//------------------------------------------------------------------------------
// <copyright file="DBDataPermissionAttribute.cs" company="Microsoft">
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>
// <owner current="true" primary="false">[....]</owner>
//------------------------------------------------------------------------------

namespace System.Data.Common {

    using System.ComponentModel;
    using System.Data.Common;
    using System.Diagnostics;
    using System.Security;
    using System.Security.Permissions;

    /* derived class pattern
    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Assembly, AllowMultiple = true, Inherited = false )]
    [Serializable] sealed public class XPermissionAttribute : DBDataPermissionAttribute {
        public XPermissionAttribute(SecurityAction action) : base(action) {
        }
        override public IPermission CreatePermission() {
            return new XPermission(this);
        }
    }
    */

    [Serializable(), AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Assembly, AllowMultiple = true, Inherited = false )]
    public abstract class DBDataPermissionAttribute : CodeAccessSecurityAttribute { // V1.0.3300
        private bool _allowBlankPassword;// = false;
        private string _connectionString;// = ADP.StrEmpty;
        private string _restrictions;// = ADP.StrEmpty;
        private KeyRestrictionBehavior _behavior;// = KeyRestrictionBehavior.AllowOnly;

        protected DBDataPermissionAttribute(SecurityAction action) : base(action) {
        }

        public bool AllowBlankPassword { // V1.0.3300
            get {
                return _allowBlankPassword;
            }
            set {
                _allowBlankPassword = value;
            }
        }

        public string ConnectionString { // V1.0.5000
            get {
                string value = _connectionString;
                return ((null != value) ? value : String.Empty);
            }
            set {
                _connectionString = value;
            }
        }

        public KeyRestrictionBehavior KeyRestrictionBehavior { // V1.0.5000, default AllowOnly
            get {
                return _behavior;
            }
            set {
                switch(value) {
                case KeyRestrictionBehavior.PreventUsage:
                case KeyRestrictionBehavior.AllowOnly:
                    _behavior = value;
                    break;
                default:
                    throw ADP.InvalidKeyRestrictionBehavior(value);
                }
            }
        }

        public string KeyRestrictions { // V1.0.5000
            get {
                string value = _restrictions;
                return (null != value) ? value : ADP.StrEmpty;
            }
            set {
                _restrictions = value;
            }
        }

        [ EditorBrowsableAttribute(EditorBrowsableState.Never) ]
        public bool ShouldSerializeConnectionString() { // V1.2.3300
            return (null != _connectionString);
        }

        [ EditorBrowsableAttribute(EditorBrowsableState.Never) ]
        public bool ShouldSerializeKeyRestrictions() { // V1.2.3300
            return (null != _restrictions);
        }
    }
}