public override float NextSingle()
{
if (!HasNext())
{
throw new IndexOutOfRangeException("No more facets in this iteration");
}
SingleIteratorNode node = m_queue.Top;
m_facet = node.CurFacet;
float next = TermSingleList.VALUE_MISSING;
m_count = 0;
while (HasNext())
{
node = m_queue.Top;
next = node.CurFacet;
if ((next != TermSingleList.VALUE_MISSING) && (next != m_facet))
{
return(m_facet);
}
m_count += node.CurFacetCount;
if (node.Fetch(1))
{
m_queue.UpdateTop();
}
else
{
m_queue.Pop();
}
}
return(TermSingleList.VALUE_MISSING);
}
/// <summary>
/// This version of the next() method applies the minHits from the facet spec
/// before returning the facet and its hitcount
/// </summary>
/// <param name="minHits">the minHits from the facet spec for CombinedFacetAccessible</param>
/// <returns>The next facet that obeys the minHits</returns>
public override string Next(int minHits)
{
int qsize = m_queue.Count;
if (qsize == 0)
{
m_facet = TermSingleList.VALUE_MISSING;
m_count = 0;
return(null);
}
SingleIteratorNode node = m_queue.Top;
m_facet = node.CurFacet;
m_count = node.CurFacetCount;
while (true)
{
if (node.Fetch(minHits))
{
node = m_queue.UpdateTop();
}
else
{
m_queue.Pop();
if (--qsize > 0)
{
node = m_queue.Top;
}
else
{
// we reached the end. check if this facet obeys the minHits
if (m_count < minHits)
{
m_facet = TermSingleList.VALUE_MISSING;
m_count = 0;
return(null);
}
break;
}
}
float next = node.CurFacet;
if (next != m_facet)
{
// check if this facet obeys the minHits
if (m_count >= minHits)
{
break;
}
// else, continue iterating to the next facet
m_facet = next;
m_count = node.CurFacetCount;
}
else
{
m_count += node.CurFacetCount;
}
}
return(Format(m_facet));
}
public CombinedSingleFacetIterator(IList <SingleFacetIterator> iterators, int minHits)
: this(iterators.Count)
{
m_iterators = iterators;
foreach (SingleFacetIterator iterator in iterators)
{
SingleIteratorNode node = new SingleIteratorNode(iterator);
if (node.Fetch(minHits))
{
m_queue.Add(node);
}
}
m_facet = TermSingleList.VALUE_MISSING;
m_count = 0;
}