| /* |
| * 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 |
| * limitations under the License. |
| */ |
| package org.apache.solr.search.join; |
| |
| import java.io.IOException; |
| import java.io.UncheckedIOException; |
| import java.util.Objects; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.search.DocIdSet; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.join.BitSetProducer; |
| import org.apache.lucene.search.join.QueryBitSetProducer; |
| import org.apache.lucene.search.join.ScoreMode; |
| import org.apache.lucene.search.join.ToParentBlockJoinQuery; |
| import org.apache.lucene.util.BitDocIdSet; |
| import org.apache.lucene.util.BitSet; |
| import org.apache.lucene.util.Bits; |
| import org.apache.solr.common.params.SolrParams; |
| import org.apache.solr.request.SolrQueryRequest; |
| import org.apache.solr.search.BitsFilteredDocIdSet; |
| import org.apache.solr.search.Filter; |
| import org.apache.solr.search.QParser; |
| import org.apache.solr.search.SolrCache; |
| import org.apache.solr.search.SolrConstantScoreQuery; |
| import org.apache.solr.search.SyntaxError; |
| |
| public class BlockJoinParentQParser extends FiltersQParser { |
| /** implementation detail subject to change */ |
| public static final String CACHE_NAME="perSegFilter"; |
| |
| protected String getParentFilterLocalParamName() { |
| return "which"; |
| } |
| |
| @Override |
| protected String getFiltersParamName() { |
| return "filters"; |
| } |
| |
| BlockJoinParentQParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) { |
| super(qstr, localParams, params, req); |
| } |
| |
| protected Query parseParentFilter() throws SyntaxError { |
| String filter = localParams.get(getParentFilterLocalParamName()); |
| QParser parentParser = subQuery(filter, null); |
| Query parentQ = parentParser.getQuery(); |
| return parentQ; |
| } |
| |
| @Override |
| protected Query wrapSubordinateClause(Query subordinate) throws SyntaxError { |
| String scoreMode = localParams.get("score", ScoreMode.None.name()); |
| Query parentQ = parseParentFilter(); |
| return createQuery(parentQ, subordinate, scoreMode); |
| } |
| |
| @Override |
| protected Query noClausesQuery() throws SyntaxError { |
| SolrConstantScoreQuery wrapped = new SolrConstantScoreQuery(getFilter(parseParentFilter())); |
| wrapped.setCache(false); |
| return wrapped; |
| } |
| |
| protected Query createQuery(final Query parentList, Query query, String scoreMode) throws SyntaxError { |
| return new AllParentsAware(query, getFilter(parentList).filter, ScoreModeParser.parse(scoreMode), parentList); |
| } |
| |
| BitDocIdSetFilterWrapper getFilter(Query parentList) { |
| return getCachedFilter(req, parentList); |
| } |
| |
| public static BitDocIdSetFilterWrapper getCachedFilter(final SolrQueryRequest request, Query parentList) { |
| SolrCache<Query, Filter> parentCache = request.getSearcher().getCache(CACHE_NAME); |
| // lazily retrieve from solr cache |
| BitDocIdSetFilterWrapper result; |
| if (parentCache != null) { |
| try { |
| Filter filter = parentCache.computeIfAbsent(parentList, |
| query -> new BitDocIdSetFilterWrapper(createParentFilter(query))); |
| if (filter instanceof BitDocIdSetFilterWrapper) { |
| result = (BitDocIdSetFilterWrapper) filter; |
| } else { |
| result = new BitDocIdSetFilterWrapper(createParentFilter(parentList)); |
| // non-atomic update of existing entry to ensure strong-typing |
| parentCache.put(parentList, result); |
| } |
| } catch (IOException e) { |
| throw new UncheckedIOException(e); // Shouldn't happen because nothing in here throws |
| } |
| } else { |
| result = new BitDocIdSetFilterWrapper(createParentFilter(parentList)); |
| } |
| return result; |
| } |
| |
| private static BitSetProducer createParentFilter(Query parentQ) { |
| return new QueryBitSetProducer(parentQ); |
| } |
| |
| static final class AllParentsAware extends ToParentBlockJoinQuery { |
| private final Query parentQuery; |
| |
| private AllParentsAware(Query childQuery, BitSetProducer parentsFilter, ScoreMode scoreMode, |
| Query parentList) { |
| super(childQuery, parentsFilter, scoreMode); |
| parentQuery = parentList; |
| } |
| |
| public Query getParentQuery(){ |
| return parentQuery; |
| } |
| } |
| |
| // We need this wrapper since BitDocIdSetFilter does not extend Filter |
| public static class BitDocIdSetFilterWrapper extends Filter { |
| |
| private final BitSetProducer filter; |
| |
| BitDocIdSetFilterWrapper(BitSetProducer filter) { |
| this.filter = filter; |
| } |
| |
| @Override |
| public DocIdSet getDocIdSet(LeafReaderContext context, Bits acceptDocs) throws IOException { |
| BitSet set = filter.getBitSet(context); |
| if (set == null) { |
| return null; |
| } |
| return BitsFilteredDocIdSet.wrap(new BitDocIdSet(set), acceptDocs); |
| } |
| |
| public BitSetProducer getFilter() { |
| return filter; |
| } |
| |
| @Override |
| public String toString(String field) { |
| return getClass().getSimpleName() + "(" + filter + ")"; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return sameClassAs(other) && |
| Objects.equals(filter, getClass().cast(other).getFilter()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return classHash() + filter.hashCode(); |
| } |
| } |
| |
| } |
| |
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