public IEnumerable <QueryMatch> Query(Query query, IndexingConventions.ScorerCalc score = null, Sorter sortby = null)
{
query.Initialize(_index, _tx, score ?? new DefaultScorer(_index.Conventions).Score);
return(query.Execute());
}
public IEnumerable<QueryMatch> Query(Query query, IndexingConventions.ScorerCalc score = null, Sorter sortby = null)
{
query.Initialize(_index, _tx, score ?? new DefaultScorer(_index.Conventions).Score);
return query.Execute();
}
public QueryResults QueryTop(Query query, int take,
IndexingConventions.ScorerCalc score = null,
Sorter sortBy = null)
{
if (take < 0)
throw new ArgumentException("Take must be non negative");
var qr = new QueryResults();
var heap = new Heap<QueryMatch>(take, GenerateComparisonFunction(sortBy));
foreach (var match in Query(query, score))
{
heap.Enqueue(match);
qr.TotalResults++;
}
qr.Results = new QueryMatch[heap.Count];
int pos = 0;
while (heap.Count > 0)
{
qr.Results[pos++] = heap.Dequeue();
}
return qr;
}
private Comparison<QueryMatch> GenerateComparisonFunction(Sorter sortBy)
{
if (sortBy == null)
return (x, y) => x.Score.CompareTo(y.Score);
foreach (var sorter in sortBy.Comparers)
{
sorter.Init(this);
}
return (x, y) => sortBy.Comparers.Select(term => term.Compare(x, y))
.FirstOrDefault(ret => ret != 0);
}
