/// <summary>
/// Get a single value and attempt to format it
/// </summary>
public string ToString(string format, IFormatProvider formatProvider)
{
object value = Reference.Dereference();
if (value == null)
{
return(string.Empty);
}
if (value is Iterator)
{
var items = (IList <object>)((Iterator)value).GetItem();
if (items.Count != 1)
{
return(string.Empty);
}
value = items[0];
}
if (value is ISource)
{
value = ((ISource)value).GetItem();
}
return(value is IFormattable
? ((IFormattable)value).ToString(format, formatProvider)
: value.ToString());
}
public TupleValue(DataReference reference, int index)
{
var list = reference.Dereference();
Source = list as ISource;
Index = index;
}
public void ThenDerefernceMustResolveTheObject()
{
DataReference dataReference = new DataReference(Context, "testList");
var deref = dataReference.Dereference();
Assert.AreSame(deref, Context["testList"], "The context object was not resolved");
}
/// <summary>
/// Initialise
/// </summary>
/// <param name="refA"></param>
/// <param name="refB"></param>
public CrossJoin(DataReference refA, DataReference refB)
{
var a = refA.Dereference() as IList <object>;
var b = refB.Dereference() as IList <object>;
_list = a.Join(b, p => 1, p => 1, (l, r) => new List <object> {
l, r
}).Cast <object>().ToList();
}
/// <summary>
/// Initialise against a reference
/// </summary>
public ListSequence(DataReference reference)
{
ListItems = reference.Dereference() as IList <object>;
}
/// <summary>
/// Initialise against a reference
/// </summary>
public Switch(DataReference reference, IDictionary <object, object> map) : this(reference.Dereference() as ISource, map)
{
}
/// <summary>
/// Initialise a new instance against a reference
/// </summary>
public When(DataReference reference, Op @operator, object rightHandSide)
: this(reference.Dereference() as ISource, @operator, rightHandSide)
{
}
public PadLeft(DataReference reference, int length, char character)
: this(reference.Dereference() as ISource, length, character)
{
}
/// <summary>
/// Initialise against a reference
/// </summary>
public Substring(DataReference reference, int start, int?length = null)
: this(reference.Dereference() as ISource, start, length)
{
}
