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AttributeMetaData.cs
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AttributeMetaData.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace System.DirectoryServices.ActiveDirectory
{
public class AttributeMetadata
{
private readonly string? _pszLastOriginatingDsaDN;
private string? _originatingServerName;
private readonly DirectoryServer _server;
private readonly Hashtable _nameTable;
private readonly bool _advanced;
internal AttributeMetadata(IntPtr info, bool advanced, DirectoryServer server, Hashtable table)
{
if (advanced)
{
DS_REPL_ATTR_META_DATA_2 attrMetaData = new DS_REPL_ATTR_META_DATA_2();
Marshal.PtrToStructure(info, attrMetaData);
Debug.Assert(attrMetaData != null);
Name = Marshal.PtrToStringUni(attrMetaData.pszAttributeName)!;
Version = attrMetaData.dwVersion;
long ftimeChangeValue = (long)((uint)attrMetaData.ftimeLastOriginatingChange1 + (((long)attrMetaData.ftimeLastOriginatingChange2) << 32));
LastOriginatingChangeTime = DateTime.FromFileTime(ftimeChangeValue);
LastOriginatingInvocationId = attrMetaData.uuidLastOriginatingDsaInvocationID;
OriginatingChangeUsn = attrMetaData.usnOriginatingChange;
LocalChangeUsn = attrMetaData.usnLocalChange;
_pszLastOriginatingDsaDN = Marshal.PtrToStringUni(attrMetaData.pszLastOriginatingDsaDN);
}
else
{
DS_REPL_ATTR_META_DATA attrMetaData = new DS_REPL_ATTR_META_DATA();
Marshal.PtrToStructure(info, attrMetaData);
Debug.Assert(attrMetaData != null);
Name = Marshal.PtrToStringUni(attrMetaData.pszAttributeName)!;
Version = attrMetaData.dwVersion;
long ftimeChangeValue = (long)((uint)attrMetaData.ftimeLastOriginatingChange1 + (((long)attrMetaData.ftimeLastOriginatingChange2) << 32));
LastOriginatingChangeTime = DateTime.FromFileTime(ftimeChangeValue);
LastOriginatingInvocationId = attrMetaData.uuidLastOriginatingDsaInvocationID;
OriginatingChangeUsn = attrMetaData.usnOriginatingChange;
LocalChangeUsn = attrMetaData.usnLocalChange;
}
_server = server;
_nameTable = table;
_advanced = advanced;
}
public string Name { get; }
public int Version { get; }
public DateTime LastOriginatingChangeTime { get; }
public Guid LastOriginatingInvocationId { get; }
public long OriginatingChangeUsn { get; }
public long LocalChangeUsn { get; }
public string? OriginatingServer
{
get
{
if (_originatingServerName == null)
{
// check whether we have got it before
if (_nameTable.Contains(LastOriginatingInvocationId))
{
_originatingServerName = (string)_nameTable[LastOriginatingInvocationId]!;
}
// do the translation for downlevel platform or kcc is able to do the name translation
else if (!_advanced || (_advanced && _pszLastOriginatingDsaDN != null))
{
_originatingServerName = Utils.GetServerNameFromInvocationID(_pszLastOriginatingDsaDN, LastOriginatingInvocationId, _server);
// add it to the hashtable
_nameTable.Add(LastOriginatingInvocationId, _originatingServerName);
}
}
return _originatingServerName;
}
}
}
}