//------------------------------------------------------------------------------
// <copyright file="OleDbPermission.cs" company="Microsoft">
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
 
namespace System.Data.OleDb {
 
    using System.Collections;
    using System.Collections.Generic;
    using System.Data.Common;
    using System.Globalization;
    using System.Runtime.Serialization;
    using System.Security;
    using System.Security.Permissions;
 
    [Serializable] 
    public sealed class OleDbPermission :  DBDataPermission {
 
        private String[] _providerRestriction; // should never be string[0]
        private String _providers;
 
        [ Obsolete("OleDbPermission() has been deprecated.  Use the OleDbPermission(PermissionState.None) constructor.  http://go.microsoft.com/fwlink/?linkid=14202", true) ] // MDAC 86034
        public OleDbPermission() : this(PermissionState.None) {
        }
 
        public OleDbPermission(PermissionState state) : base(state) {
        }
 
        [ Obsolete("OleDbPermission(PermissionState state, Boolean allowBlankPassword) has been deprecated.  Use the OleDbPermission(PermissionState.None) constructor.  http://go.microsoft.com/fwlink/?linkid=14202", true) ] // MDAC 86034
        public OleDbPermission(PermissionState state, bool allowBlankPassword) : this(state) {
            AllowBlankPassword = allowBlankPassword;
        }
 
        private OleDbPermission(OleDbPermission permission) : base(permission) { // for Copy
        }
 
        internal OleDbPermission(OleDbPermissionAttribute permissionAttribute) : base(permissionAttribute) { // for CreatePermission
        }
 
        internal OleDbPermission(OleDbConnectionString constr) : base(constr) { // for Open
            if ((null == constr) || constr.IsEmpty) {
                base.Add(ADP.StrEmpty, ADP.StrEmpty, KeyRestrictionBehavior.AllowOnly);
            }
        }
 
        [System.ComponentModel.Browsable(false)]
        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
        [Obsolete("Provider property has been deprecated.  Use the Add method.  http://go.microsoft.com/fwlink/?linkid=14202")]
        public string Provider {
            get {
                string providers = _providers; // MDAC 83103
                if (null == providers) {
                    string[] restrictions = _providerRestriction;
                    if (null != restrictions) {
                        if (0 < restrictions.Length) {
                            providers = restrictions[0];
                            for (int i = 1; i < restrictions.Length; ++i) {
                                providers += ";" + restrictions[i];
                            }
                        }
                    }
                }
                return ((null != providers) ? providers : ADP.StrEmpty);
            }
            set { // MDAC 61263
                string[] restrictions = null;
                if (!ADP.IsEmpty(value)) {
                    restrictions = value.Split(new char[1] { ';' });
                    restrictions = DBConnectionString.RemoveDuplicates(restrictions);
                }
                _providerRestriction = restrictions;
                _providers = value;
            }
        }
 
        override public IPermission Copy () {
            return new OleDbPermission(this);
        }
    }
 
    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Assembly, AllowMultiple = true, Inherited = false )]
    [Serializable] 
    public sealed class OleDbPermissionAttribute : DBDataPermissionAttribute {
 
        private String _providers;
 
        public OleDbPermissionAttribute(SecurityAction action) : base(action) {
        }
 
        [System.ComponentModel.Browsable(false)]
        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
        [Obsolete("Provider property has been deprecated.  Use the Add method.  http://go.microsoft.com/fwlink/?linkid=14202")]
        public String Provider {
            get {
                string providers = _providers;
                return ((null != providers) ? providers : ADP.StrEmpty);
            }
            set {
                _providers = value;
            }
        }
 
        override public IPermission CreatePermission() {
            return new OleDbPermission(this);
        }
    }
}