/// <summary>
/// Creates a getter on the column. The getter returns the element at
/// cursor.Position.
/// </summary>
public ValueGetter <DType2> GetGetter <DType2>(RowCursor cursor)
{
if (typeof(DType2) == typeof(ReadOnlyMemory <char>))
{
var res = GetGetterReadOnlyMemory(cursor) as ValueGetter <DType2>;
if (res != null)
{
return(res);
}
throw new DataTypeError($"Unable to get a getter for type {typeof(DType2)} from type {typeof(DType)}.");
}
else
{
var _data2 = _data as DType2[];
if (_data2 == null)
{
throw new NotSupportedException(string.Format("Unable to convert into {0}", typeof(DType2)));
}
var missing = DataFrameMissingValue.GetMissingOrDefaultValue(Kind);
return((ref DType2 value) =>
{
value = cursor.Position < (long)Length
? _data2[cursor.Position]
: (DType2)missing;
});
}
}
private ValueGetter<ReadOnlyMemory<char>> GetGetterReadOnlyMemory(IRowCursor cursor)
{
var _data2 = _data as DvText[];
if (_data2 == null)
throw new NotSupportedException(string.Format("Unable to convert into DvText"));
var missing = DataFrameMissingValue.GetMissingOrDefaultValue(Kind);
return (ref ReadOnlyMemory<char> value) =>
{
value = cursor.Position < (long)Length
? _data2[cursor.Position].str
: null;
};
}