internal EduHubDataSetDeltaReader(EduHubDataSet <T> DataSet)
{
if (DataSet == null)
{
throw new ArgumentNullException(nameof(DataSet));
}
DataSet.EnsureDeltaAvailable();
dataSet = DataSet;
context = DataSet.Context;
// Copy to memory stream (don't directly process eduHub files)
var stream = new MemoryStream();
using (var fileStream = new FileStream(dataSet.Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
fileStream.CopyTo(stream);
stream.Position = 0;
// Initialize Csv Reader
reader = new CsvReader(stream);
// Load delta entities
deltaEntities = dataSet.LoadDelta().ToList();
}
internal EduHubDataSetReader(EduHubDataSet <T> DataSet, string Filename)
{
if (DataSet == null)
{
throw new ArgumentNullException(nameof(DataSet));
}
if (Filename == null)
{
throw new ArgumentNullException(nameof(Filename));
}
if (!File.Exists(Filename))
{
throw new FileNotFoundException("eduHub data set not found", Filename);
}
dataSet = DataSet;
context = DataSet.Context;
// Copy to memory stream (don't directly process eduHub files)
var stream = new MemoryStream();
using (var fileStream = new FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
fileStream.CopyTo(stream);
stream.Position = 0;
// Initialize Csv Reader
reader = new CsvReader(stream);
}
internal EduHubDataSetLoadedReader(EduHubDataSet <T> DataSet, List <T> Items)
{
if (DataSet == null)
{
throw new ArgumentNullException(nameof(DataSet));
}
dataSet = DataSet;
context = DataSet.Context;
items = Items;
index = -1;
entityLastModifiedMax = new Lazy <DateTime?>(CalculateEntityLastModifiedMax);
}
internal EduHubDataSetReader(EduHubDataSet <T> DataSet)
: this(DataSet, DataSet.Filename)
{
}
