| /* |
| * 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.queries.intervals; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Objects; |
| |
| class OverlappingIntervalsSource extends ConjunctionIntervalsSource { |
| |
| private final IntervalsSource source; |
| private final IntervalsSource reference; |
| |
| OverlappingIntervalsSource(IntervalsSource source, IntervalsSource reference) { |
| super(Arrays.asList(source, reference), false); |
| this.source = source; |
| this.reference = reference; |
| } |
| |
| @Override |
| protected IntervalIterator combine(List<IntervalIterator> iterators) { |
| assert iterators.size() == 2; |
| IntervalIterator a = iterators.get(0); |
| IntervalIterator b = iterators.get(1); |
| return new FilteringIntervalIterator(a, b) { |
| @Override |
| public int nextInterval() throws IOException { |
| if (bpos == false) |
| return IntervalIterator.NO_MORE_INTERVALS; |
| while (a.nextInterval() != IntervalIterator.NO_MORE_INTERVALS) { |
| while (b.end() < a.start()) { |
| if (b.nextInterval() == IntervalIterator.NO_MORE_INTERVALS) { |
| bpos = false; |
| return IntervalIterator.NO_MORE_INTERVALS; |
| } |
| } |
| if (b.start() <= a.end()) |
| return a.start(); |
| } |
| bpos = false; |
| return IntervalIterator.NO_MORE_INTERVALS; |
| } |
| }; |
| } |
| |
| @Override |
| public int minExtent() { |
| return source.minExtent(); |
| } |
| |
| @Override |
| public Collection<IntervalsSource> pullUpDisjunctions() { |
| return Disjunctions.pullUp(Arrays.asList(source, reference), ss -> new OverlappingIntervalsSource(ss.get(0), ss.get(1))); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(this.subSources); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other instanceof OverlappingIntervalsSource == false) return false; |
| OverlappingIntervalsSource o = (OverlappingIntervalsSource) other; |
| return Objects.equals(this.subSources, o.subSources); |
| } |
| |
| @Override |
| public String toString() { |
| return "OVERLAPPING(" + source + "," + reference + ")"; |
| } |
| } |