public void Act(CSVRow row, Dictionary <string, string> vars)
{
switch (type)
{
case ExpressionType.Print :
Console.WriteLine(row);
break;
case ExpressionType.Set:
if (fieldValue.Length > 0 &&
fieldValue[0] == '$' &&
vars.ContainsKey(fieldValue.Substring(1)))
{
row.SetEntry(fieldName, vars[fieldValue.Substring(1)]);
}
else
{
row.SetEntry(fieldName, fieldValue);
}
break;
case ExpressionType.Let:
if (!vars.ContainsKey(fieldName))
{
vars.Add(fieldName, "");
}
if (row.Contains(fieldValue))
{
vars[fieldName] = row.GetEntry(fieldValue);
}
else
{
vars[fieldName] = fieldValue;
}
break;
}
if (next != null)
{
next.Act(row, vars);
}
}