| /* |
| * 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.Collection; |
| import java.util.Collections; |
| import java.util.Objects; |
| import java.util.stream.Collectors; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.search.QueryVisitor; |
| |
| class ExtendedIntervalsSource extends IntervalsSource { |
| |
| final IntervalsSource source; |
| private final int before; |
| private final int after; |
| |
| ExtendedIntervalsSource(IntervalsSource source, int before, int after) { |
| this.source = source; |
| this.before = before; |
| this.after = after; |
| } |
| |
| @Override |
| public IntervalIterator intervals(String field, LeafReaderContext ctx) throws IOException { |
| IntervalIterator in = source.intervals(field, ctx); |
| if (in == null) { |
| return null; |
| } |
| return new ExtendedIntervalIterator(in, before, after); |
| } |
| |
| @Override |
| public IntervalMatchesIterator matches(String field, LeafReaderContext ctx, int doc) throws IOException { |
| IntervalMatchesIterator in = source.matches(field, ctx, doc); |
| if (in == null) { |
| return null; |
| } |
| IntervalIterator wrapped = new ExtendedIntervalIterator(IntervalMatches.wrapMatches(in, doc), before, after); |
| return IntervalMatches.asMatches(wrapped, in, doc); |
| } |
| |
| @Override |
| public void visit(String field, QueryVisitor visitor) { |
| source.visit(field, visitor); |
| } |
| |
| @Override |
| public int minExtent() { |
| int minExtent = before + source.minExtent() + after; |
| if (minExtent < 0) { |
| return Integer.MAX_VALUE; |
| } |
| return minExtent; |
| } |
| |
| @Override |
| public Collection<IntervalsSource> pullUpDisjunctions() { |
| Collection<IntervalsSource> inner = source.pullUpDisjunctions(); |
| if (inner.size() == 0) { |
| return Collections.singleton(this); |
| } |
| return inner.stream().map(s -> new ExtendedIntervalsSource(s, before, after)).collect(Collectors.toSet()); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| ExtendedIntervalsSource that = (ExtendedIntervalsSource) o; |
| return before == that.before && |
| after == that.after && |
| Objects.equals(source, that.source); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(source, before, after); |
| } |
| |
| @Override |
| public String toString() { |
| return "EXTEND(" + source + "," + before + "," + after + ")"; |
| } |
| } |