/// <summary>
/// creates an expression numeric operand
/// </summary>
/// <param name="text">text</param>
/// <param name="cast">cast, None if doesnt apply</param>
public NumberOperand(string text, DbColumnType cast)
: base(text, cast)
{
if ((valueType = text.ToNumberType()) == null)
{
throw new ArgumentException($"Invalid number operand: {text}");
}
if (cast != DbColumnType.None && !cast.IsNumeric())
{
throw new ArgumentException($"Invalid numeric cast: {cast}");
}
}
/// <summary>
/// creates an expression column operand
/// </summary>
/// <param name="column">column</param>
/// <param name="cast">cast, None if doesnt apply</param>
public ColumnOperand(Column column, DbColumnType cast = DbColumnType.None)
: base(column == null ? String.Empty : column.Identifier(), cast)
{
if ((Column = column) == null)
{
throw new ArgumentException($"Column operand null or empty");
}
Type = Enum.Parse <DbColumnType>(Column.Meta.Type);
if (cast != DbColumnType.None)
{
if ((Type.IsNumeric() && !cast.IsNumeric()))
{
throw new ArgumentException($"cast types: {Type} and {cast} doesnot match");
}
}
}