Examples with MultiKeySliceQuery org.janusgraph.graphdb.query.graph.MultiKeySliceQuery used on opensource projects

Example 1 with MultiKeySliceQuery

use of org.janusgraph.graphdb.query.graph.MultiKeySliceQuery in project janusgraph by JanusGraph.

the class IndexSerializer method query.

/* ################################################
                Querying
    ################################################### */
public Stream<Object> query(final JointIndexQuery.Subquery query, final BackendTransaction tx) {
    final IndexType index = query.getIndex();
    if (index.isCompositeIndex()) {
        final MultiKeySliceQuery sq = query.getCompositeQuery();
        final List<EntryList> rs = sq.execute(tx);
        final List<Object> results = new ArrayList<>(rs.get(0).size());
        for (final EntryList r : rs) {
            for (final java.util.Iterator<Entry> iterator = r.reuseIterator(); iterator.hasNext(); ) {
                final Entry entry = iterator.next();
                final ReadBuffer entryValue = entry.asReadBuffer();
                entryValue.movePositionTo(entry.getValuePosition());
                switch(index.getElement()) {
                    case VERTEX:
                        results.add(VariableLong.readPositive(entryValue));
                        break;
                    default:
                        results.add(bytebuffer2RelationId(entryValue));
                }
            }
        }
        return results.stream();
    } else {
        return tx.indexQuery(index.getBackingIndexName(), query.getMixedQuery()).map(IndexSerializer::string2ElementId);
    }
}