/// <summary> A search implementation allowing sorting which spans a new thread for each
/// Searchable, waits for each search to complete and merges
/// the results back together.
/// </summary>
public override TopFieldDocs Search(Weight weight, Filter filter, int nDocs, Sort sort)
{
if (sort == null) throw new ArgumentNullException("sort");
FieldDocSortedHitQueue hq = new FieldDocSortedHitQueue(nDocs);
object lockObj = new object();
Task<TopFieldDocs>[] tasks = new Task<TopFieldDocs>[searchables.Length];
for (int i = 0; i < searchables.Length; i++) // search each searchable
{
int cur = i;
tasks[i] =
Task<TopFieldDocs>.Factory.StartNew(
() => MultiSearcherCallableWithSort(ThreadLock.MonitorLock, lockObj, searchables[cur], weight, filter, nDocs, hq, sort, cur,
starts));
}
int totalHits = 0;
float maxScore = float.NegativeInfinity;
Task.WaitAll(tasks);
foreach (TopFieldDocs topFieldDocs in tasks.Select(x => x.Result))
{
totalHits += topFieldDocs.TotalHits;
maxScore = Math.Max(maxScore, topFieldDocs.MaxScore);
}
ScoreDoc[] scoreDocs = new ScoreDoc[hq.Size()];
for (int i = hq.Size() - 1; i >= 0; i--)
scoreDocs[i] = hq.Pop();
return new TopFieldDocs(totalHits, scoreDocs, hq.GetFields(), maxScore);
}
public override TopFieldDocs Search(Weight weight, Filter filter, int n, Sort sort)
{
var hq = new FieldDocSortedHitQueue(n);
int totalHits = 0;
float maxScore = System.Single.NegativeInfinity;
var lockObj = new object();
for (int i = 0; i < searchables.Length; i++)
{
// search each searcher
// use NullLock, we don't care about synchronization for these
TopFieldDocs docs = MultiSearcherCallableWithSort(ThreadLock.NullLock, lockObj, searchables[i], weight, filter, n, hq, sort,
i, starts);
totalHits += docs.TotalHits;
maxScore = System.Math.Max(maxScore, docs.MaxScore);
}
ScoreDoc[] scoreDocs2 = new ScoreDoc[hq.Size()];
for (int i = hq.Size() - 1; i >= 0; i--)
// put docs in array
scoreDocs2[i] = hq.Pop();
return new TopFieldDocs(totalHits, scoreDocs2, hq.GetFields(), maxScore);
}