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//------------------------------------------------------------------------------
// <copyright file="OdbcConnectionString.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.Odbc {
using System;
using System.Collections;
using System.Data;
using System.Data.Common;
using System.Security;
using System.Security.Permissions;
using System.Text;
internal sealed class OdbcConnectionString : DbConnectionOptions {
// instances of this class are intended to be immutable, i.e readonly
// used by pooling classes so it is much easier to verify correctness
// when not worried about the class being modified during execution
private static class KEY {
internal const string SaveFile = "savefile";
}
private readonly string _expandedConnectionString;
internal OdbcConnectionString(string connectionString, bool validate) : base(connectionString, null, true) {
if (!validate) {
string filename = null;
int position = 0;
_expandedConnectionString = ExpandDataDirectories(ref filename, ref position);
}
if (validate || (null == _expandedConnectionString)) {
// do not check string length if it was expanded because the final result may be shorter than the original
if ((null != connectionString) && (ODBC32.MAX_CONNECTION_STRING_LENGTH < connectionString.Length)) { // MDAC 83536
throw ODBC.ConnectionStringTooLong();
}
}
}
protected internal override System.Security.PermissionSet CreatePermissionSet() {
System.Security.PermissionSet permissionSet;
if (ContainsKey(KEY.SaveFile)) {
permissionSet = new NamedPermissionSet("FullTrust");
}
else {
permissionSet = new System.Security.PermissionSet(System.Security.Permissions.PermissionState.None);
permissionSet.AddPermission(new OdbcPermission(this));
}
return permissionSet;
}
protected internal override string Expand() {
if (null != _expandedConnectionString) {
return _expandedConnectionString;
}
else {
return base.Expand();
}
}
}
}
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