001/* 002 * Copyright (c) 2016-2017 Chris K Wensel <chris@wensel.net>. All Rights Reserved. 003 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved. 004 * 005 * Project and contact information: http://www.cascading.org/ 006 * 007 * This file is part of the Cascading project. 008 * 009 * Licensed under the Apache License, Version 2.0 (the "License"); 010 * you may not use this file except in compliance with the License. 011 * You may obtain a copy of the License at 012 * 013 * http://www.apache.org/licenses/LICENSE-2.0 014 * 015 * Unless required by applicable law or agreed to in writing, software 016 * distributed under the License is distributed on an "AS IS" BASIS, 017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 018 * See the License for the specific language governing permissions and 019 * limitations under the License. 020 */ 021 022package cascading.tap.hadoop.io; 023 024import java.io.IOException; 025 026import cascading.util.SingleValueCloseableIterator; 027import org.apache.hadoop.mapred.RecordReader; 028 029/** 030 * RecordReaderIterator is a utility class for handing off a single {@link RecordReader} instance 031 * via the {@link java.util.Iterator}. 032 * <p> 033 * This class is frequently used with the {@link cascading.tuple.TupleEntrySchemeIterator} where there is only 034 * one RecordReader to iterate values over. 035 */ 036public class RecordReaderIterator extends SingleValueCloseableIterator<RecordReader> 037 { 038 public RecordReaderIterator( RecordReader reader ) 039 { 040 super( reader ); 041 } 042 043 @Override 044 public void close() throws IOException 045 { 046 getCloseableInput().close(); 047 } 048 }