission target) { if (target == null) return this.Copy(); try { StorePermission operand = (StorePermission) target; StorePermissionFlags flag_union = m_flags | operand.m_flags; if (flag_union == StorePermissionFlags.NoFlags) return null; else return new StorePermission(flag_union); } catch (InvalidCastException) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Argument_WrongType), this.GetType().FullName)); } } public override bool IsSubsetOf (IPermission target) { if (target == null) return m_flags == StorePermissionFlags.NoFlags; try { StorePermission operand = (StorePermission) target; StorePermissionFlags sourceFlag = this.m_flags; StorePermissionFlags targetFlag = operand.m_flags; return ((sourceFlag & targetFlag) == sourceFlag); } catch (InvalidCastException) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Argument_WrongType), this.GetType().FullName)); } } public override IPermission Intersect (IPermission target) { if (target == null) return null; try { StorePermission operand = (StorePermission) target; StorePermissionFlags flag_intersect = operand.m_flags & this.m_flags; if (flag_intersect == StorePermissionFlags.NoFlags) return null; else return new StorePermission(flag_intersect); } catch (InvalidCastException) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Argument_WrongType), this.GetType().FullName)); } } public override IPermission Copy () { return new StorePermission((StorePermissionFlags)m_flags); } public override SecurityElement ToXml () { SecurityElement securityElement = new SecurityElement("IPermission"); securityElement.AddAttribute("class", this.GetType().FullName + ", " + this.GetType().Module.Assembly.FullName.Replace('\"', '\'')); securityElement.AddAttribute("version", "1"); if (!IsUnrestricted()) securityElement.AddAttribute("Flags", m_flags.ToString()); else securityElement.AddAttribute("Unrestricted", "true"); return securityElement; } public override void FromXml (SecurityElement securityElement) { if (securityElement == null) throw new ArgumentNullException("securityElement"); string className = securityElement.Attribute("class"); if (className == null || className.IndexOf(this.GetType().FullName, StringComparison.Ordinal) == -1) throw new ArgumentException(SR.GetString(SR.Argument_InvalidClassAttribute), "securityElement"); string unrestricted = securityElement.Attribute("Unrestricted"); if (unrestricted != null && String.Compare(unrestricted, "true", StringComparison.OrdinalIgnoreCase) == 0) { m_flags = StorePermissionFlags.AllFlags; return; } m_flags = StorePermissionFlags.NoFlags; String strFlags = securityElement.Attribute("Flags"); if (strFlags != null) { StorePermissionFlags flags = (StorePermissionFlags) Enum.Parse(typeof(StorePermissionFlags), strFlags); VerifyFlags(flags); m_flags = flags; } } internal static void VerifyFlags (StorePermissionFlags flags) { if ((flags & ~StorePermissionFlags.AllFlags) != 0) throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Arg_EnumIllegalVal), (int)flags)); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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