private bool FindIndexKey(Stream AKey, object ACompareContext, out IndexNode AIndexNode, out int AEntryNumber)
{
SearchPath LSearchPath = new SearchPath();
try
{
bool LResult = FAccessPath.FindKey(FProcess, AKey, ACompareContext, LSearchPath, out AEntryNumber);
AIndexNode = LSearchPath.DisownAt(LSearchPath.Count - 1);
return(LResult);
}
finally
{
LSearchPath.Dispose();
}
}
/// <summary>Updates the entry given by AOldKey to the entry given by ANewKey and ANewData. If AOldKey == ANewKey, the data for the entry is updated in place, otherwise it is moved to the location given by ANewKey.</summary>
public void Update(ServerProcess AProcess, Stream AOldKey, Stream ANewKey, Stream ANewData)
{
int LEntryNumber;
using (SearchPath LSearchPath = new SearchPath())
{
bool LResult = FindKey(AProcess, AOldKey, null, LSearchPath, out LEntryNumber);
if (!LResult)
{
throw new IndexException(IndexException.Codes.KeyNotFound);
}
if (Compare(AProcess, AOldKey, null, ANewKey, null) == 0)
{
if (ANewData != null)
{
LSearchPath.DataNode.Update(ANewData, LEntryNumber);
}
}
else
{
if (ANewData == null)
{
ANewData = new MemoryStream(DataLength);
ANewData.SetLength(DataLength);
CopyData(AProcess, LSearchPath.DataNode.Data(LEntryNumber), ANewData);
}
InternalDelete(AProcess, LSearchPath, LEntryNumber);
LSearchPath.Dispose();
LResult = FindKey(AProcess, ANewKey, null, LSearchPath, out LEntryNumber);
if (LResult)
{
throw new IndexException(IndexException.Codes.DuplicateKey);
}
InternalInsert(AProcess, LSearchPath, LEntryNumber, ANewKey, ANewData);
}
}
}
