/// <summary>
/// Initializes a new instance of the <see cref="StateRecord"/> class.
/// </summary>
/// <param name="historianID">Historian identifier of <see cref="StateRecord"/>.</param>
public StateRecord(int historianID)
{
m_historianID = historianID;
m_archivedData = new StateRecordDataPoint(m_historianID);
m_previousData = new StateRecordDataPoint(m_historianID);
m_currentData = new StateRecordDataPoint(m_historianID);
m_activeDataBlockIndex = -1;
m_activeDataBlockSlot = 1;
}
/// <summary>
/// Initializes <see cref="StateRecordSummary"/> from the specified <paramref name="buffer"/>.
/// </summary>
/// <param name="buffer">Binary image to be used for initializing <see cref="StateRecordSummary"/>.</param>
/// <param name="startIndex">0-based starting index of initialization data in the <paramref name="buffer"/>.</param>
/// <param name="length">Valid number of bytes in <paramref name="buffer"/> from <paramref name="startIndex"/>.</param>
/// <returns>Number of bytes used from the <paramref name="buffer"/> for initializing <see cref="StateRecordSummary"/>.</returns>
public int ParseBinaryImage(byte[] buffer, int startIndex, int length)
{
if (length >= FixedLength)
{
// Binary image has sufficient data.
HistorianID = LittleEndian.ToInt32(buffer, startIndex);
CurrentData = new StateRecordDataPoint(HistorianID, buffer, startIndex + 4, length - 4);
return(FixedLength);
}
else
{
// Binary image does not have sufficient data.
return(0);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="StateRecord"/> class.
/// </summary>
/// <param name="historianID">Historian identifier of <see cref="StateRecord"/>.</param>
public StateRecord(int historianID)
{
m_historianID = historianID;
m_archivedData = new StateRecordDataPoint(m_historianID);
m_previousData = new StateRecordDataPoint(m_historianID);
m_currentData = new StateRecordDataPoint(m_historianID);
m_activeDataBlockIndex = -1;
m_activeDataBlockSlot = 1;
}
/// <summary>
/// Initializes <see cref="StateRecordSummary"/> from the specified <paramref name="buffer"/>.
/// </summary>
/// <param name="buffer">Binary image to be used for initializing <see cref="StateRecordSummary"/>.</param>
/// <param name="startIndex">0-based starting index of initialization data in the <paramref name="buffer"/>.</param>
/// <param name="length">Valid number of bytes in <paramref name="buffer"/> from <paramref name="startIndex"/>.</param>
/// <returns>Number of bytes used from the <paramref name="buffer"/> for initializing <see cref="StateRecordSummary"/>.</returns>
public int ParseBinaryImage(byte[] buffer, int startIndex, int length)
{
if (length >= FixedLength)
{
// Binary image has sufficient data.
HistorianID = LittleEndian.ToInt32(buffer, startIndex);
CurrentData = new StateRecordDataPoint(HistorianID, buffer, startIndex + 4, length - 4);
return FixedLength;
}
else
{
// Binary image does not have sufficient data.
return 0;
}
}
private StateRecord ReadStateDataRecord(int historianID)
{
StateRecord record = new StateRecord(historianID);
// TODO: Just doing this to get latest value until API supports this
IEnumerable<IDataPoint> dataPoints;
Ticks stopTime = DateTime.UtcNow.Ticks;
Ticks startTime = stopTime - Ticks.PerSecond * 2;
dataPoints = ReadDataStream(m_clientDatabase.Read((ulong)(long)startTime, (ulong)(long)stopTime, new[] { (ulong)historianID }));
StateRecordDataPoint dataPoint = new StateRecordDataPoint(dataPoints.Last());
record.CurrentData = dataPoint;
record.PreviousData = dataPoint;
record.ArchivedData = dataPoint;
return record;
}
