public IEnumerable <TModel> Read()
{
_errors.Clear();
var rowIndex = 0;
var firstRow = RowReader.Read();
if (firstRow == null)
{
if (HasHeader)
{
throw new TableIOException(new[] { new ErrorDetail
{
Type = "NoTableHeader",
Message = "Table header is none."
} });
}
else
{
yield break;
}
}
// decide valid column size.
// ** all row's column size must be valid column size. **
var validColumnSize = ColumnSize ?? firstRow.Count;
if (PropertyMapper.RequiredHeaderOnRead && !HasHeader)
{
throw new TableIOException(new[] { new ErrorDetail
{
Type = "HeaderRequired",
Message = $"Header is required on read.",
RowIndex = rowIndex
} });
}
var propertyMaps = PropertyMapper.CreatePropertyMaps(typeof(TModel), HasHeader ? firstRow.Select(f => $"{f}").ToArray() : null);
var propertyMapMaxColumnIndex = propertyMaps.Any() ? propertyMaps.Max(m => m.ColumnIndex) : -1;
if (propertyMapMaxColumnIndex >= validColumnSize)
{
throw new TableIOException(new[] { new ErrorDetail
{
Type = "OutOfRangeColumnIndexMapping",
Message = $"Max column index({propertyMapMaxColumnIndex}) of property mapping is greater than or equal to valid column size({validColumnSize}).",
RowIndex = rowIndex
} });
}
var row = firstRow;
if (HasHeader)
{
rowIndex++;
row = RowReader.Read();
}
while (row != null)
{
if (row.Count != validColumnSize)
{
_errors.Add(new ErrorDetail
{
Type = "InvalidColumnSize",
Message = "Column size is invalid.",
RowIndex = rowIndex
});
if (_errors.Count >= ErrorLimit)
{
throw new TableIOException(_errors);
}
}
else
{
yield return(ConvertFromRow(row, rowIndex, propertyMaps));
}
rowIndex++;
row = RowReader.Read();
}
if (_errors.Any())
{
throw new TableIOException(_errors);
}
}
