/// <summary>Called the first time next() or skipTo() is called to
/// initialize <c>scorerDocQueue</c>.
/// </summary>
private void InitScorerDocQueue()
{
scorerDocQueue = new ScorerDocQueue(nrScorers);
foreach(Scorer se in subScorers)
{
if (se.NextDoc() != NO_MORE_DOCS)
{
// doc() method will be used in scorerDocQueue.
scorerDocQueue.Insert(se);
}
}
}
