| /* |
| * 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 ContainedByIntervalsSource extends ConjunctionIntervalsSource { |
| |
| static IntervalsSource build(IntervalsSource small, IntervalsSource big) { |
| return Intervals.or(Disjunctions.pullUp(big, s -> new ContainedByIntervalsSource(small, s))); |
| } |
| |
| private final IntervalsSource small; |
| private final IntervalsSource big; |
| |
| private ContainedByIntervalsSource(IntervalsSource small, IntervalsSource big) { |
| super(Arrays.asList(small, big), false); |
| this.small = small; |
| this.big = big; |
| } |
| |
| @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.end()) { |
| if (b.nextInterval() == IntervalIterator.NO_MORE_INTERVALS) { |
| bpos = false; |
| return IntervalIterator.NO_MORE_INTERVALS; |
| } |
| } |
| if (b.start() <= a.start()) |
| return a.start(); |
| } |
| bpos = false; |
| return IntervalIterator.NO_MORE_INTERVALS; |
| } |
| }; |
| } |
| |
| @Override |
| public int minExtent() { |
| return small.minExtent(); |
| } |
| |
| @Override |
| public Collection<IntervalsSource> pullUpDisjunctions() { |
| return Disjunctions.pullUp(big, s -> new ContainedByIntervalsSource(small, s)); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(subSources); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other instanceof ContainedByIntervalsSource == false) return false; |
| ContainedByIntervalsSource o = (ContainedByIntervalsSource) other; |
| return Objects.equals(this.subSources, o.subSources); |
| } |
| |
| @Override |
| public String toString() { |
| return "CONTAINED_BY(" + small + "," + big + ")"; |
| } |
| } |