public override TermStatistics TermStatistics(Term term, TermContext context)
{
Debug.Assert(term != null);
long docFreq = 0;
long totalTermFreq = 0;
for (int nodeID = 0; nodeID < NodeVersions.Length; nodeID++)
{
TermStatistics subStats;
if (nodeID == MyNodeID)
{
subStats = base.TermStatistics(term, context);
}
else
{
TermAndShardVersion key = new TermAndShardVersion(nodeID, NodeVersions[nodeID], term);
subStats = OuterInstance.TermStatsCache[key];
// We pre-cached during rewrite so all terms
// better be here...
Debug.Assert(subStats != null);
}
long nodeDocFreq = subStats.DocFreq();
if (docFreq >= 0 && nodeDocFreq >= 0)
{
docFreq += nodeDocFreq;
}
else
{
docFreq = -1;
}
long nodeTotalTermFreq = subStats.TotalTermFreq();
if (totalTermFreq >= 0 && nodeTotalTermFreq >= 0)
{
totalTermFreq += nodeTotalTermFreq;
}
else
{
totalTermFreq = -1;
}
}
return new TermStatistics(term.Bytes, docFreq, totalTermFreq);
}
protected internal override void AddClause(BooleanQuery topLevel, Term term, int docFreq, float boost, TermContext states)
{
Query q = new ConstantScoreQuery(new TermQuery(term, states));
q.Boost = boost;
topLevel.Add(q, BooleanClause.Occur.SHOULD);
}
protected internal override void AddClause(BooleanQuery topLevel, Term term, int docCount, float boost, TermContext states)
{
TermQuery tq = new TermQuery(term, states);
tq.Boost = boost;
topLevel.Add(tq, BooleanClause.Occur.SHOULD);
}
/// <summary>
/// Expert: constructs a TermQuery that will use the
/// provided docFreq instead of looking up the docFreq
/// against the searcher.
/// </summary>
public TermQuery(Term t, TermContext states)
{
Debug.Assert(states != null);
_term = t;
DocFreq = states.DocFreq;
PerReaderTermState = states;
}
/// <summary>
/// Expert: constructs a TermQuery that will use the
/// provided docFreq instead of looking up the docFreq
/// against the searcher.
/// </summary>
public TermQuery(Term t, int docFreq)
{
_term = t;
this.DocFreq = docFreq;
PerReaderTermState = null;
}
public TermWeight(TermQuery outerInstance, IndexSearcher searcher, TermContext termStates)
{
this.OuterInstance = outerInstance;
Debug.Assert(termStates != null, "TermContext must not be null");
this.TermStates = termStates;
this.Similarity = searcher.Similarity;
this.Stats = Similarity.ComputeWeight(outerInstance.Boost, searcher.CollectionStatistics(outerInstance._term.Field), searcher.TermStatistics(outerInstance._term, termStates));
}
