public SpanWeight(SpanQuery query, IndexSearcher searcher)
{
this.m_similarity = searcher.Similarity;
this.m_query = query;
m_termContexts = new Dictionary <Term, TermContext>();
ISet <Term> terms = new JCG.SortedSet <Term>();
query.ExtractTerms(terms);
IndexReaderContext context = searcher.TopReaderContext;
TermStatistics[] termStats = new TermStatistics[terms.Count];
int i = 0;
foreach (Term term in terms)
{
TermContext state = TermContext.Build(context, term);
termStats[i] = searcher.TermStatistics(term, state);
m_termContexts[term] = state;
i++;
}
string field = query.Field;
if (field != null)
{
m_stats = m_similarity.ComputeWeight(query.Boost, searcher.CollectionStatistics(query.Field), termStats);
}
}
public MultiPhraseWeight(MultiPhraseQuery outerInstance, IndexSearcher searcher)
{
this.outerInstance = outerInstance;
this.similarity = searcher.Similarity;
IndexReaderContext context = searcher.TopReaderContext;
// compute idf
var allTermStats = new List <TermStatistics>();
foreach (Term[] terms in outerInstance.termArrays)
{
foreach (Term term in terms)
{
TermContext termContext;
termContexts.TryGetValue(term, out termContext);
if (termContext == null)
{
termContext = TermContext.Build(context, term);
termContexts[term] = termContext;
}
allTermStats.Add(searcher.TermStatistics(term, termContext));
}
}
stats = similarity.ComputeWeight(outerInstance.Boost, searcher.CollectionStatistics(outerInstance.field), allTermStats.ToArray());
}
public PhraseWeight(PhraseQuery outerInstance, IndexSearcher searcher)
{
this.outerInstance = outerInstance;
this.similarity = searcher.Similarity;
IndexReaderContext context = searcher.TopReaderContext;
states = new TermContext[outerInstance.terms.Count];
TermStatistics[] termStats = new TermStatistics[outerInstance.terms.Count];
for (int i = 0; i < outerInstance.terms.Count; i++)
{
Term term = outerInstance.terms[i];
states[i] = TermContext.Build(context, term);
termStats[i] = searcher.TermStatistics(term, states[i]);
}
stats = similarity.ComputeWeight(outerInstance.Boost, searcher.CollectionStatistics(outerInstance.field), termStats);
}