| /* |
| * 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; |
| |
| abstract class RelativeIterator extends IntervalIterator { |
| |
| final IntervalIterator a; |
| final IntervalIterator b; |
| |
| boolean bpos; |
| |
| RelativeIterator(IntervalIterator a, IntervalIterator b) { |
| this.a = a; |
| this.b = b; |
| } |
| |
| @Override |
| public int docID() { |
| return a.docID(); |
| } |
| |
| @Override |
| public int nextDoc() throws IOException { |
| int doc = a.nextDoc(); |
| reset(); |
| return doc; |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| int doc = a.advance(target); |
| reset(); |
| return doc; |
| } |
| |
| @Override |
| public long cost() { |
| return a.cost(); |
| } |
| |
| protected void reset() throws IOException { |
| int doc = a.docID(); |
| bpos = b.docID() == doc || |
| (b.docID() < doc && b.advance(doc) == doc); |
| } |
| |
| @Override |
| public int start() { |
| return a.start(); |
| } |
| |
| @Override |
| public int end() { |
| return a.end(); |
| } |
| |
| @Override |
| public int gaps() { |
| return a.gaps(); |
| } |
| |
| @Override |
| public float matchCost() { |
| return a.matchCost() + b.matchCost(); |
| } |
| } |