/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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package org.apache.lucene.search.join;

import java.io.IOException;

import org.apache.lucene.index.DocValues;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.OrdinalMap;
import org.apache.lucene.index.SortedDocValues;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.LeafCollector;
import org.apache.lucene.search.Scorable;
import org.apache.lucene.util.LongBitSet;
import org.apache.lucene.util.LongValues;

A collector that collects all ordinals from a specified field matching the query.
@lucene.experimental
/** * A collector that collects all ordinals from a specified field matching the query. * * @lucene.experimental */
final class GlobalOrdinalsCollector implements Collector { final String field; final LongBitSet collectedOrds; final OrdinalMap ordinalMap; GlobalOrdinalsCollector(String field, OrdinalMap ordinalMap, long valueCount) { this.field = field; this.ordinalMap = ordinalMap; this.collectedOrds = new LongBitSet(valueCount); } public LongBitSet getCollectorOrdinals() { return collectedOrds; } @Override public org.apache.lucene.search.ScoreMode scoreMode() { return org.apache.lucene.search.ScoreMode.COMPLETE_NO_SCORES; } @Override public LeafCollector getLeafCollector(LeafReaderContext context) throws IOException { SortedDocValues docTermOrds = DocValues.getSorted(context.reader(), field); if (ordinalMap != null) { LongValues segmentOrdToGlobalOrdLookup = ordinalMap.getGlobalOrds(context.ord); return new OrdinalMapCollector(docTermOrds, segmentOrdToGlobalOrdLookup); } else { return new SegmentOrdinalCollector(docTermOrds); } } final class OrdinalMapCollector implements LeafCollector { private final SortedDocValues docTermOrds; private final LongValues segmentOrdToGlobalOrdLookup; OrdinalMapCollector(SortedDocValues docTermOrds, LongValues segmentOrdToGlobalOrdLookup) { this.docTermOrds = docTermOrds; this.segmentOrdToGlobalOrdLookup = segmentOrdToGlobalOrdLookup; } @Override public void collect(int doc) throws IOException { if (docTermOrds.advanceExact(doc)) { long segmentOrd = docTermOrds.ordValue(); long globalOrd = segmentOrdToGlobalOrdLookup.get(segmentOrd); collectedOrds.set(globalOrd); } } @Override public void setScorer(Scorable scorer) throws IOException { } } final class SegmentOrdinalCollector implements LeafCollector { private final SortedDocValues docTermOrds; SegmentOrdinalCollector(SortedDocValues docTermOrds) { this.docTermOrds = docTermOrds; } @Override public void collect(int doc) throws IOException { if (docTermOrds.advanceExact(doc)) { collectedOrds.set(docTermOrds.ordValue()); } } @Override public void setScorer(Scorable scorer) throws IOException { } } }