/// <summary>
/// Gets multiple readers for each LogData from a <see cref="Witsml141.Log"/> instance.
/// </summary>
/// <param name="log">The log.</param>
/// <returns>An <see cref="IEnumerable{ChannelDataReader}"/>.</returns>
public static IEnumerable <ChannelDataReader> GetReaders(this Witsml141.Log log)
{
if (log?.LogData == null)
{
yield break;
}
_log.DebugFormat("Creating ChannelDataReaders for {0}", log.GetType().FullName);
var isTimeIndex = log.IsTimeLog();
var increasing = log.IsIncreasing();
foreach (var logData in log.LogData)
{
if (logData?.Data == null || !logData.Data.Any())
{
continue;
}
var mnemonics = ChannelDataReader.Split(logData.MnemonicList);
var units = ChannelDataReader.Split(logData.UnitList);
var dataTypes = log.LogCurveInfo.Select(x => x.TypeLogData?.ToString()).ToArray();
var nullValues = log.GetNullValues(mnemonics).ToArray();
// Split index curve from other value curves
var indexCurve = log.LogCurveInfo.GetByMnemonic(log.IndexCurve) ?? new Witsml141.ComponentSchemas.LogCurveInfo
{
Mnemonic = new Witsml141.ComponentSchemas.ShortNameStruct(mnemonics.FirstOrDefault()),
Unit = units.FirstOrDefault()
};
// Skip index curve when passing mnemonics to reader
mnemonics = mnemonics.Skip(1).ToArray();
units = units.Skip(1).ToArray();
dataTypes = dataTypes.Skip(1).ToArray();
nullValues = nullValues.Skip(1).ToArray();
yield return(new ChannelDataReader(logData.Data, mnemonics.Length + 1, mnemonics, units, dataTypes, nullValues, log.GetUri(), dataDelimiter: log.GetDataDelimiterOrDefault())
// Add index curve to separate collection
.WithIndex(indexCurve.Mnemonic.Value, indexCurve.Unit, increasing, isTimeIndex));
}
}
