Github user jpountz commented on a diff in the pull request: https://github.com/apache/lucene-solr/pull/345#discussion_r179741828 --- Diff: lucene/core/src/java/org/apache/lucene/search/DisjunctionMatchesIterator.java --- @@ -0,0 +1,160 @@ +/* + * 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 java.io.IOException; +import java.util.ArrayList; +import java.util.List; + +import org.apache.lucene.index.LeafReaderContext; +import org.apache.lucene.index.PostingsEnum; +import org.apache.lucene.index.Term; +import org.apache.lucene.index.Terms; +import org.apache.lucene.index.TermsEnum; +import org.apache.lucene.util.BytesRef; +import org.apache.lucene.util.BytesRefIterator; +import org.apache.lucene.util.PriorityQueue; + +/** + * A {@link MatchesIterator} that combines matches from a set of sub-iterators + * + * Matches are sorted by their start positions, and then by their end positions, so that + * prefixes sort first. Matches may overlap, or be duplicated if they appear in more + * than one of the sub-iterators. + */ +public final class DisjunctionMatchesIterator implements MatchesIterator { --- End diff -- can we reduce visibility?
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