/// <summary>
/// Recursively load data into the tuple current being loaded.
/// </summary>
/// <param name="handler">The handler constructing the current element.</param>
/// <param name="schema">Schema of tuple being constructed.</param>
/// <param name="row">Data source for tuple to construct.</param>
/// <param name="absIndex">Absolute index into <code>row</code> for the next column to process.</param>
/// <returns>The updated absolute index.</returns>
private int fillTuple(OplDataHandler handler, ITupleSchema schema, IRow row, int absIndex)
{
handler.StartTuple();
for (int i = 0; i < schema.Size; ++i)
{
if (schema.IsTuple(i))
{
ILOG.Opl_Core.Cppimpl.IloTupleSchema s = (ILOG.Opl_Core.Cppimpl.IloTupleSchema)schema;
absIndex = fillTuple(handler, s.getTupleColumn(i), row, absIndex);
continue;
}
if (schema.IsNum(i))
{
SET_FLOAT(handler, row, absIndex);
}
else if (schema.IsInt(i))
{
SET_INT(handler, row, absIndex);
}
else if (schema.IsSymbol(i))
{
SET_STRING(handler, row, absIndex);
}
else
{
throw new NotImplementedException("tuple element type not supported");
}
++absIndex;
}
handler.EndTuple();
return(absIndex);
}
/// <summary>
/// Look for a string field in a tuple and return its value.
/// </summary>
/// <param name="tuple">The tuple to search.</param>
/// <param name="field">The name of the field to find.</param>
/// <param name="def">The value to return if the field is not found or is not of string type.</param>
/// <returns></returns>
private static string tryLoadField(ITuple tuple, String field, string def = null)
{
ITupleSchema schema = tuple.Schema;
int size = schema.Size;
for (int i = 0; i < size; ++i)
{
if (schema.IsSymbol(i) && field.Equals(schema.GetColumnName(i)))
{
return(tuple.GetStringValue(i));
}
}
return(def);
}