public override void CustomRead()
{
OplDataHandler handler = DataHandler;
// Get the element of the predefined name.
// If no such element is defined then exit early.
// The element must be either a tuple or a set of tuples.
// Any custom load specification specified by the element is then processed.
OplElement spec = handler.getElement(ELEM_NAME);
if (spec == null)
{
return;
}
if (spec.ElementType == OplElementType.Type.TUPLE)
{
loadSpec(handler, spec.AsTuple());
}
else if (spec.ElementType == OplElementType.Type.SET_TUPLE)
{
foreach (ITuple tuple in spec.AsTupleSet())
{
loadSpec(handler, tuple);
}
}
else
{
throw new NotImplementedException(ELEM_NAME + " must be (set of) tuple");
}
}
/// <summary>
/// Load an element that is a plain tuple.
/// </summary>
private void loadTuple(OplDataHandler handler, string name, IEnumerator <IRow> rows)
{
OplElement elem = handler.getElement(name);
ITuple tuple = elem.AsTuple();
handler.StartElement(name);
rows.MoveNext();
fillTuple(handler, tuple.Schema, rows.Current, 0);
handler.EndElement();
}