mayya-sharipova commented on a change in pull request #1351: URL: https://github.com/apache/lucene-solr/pull/1351#discussion_r417410225
########## File path: lucene/core/src/java/org/apache/lucene/search/FilteringNumericComparator.java ########## @@ -0,0 +1,329 @@ +/* + * 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.lucene.search; + +import org.apache.lucene.document.DoublePoint; +import org.apache.lucene.document.FloatPoint; +import org.apache.lucene.document.IntPoint; +import org.apache.lucene.document.LongPoint; +import org.apache.lucene.index.LeafReaderContext; +import org.apache.lucene.index.PointValues; +import org.apache.lucene.util.DocIdSetBuilder; + +import java.io.IOException; +import java.util.Arrays; + +/** + * A wrapper over {@code NumericComparator} that adds a functionality to filter non-competitive docs. + */ +public abstract class FilteringNumericComparator<T extends Number> extends FilteringFieldComparator<T> implements LeafFieldComparator { + protected final boolean reverse; + private boolean hasTopValue = false; + private PointValues pointValues; + private final int bytesCount; + private final byte[] minValueAsBytes; + private final byte[] maxValueAsBytes; + private boolean minValueExist = false; + private boolean maxValueExist = false; + private int maxDoc; + private int maxDocVisited; + private int updateCounter = 0; + private final String field; + protected boolean canUpdateIterator = false; // set to true when queue becomes full and hitsThreshold is reached + protected DocIdSetIterator competitiveIterator = null; + private long iteratorCost = 0; + + public FilteringNumericComparator(NumericComparator<T> in, boolean reverse, int bytesCount) { + super(in); + this.field = in.field; + this.bytesCount = bytesCount; + this.reverse = reverse; + minValueAsBytes = new byte[bytesCount]; + maxValueAsBytes = new byte[bytesCount]; + if (reverse) { + minValueExist = true; + } else { + maxValueExist = true; + } + } + + /** + * Returns an iterator over competitive documents + */ + @Override + public DocIdSetIterator competitiveIterator() { + if (competitiveIterator == null) return null; + return new DocIdSetIterator() { + private int doc; + @Override + public int nextDoc() throws IOException { + return doc = competitiveIterator.nextDoc(); + } + + @Override + public int docID() { + return doc; + } + + @Override + public long cost() { + return competitiveIterator.cost(); + } + + @Override + public int advance(int target) throws IOException { + return doc = competitiveIterator.advance(target); + } + }; + } + + @Override + public void setCanUpdateIterator() throws IOException { + this.canUpdateIterator = true; + // for the 1st time queue becomes full and hitsThreshold is reached + // we can start updating competitive iterator + updateCompetitiveIterator(); + } + + @Override + public void setTopValue(T value) { + hasTopValue = true; + if (reverse) { + maxValueExist = true; + } else { + minValueExist = true; + } + in.setTopValue(value); + } + + @Override + public void setBottom(int slot) throws IOException { + ((NumericComparator) in).setBottom(slot); + updateCompetitiveIterator(); // update an iterator if we set a new bottom + } + + @Override + public int compareBottom(int doc) throws IOException { + return ((NumericComparator) in).compareBottom(doc); + } + + @Override + public int compareTop(int doc) throws IOException { + return ((NumericComparator) in).compareTop(doc); + } + + @Override + public void copy(int slot, int doc) throws IOException { + ((NumericComparator) in).copy(slot, doc); + } + + @Override + public void setScorer(Scorable scorer) throws IOException { + ((NumericComparator) in).setScorer(scorer); + if (scorer instanceof Scorer) { + iteratorCost = ((Scorer) scorer).iterator().cost(); // starting iterator cost is the scorer's cost + updateCompetitiveIterator(); // update an iterator when we have a new segment + } Review comment: Opened [LUCENE-9352](https://issues.apache.org/jira/browse/LUCENE-9352) ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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