/// <summary>
/// Adds the expression based table input
/// </summary>
/// <remarks>The inputs are "indexed" in the order as added to the table definition builder</remarks>
/// <param name="expression">Expression to be used as table input</param>
/// <param name="inputRef">Reference to added table input that can be used in rule builders</param>
/// <param name="allowedValues">Allowed input values</param>
/// <exception cref="DmnBuilderException">Throws <see cref="DmnBuilderException"/> when the definition has already been built</exception>
/// <exception cref="ArgumentNullException"> when the <paramref name="expression"/> is not provided</exception>
/// <exception cref="ArgumentException"> when the <paramref name="expression"/> is empty or whitespace</exception>
public TableDecision WithInput(string expression, out TableInput.Ref inputRef, params string[] allowedValues)
{
if (IsBuilt)
{
throw Logger.Error <DmnBuilderException>($"Decision is already built");
}
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (string.IsNullOrWhiteSpace(expression))
{
throw new ArgumentException("Missing expression", nameof(expression));
}
var input = new TableInput(Variables, Decisions, InputsInternal.Count).WithExpression(expression);
_ = allowedValues != null && allowedValues.Length > 0
? input.WithAllowedValues(allowedValues)
: input.WithoutAllowedValuesConstraint();
inputRef = input.Reference;
InputsInternal.Add(input);
InputsByRef.Add(inputRef, input);
return(this);
}
/// <summary>
/// Private CTOR - accessible from "owner class" via <see cref="RefCtor"/>
/// </summary>
/// <param name="input">Table input to create the reference for</param>
private Ref(TableInput input)
{
Input = input;
}