public override Explanation Explain(IndexSearcher searcher, Explanation firstPassExplanation, int docID)
{
TopDocs oneHit = new TopDocs(1, new ScoreDoc[] { new ScoreDoc(docID, firstPassExplanation.Value) });
TopDocs hits = Rescore(searcher, oneHit, 1);
Debug.Assert(hits.TotalHits == 1);
// TODO: if we could ask the Sort to explain itself then
// we wouldn't need the separate ExpressionRescorer...
Explanation result = new Explanation(0.0f, "sort field values for sort=" + sort.ToString());
// Add first pass:
Explanation first = new Explanation(firstPassExplanation.Value, "first pass score");
first.AddDetail(firstPassExplanation);
result.AddDetail(first);
FieldDoc fieldDoc = (FieldDoc)hits.ScoreDocs[0];
// Add sort values:
SortField[] sortFields = sort.GetSort();
for (int i = 0; i < sortFields.Length; i++)
{
result.AddDetail(new Explanation(0.0f, "sort field " + sortFields[i].ToString() + " value=" + fieldDoc.Fields[i]));
}
return(result);
}
/// <summary>
/// Returns <c>true</c> if the given <paramref name="reader"/> is sorted by the specified <paramref name="sort"/>.
/// </summary>
public static bool IsSorted(AtomicReader reader, Sort sort)
{
if (reader is SegmentReader)
{
SegmentReader segReader = (SegmentReader)reader;
IDictionary<string, string> diagnostics = segReader.SegmentInfo.Info.Diagnostics;
var diagnosticsSort = diagnostics.ContainsKey(SORTER_ID_PROP) ? diagnostics[SORTER_ID_PROP] : null;
if (diagnostics != null && sort.ToString().Equals(diagnosticsSort))
{
return true;
}
}
return false;
}
