//******************************************************************************************************//  RestrictAccessAttribute.cs - Gbtc////  Copyright © 2012, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may//  not use this file except in compliance with the License. You may obtain a copy of the License at:////      http://www.opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  01/06/2011 - Pinal C. Patel//       Generated original version of source code.//  12/20/2012 - Starlynn Danyelle Gilliam//       Modified Header.////****************************************************************************************************** using System;using System.Threading; namespace GSF.Security{    /// <summary>    /// Represents an <see cref="Attribute"/> that can be used restrict access to a class when using role-based security.    /// </summary>    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]    public class RestrictAccessAttribute : Attribute    {        #region [ Members ]         // Fields        private string[] m_roles;         #endregion         #region [ Constructors ]         /// <summary>        /// Initializes a new instance of the <see cref="RestrictAccessAttribute"/> class.        /// </summary>        public RestrictAccessAttribute()            : this(null)        {        }         /// <summary>        /// Initializes a new instance of the <see cref="RestrictAccessAttribute"/> class.        /// </summary>        /// <param name="roles">List of either roles the current thread principal must have in order to have access.</param>        public RestrictAccessAttribute(params string[] roles)        {            m_roles = roles;        }         #endregion                 #region [ Properties ]         /// <summary>        /// Gets or sets the list of either roles the current thread principal must have in order to have access.        /// </summary>        public string[] Roles        {            get            {                return m_roles;            }            set            {                m_roles = value;            }        }         #endregion         #region [ Methods ]         /// <summary>        /// Checks if the current thread principal has at least one of the <see cref="Roles"/> in order to have access.        /// </summary>        /// <returns>true if the current thread principal has access, otherwise false.</returns>        public bool CheckAccess()        {            if (m_roles != null)            {                // One or more roles have been specified.                foreach (string role in m_roles)                {                    // Check role against principal's role membership.                    if (Thread.CurrentPrincipal.IsInRole(role))                        // Principal has membership to the role so allow access.                        return true;                }            }             return false;        }         #endregion    }}