public static long count(IndexSearcher searcher, Query query) throws IOException {
TotalHitCountCollector countCollector = new TotalHitCountCollector();
// we don't need scores, so wrap it in a constant score query
if (!(query instanceof ConstantScoreQuery)) {
query = new ConstantScoreQuery(query);
}
searcher.search(query, countCollector);
return countCollector.getTotalHits();
}
@Override
public TopDocs topDocs(SearchContext context, FetchSubPhase.HitContext hitContext)
throws IOException {
final String field;
final String term;
if (isParentHit(hitContext.hit())) {
field = ParentFieldMapper.NAME;
term = Uid.createUid(hitContext.hit().type(), hitContext.hit().id());
} else if (isChildHit(hitContext.hit())) {
field = UidFieldMapper.NAME;
SearchHitField parentField = hitContext.hit().field(ParentFieldMapper.NAME);
if (parentField != null) {
term = parentField.getValue();
} else {
SingleFieldsVisitor fieldsVisitor = new SingleFieldsVisitor(ParentFieldMapper.NAME);
hitContext.reader().document(hitContext.docId(), fieldsVisitor);
if (fieldsVisitor.fields().isEmpty()) {
return Lucene.EMPTY_TOP_DOCS;
}
term = (String) fieldsVisitor.fields().get(ParentFieldMapper.NAME).get(0);
}
} else {
return Lucene.EMPTY_TOP_DOCS;
}
// Only include docs that have the current hit as parent
Filter filter = new TermFilter(new Term(field, term));
// Only include docs that have this inner hits type
Filter typeFilter = documentMapper.typeFilter();
if (size() == 0) {
TotalHitCountCollector collector = new TotalHitCountCollector();
context
.searcher()
.search(
new XFilteredQuery(query, new AndFilter(Arrays.asList(filter, typeFilter))),
collector);
return new TopDocs(collector.getTotalHits(), Lucene.EMPTY_SCORE_DOCS, 0);
} else {
int topN = from() + size();
TopDocsCollector topDocsCollector;
if (sort() != null) {
topDocsCollector =
TopFieldCollector.create(sort(), topN, true, trackScores(), trackScores(), false);
} else {
topDocsCollector = TopScoreDocCollector.create(topN, false);
}
context
.searcher()
.search(
new XFilteredQuery(query, new AndFilter(Arrays.asList(filter, typeFilter))),
topDocsCollector);
return topDocsCollector.topDocs(from(), size());
}
}
@Override
public TopDocs topDocs(SearchContext context, FetchSubPhase.HitContext hitContext)
throws IOException {
Filter rawParentFilter;
if (parentObjectMapper == null) {
rawParentFilter = NonNestedDocsFilter.INSTANCE;
} else {
rawParentFilter = parentObjectMapper.nestedTypeFilter();
}
FixedBitSetFilter parentFilter =
context.fixedBitSetFilterCache().getFixedBitSetFilter(rawParentFilter);
Filter childFilter = context.filterCache().cache(childObjectMapper.nestedTypeFilter());
Query q =
new XFilteredQuery(
query, new NestedChildrenFilter(parentFilter, childFilter, hitContext));
if (size() == 0) {
TotalHitCountCollector collector = new TotalHitCountCollector();
context.searcher().search(q, collector);
return new TopDocs(collector.getTotalHits(), Lucene.EMPTY_SCORE_DOCS, 0);
} else {
int topN = from() + size();
TopDocsCollector topDocsCollector;
if (sort() != null) {
try {
topDocsCollector =
TopFieldCollector.create(sort(), topN, true, trackScores(), trackScores(), true);
} catch (IOException e) {
throw ExceptionsHelper.convertToElastic(e);
}
} else {
topDocsCollector = TopScoreDocCollector.create(topN, true);
}
context.searcher().search(q, topDocsCollector);
return topDocsCollector.topDocs(from(), size());
}
}