| /* |
| * 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.tajo.engine.planner.physical; |
| |
| import org.apache.tajo.storage.Scanner; |
| import org.apache.tajo.storage.Tuple; |
| |
| import java.io.IOException; |
| |
| /** |
| * This scan iterator performs full scan. |
| */ |
| public class FullScanIterator implements ScanIterator { |
| private final Scanner scanner; |
| private Tuple currentTuple; |
| |
| public FullScanIterator(Scanner scanner) { |
| this.scanner = scanner; |
| } |
| |
| @Override |
| public boolean hasNext() throws IOException { |
| return (currentTuple = scanner.next()) != null; |
| } |
| |
| @Override |
| public Tuple next() { |
| return currentTuple; |
| } |
| } |
| |