private static IColumn CloneColumnCore <T>(IColumn column)
{
Contracts.Assert(column is IColumn <T>);
IRow meta = column.Metadata;
if (meta != null)
{
meta = RowCursorUtils.CloneRow(meta);
}
var tcolumn = (IColumn <T>)column;
if (!tcolumn.IsActive)
{
return(new InactiveImpl <T>(tcolumn.Name, meta, tcolumn.Type));
}
T val = default(T);
tcolumn.GetGetter()(ref val);
return(GetColumn(tcolumn.Name, tcolumn.Type, ref val, meta));
}