// next without initial increment
private bool DoNext()
{
while (more)
{
while (more && first.doc < last.doc)
{
// find doc w/ all the terms
more = first.SkipTo(last.doc); // skip first upto last
FirstToLast(); // and move it to the end
}
if (more)
{
// found a doc with all of the terms
freq = PhraseFreq(); // check for phrase
if (freq == 0.0f)
{
// no match
more = last.Next();
}
// trigger further scanning
else
{
return(true); // found a match
}
}
}
return(false); // no more matches
}
public override int Advance(int target)
{
firstTime = false;
for (PhrasePositions pp = first; more && pp != null; pp = pp.next)
{
more = pp.SkipTo(target);
}
if (more)
{
Sort(); // re-sort
}
if (!DoNext())
{
first.doc = NO_MORE_DOCS;
}
return(first.doc);
}